The study was conducted to find out the heavy metal concentration(As, Cd, hg, Pb) in rice soil when steel slag fertilizer was applied. Pot experiments were conducted in the net house in the College of the Environment and Natural Resources, Can Tho University, while field experiments were conducted in Kien Giang and Hau Giang provinces. The study started from July 2012 to September 2013. The experiment was designed in randomized complete  blocks. Fertilizers applied included NPK and steel slag fertilizers. Rice varieties included Nui Voi 1, OM5451 and IR50404. Three treatments and four replications were designed to the experiement. Soil samples were collected for heavy metals analysis such as As, Cd, Hg, Pb at the beginning and end of growing cycle (after 1 year). The results in the net house showed that As, Cd, Hg, Pb did not exceed the permitted level of Vietnam standard QCVN 03:2008/BTNMT. The field experiment at Hoa An and Binh Son showed that As, Cd, Hg, Pb also did not exceed the permitted level in accordance with Vietnam standard QCVN 03:2008/BTNMT. However, all of the remaing heavy metals after experiements were lower than Vietnam standard. It was concluded that heavy metals (As, Cd, Hg, Pb) did not change or exceed Vietnam standard for acid sulfate soil after experiments.

Bouea macrophyla (Bouea macrophylla Griffith) from Binh Minh, Vinh Long province was used for the study. The effect of extraction conditions, such as types of enzyme (pectinase and hemicellulase) with different concentrations ranging from 0.03 to 0.05% for 30 to 60 mins on juice recovery and the contents of bioactive compounds were studied. The obtained results showed that the sample was treated by pectinase concentration of 0.04% for 45 mins given the highest juice recovery (85.33%). At these treatment conditions, the content of total polyphenols, beta-carotene, vitamin C were 39.42 mgGAE/mL, 0.83 μg/mL, and 32.12%, respectively. Response surface methodology with central composite design was employed to optimize pectinase concentration (0.035¸0.045%) and incubation time (40¸50 mins). Based on response surface and desirability graph, the optimum conditions for extraction of Bouea macrophyla pulp were at the concentration of 0.041% of pectinase enzyme for the incubation time of 43.2 mins resulted in highest juice yield (86.95%), and the contents of polyphenol, beta-carotene and vitamin C were 38.94 mgGAE/mL, 0.83 µg/mL, 32.52 mg%, respectively.

Con Trong at Ong Trang estuary is the ideal site for studying ecology of mangrove because mangrove forest was formed by accretion, and there is less human impact. The aim of the present study is to analysis the effects of soil factors on species distribution of mangrove in this region. There were 43 quadrats (10 x 10 m) in this study area; in each quadrat, species were identified, soil characteristics were measured; soil samples were collected to determine N, P, and K content. The result showed that soil characteristics such as salinity, pH, content (%) of nitrogen, phosphorus and potassium had significant effects on the species distribution of mangrove. The various groups belonging to soil factors were identified. This study provided baseline for management and conservation of mangroves.

The study was carried out to investigate the presence of extended-spectrum beta-lactamase producing Escherichia coli (ESBL E. coli) isolated from 80 fecal samples of chicken rearers in the Mekong Delta by the combination disc methods. The results showed that 62.5% samples infected ESBL-producing E. coli. One hundred and twenty-two ESBL E. coli isolates were selected for the antibiotic susceptibility test to 14 antibiotics by the disc diffusion method. The results showed that these isolates were resistant to 3-13 antibiotics. Resistance was most frequently observed to beta-lactams: ampicillin (96.67%), cefaclor (97.5%) and cefuroxime (100%). However, these isolates were still sensitive to amikacin (94.17%), fosfomycin (96.67%), colistin (83.33%) and doxycycline (70%). Twenty-one multidrug-resistant ESBL producing E.coli isolates were selected for the determination of beta-lactamase coding CTX-M and TEM genes by PCR method. The result showed that TEM gene and CTX-M gene were frequently detected in the tested isolates (100% and 90.5% respectively).

The study was carried out to determine the incidence of Canine parvovirus (CPV) infection in one-month to over-6-months dogs having bloody diarrhea in the Department of Husbandry and Veterinary Tien Giang, the Veterinary Clinic of Dong Thap, and the Veterinary Clinic of Can Tho University from November 2017 to May 2018 , by using the CPV – Ag rapid test kit. The results of diagnosis showed that dogs in Tien Giang, Dong Thap and Can Tho were positive with CPV antigen (30.00%, 34.00%, and 30.00%, respectively). The proportion of infected dogs aged  from 1 to 3 months in Tien Giang, Dong Thap and Can Tho had a higher in by CPV decreased (60.00%; 58.82%;60.00%, respectively) incidence rate than those of infected dogs aged from more than 6 months in three provinces (6.67%; 5.88%; 0.00%, respectively). There was no statistically significant difference in infected rates in males and females in three provinces. The incidence rate of domestic dogs and exotic dogs in Tien Giang, Dong Thap and Can Tho were 53.33% and 46.67%, 52.94% and 47.06%, 53.33% and 46.67%, respectively. The results also showed that dogs vaccinated against CPV had infected rate much lower than that of unvaccinated dogs (6.67% and 93.33%; 5.88% and 4.12%; 13.33% and 6.67%, coresponding to Tien Giang, Dong Thap and Can Tho. The rate of recovery in dogs from CPV enteritis after fluid transfusion therapy combined with antibiotics in Tien Giang and Can Tho were 86.67% and 58.82%, respectively.

The aim of the study was to determine the presence of Riemerella anatipestifer causing riemerellosis in ducks. There were 1,595/58,000 suspected riemerellosis ducks with 2.75%, 664/1,595 dead ducks with 41.63% at Mo Cay Nam, Mo Cay Bac and Chau Thanh districts in Ben Tre Province. In 150 suspected riemerellosis ducks, samples with typical symptoms were collected from heart, liver and spleen. The result showed that R. anatipestifer was isolated from 76/150 samples with 50.67%. The presence rates of R. anatipestifer in organ samples were in spleen(24.66%), liver (32.67%) and heart (36.67%). The specific gene 16S rRNA for R. anatipestifer causing riemerellosis was detected in 50/76 isolated positive samples, accounted for 65.79%. The antimicrobial susceptibility of R. anapestifer was highest (100%) to tetracycline, doxycycline, flofenicol, ceftiofur, cefotaxime followed by ampicillin (67.74%), enrofloxacin (58.06%), and gentamycin (56.45%). However R. anatipestifer was resistant to sufamethoxazole/trimethoprim (82.26%), streptomycin (67.75%), and erythromycin (58.06%). Especially, R. anatipestifer was resistant highest (100%) to spectinomycin.

The study was started from 11/2017 to 2/1028 to determine the incidence of Canine Parvovirus (CPV) infection in dogs from1month to over 6 months of age with bloody diarrhea based on the CPV-Ag rapid test kit in Veterinary Clinic of Can Tho University. In this study, 105 of 356 dogs showed positive with CPV (29.45%). The proportion in infected dogs from 1 to less than 3 months of age was significantly higher than those at 5 to 6 months of age (42.99% vs14.46%). There was no significant difference in infection between male dogs and female dogs. The proportion of infected dog in local and exotic breed was 29.49% and 29.50% respectively. The results showed that CPV vaccinated dogs were significantly lower in CPV infection than unvaccinated dogs (3.70% vs 31.61%). In general, 84.76% CPV infected dogs were recovered after treatment.

The surveillance of physiolocial blood parameters, clinical and pathological symptoms were observed in Fasciola gigantica infected cattle in nature and infected cattle in experimental infection in Mekong Delta. The blood test results showed that the erythocytes and leukocytes and hemoglobin (HGB) were changed dramatically between the Fasciola gigantica infected cattle and healthy cattle.The infected cattle with Fasciola gigantica in nature and  infected cattle with Fasciola gigantica from experimental infection showed that Fasciola gigantica infected cattle had some clinical symptoms such as emaciation, reduced rumination, diarrhea alternating with constipation, anorexia, pale mucous membrane. Pathological signs of Fasciola gigantica infected cattle were recorded such as hepatitis and cirrhosis, hemorrhage spots on the surface of livers. Histopathology of fasciolosis in cattle were observed as bile ducts becoming fibrotic and calcified hemorrhagic, congestic hepatic parenchyma, and atrophy of hepatic lobes.

The study was conducted to evaluate the effect of compost and lime on improving saline acid sulphate soil in green-house condition. The pot experiment was arranged in the completely randomized design with 4 replications of 6 fertilizer treatments including the control which only used inorganic fertilizers. Other treatments include using organic amendments (i.e., using 5 tons/ha of sugarcane filter cake compost, and 5 tons/ha Bio-Pro, with and without adding 500 kg CaCO3/ha), and only using lime. The results showed that application of organic amendment in combination with lime help increase soil pH, available nitrogen and phosphorus content, but reduce exchangeable aluminum content and exchangeable sodium percentage, and also enhance the salinity tolerance of rice. Thus, in turn, rice growth and rice yield were improved. Based on such promising results, field studies needed for confirming and giving practical recommendations.

Escherichia coli is one of the causative agents of infectious diseases in swine, especially, edema disease in post-weaning pigs with high mortality that caused farmers economic losses. The study was conducted from January 2017 to April 2018 to identify the prevalence, F4, F18 trains containing virulent gene Stx2e and their antimicrobial resistance. In  total 1,387 piglets from  76 herds at four districts in Kien Giang province were studied. There were 207 sick piglets with 19.47% and no significant difference in four districts. Out of 207 sick piglets, there were 165 dead piglets with 61.11% and was a significant difference by districts. The common typical symptoms were eyelids swelling (90.65%), head edema (80.37%), moving convulsion (69.16%). E. coli was isolated from 107/107 samples (100%) including feces and lymph node samples. Gene encoding virulent factor Stx2e was  high percentage (47.66%); E. coli isolated rate was not significantly different by ages; E. coli isolated in piglets from households (82.24%) that was higher than that in piglets from the farms (17.76%), and E. coli isolated from piglets in rainy season (61.68%) was higher than that in dry season (38.32%). E. coli strains were sensitive to 9/12 antibiotics. They were highly resistant to trimethoprim/sulfamethoxazole (95.33%), ampicillin (92.52%) and streptomycin (62.62%). There were 103/107 E. coli trains showing multi-resistance to at least 2 to 9 antimicrobial testing and extremely diversified and complicated multi-resistant types.

The study is to investigate the suitable host plant for Plutella xylostella and the resutls showed that Brassica integrifolia was the best host plant for the development of Plutella xylostella compared to Brassica juncea and Brassica oleracea, respectively. For Cotesia vestalis, 30% of concentration of honey yielded the highest longevity of Cotesia vestalis at 4.33 ± 0.13 days for male and 7.00 ± 0.03 days for female parasitoid compared to water as the control. Nutrition resources from yellow cosmos (Cosmos sulphureus) also significantly increased the longevity of C. vestalis in comparison with that in the water (P

Specimen samples from 100 limberneck ducks (including: 80 serum samples, 100 gut content samples and 100 liver samples) were collected in some districts of Can Tho city and Kien Giang province, from May 2016 to April 2017. Gut content samples and liver samples were used for isolation of Clostridium botulinum by culturing on Cooked –Meat medium and blood agar, then PCR tests were used to identify Clostridium botulinum type (Miia Lindstrom and Hannu Korkeala, 2001; Amit-Romach et al., 2004). Serum samples were used for detecting botulin (toxin of Clostridium botulinum) by mouse lethality assay as the description of CDC (1998). The result of isolation showed that 21% (42/200) samples were possitive to Clostridium spp. Results of typing by PCR method showed that Clostridium botulinum type C, type D and type E made up 2.38% (1/42), 9.52% (4/42), 9.52% (4/42), respectively. The results of botulin toxin determination revealed that 49/80 sera (61.25%) without the heat treatment caused the death of mice, while the heat treatment sera did not cause mice death. The result of the determination of toxin type, the rate of toxin type C was 61,23%, followed by type D (32.65%), and type E (6.12%). The result showed that Clostridium botulinum type C, D, E was the main causes of limberneck duck disease in Can Tho city and Kien Giang province.

The experiment was carrried out in randomized complete block design with 8 treatments and 5 replications. The treatments were the beds made by hand or using wood frame and supplimented with different amount of spawn. The results indicated that the temperature and pH of the bed were within the allowable range for rice straw mushroom growth. The bed temperature affected the weight of mushroom fruit body. The average temperature of frame bed was lower by 2.20C than that of the hand-made bed.The length, width and width/length ratio of the first 30 mushroom fruit bodies are not affected by the way of making bed. The hand-made bed supplimented with 160 g/m of spawn gave the highest total weight of mushroom fruit body (2.86 kg) and number of mushroom fruit body (347.6).

To evaluate the effect ofPseuderanthemum palatiferum on growth performance andpreventing duck’s diseases, P. palatiferum leaf powder (LP) form was mixed in feed. A total of180 Cherry Valley supper meatducks at the age of 10 days were used in theexperiment concluding 4 treatments: control (noLP), three other treatments were prepared by addition of 1.8gLP/kgdiets (treatment1), 2.4gLP/kg diets (treatment2), and 3.0g LP/kg diets (treatment3). After 30 experimental days, the results showed that LP with the dosage of2.4gLP/kg diets was the most effective with respect to growth rate (47.4 g/duck/day), followed by3.0gLP/kg diets(45.8g/duck/day), 2.0gLP/kg diets (39.7 g/duck/day) and the lowest at control (37g/duck/day). The survival rate was lowest in the control (82.2%),subsequently in treatment 1 (93.3%)andtreatment2 (95.6%)and the highest in treatment3 (97.8%). The dosages of2.4g and 3gLP/kg diets were also the most effective with respect to the number of erythrocytes, packed blood cell volume and mean cell volume. After 30 days of mixing LP in feed, no lesion in duck’s livers and duck’s kidneys was found in treatment 3. It is concluded that using of Pseuderanthemum palatiferumLPin the dietsisuseful in growth performance of ducks, prevention of duck’s diseases and shows no toxicity.

The objective of this study was to evaluate the efficiency of five isolated silicate solubilizing bacteria on germination rate, growth and biomass of rice under the condition supplemented with and without NaCl. The five highly isolated silicate solubilizing bacteria including Ochrobactrum ciceri TCM_39 (TCM_39), Microbacterium neimengense MCM_15 (MCM_15), Klebsiella aerogenes LCT_01 (LCT_01), Olivibacter jilunii PTST_30 (PTST_30) and Citrobacter freundii RTTV_12 (RTTV_12) were tested with rice cultivar IR50404 in Hoagland medium. The results showed that two bacterial strains, LCT_01 and RTTV_12 supported to have a higher rate of germination of rice seeds with 94.7% and 92.0%, respectively as compared to that of the control treatment. Besides, in the experimental set with Hoagland medium containing no NaCl and 0.3% NaCl, the treatments with TCM_39 and PTST_30 obtained the highest total of rice dry biomass of 13.4 mg and 13.8 mg as compared to that of the control treatment.

Oil was extracted from the seeds of white-flesh dragon fruit (Hylocereus undatus) and red-flesh dragon fruit (Hylocereus polyrhizus) using petroleum ether. The aim of the study was to characterize the physicochemical properties, fatty acid profile, and tocopherol content of dragon fruit seed oil. In addition, the influence of different storage conditions, [i.e. in brown/transparent glass bottle, stored at room temperature (30±2oC) or at low temperature (5oC)], of the extracted dragon fruit seed oil on the oxidative stability was monthly monitored during a 3-month storage period. The results showed that both dragon fruit seed varieties contained remarkable amount of oil ranging from 31.3 % for the red-flesh to 33.9 % for the white-flesh variety. The predominant fatty acid in both dragon fruit seed oils was linoleic acid (C18:2). The total tocopherol content in the red-flesh dragon fruit seed oil was higher than that in the white-flesh dragon fruit seed oil (391.3 mg/kg compared to 323 mg/kg). Thus, the dragon fruit seed oil can be considered as high-value oil due to its oil composition. After a 3-month storage period, the peroxide values of both oils packed in the transparent glass bottles at room temperature were 3.1 times higher than those of the oil packaged in the brown glass bottles (33.5 mEq O2/kg compared to 10.7 mEq O2/kg).

The purpose of this study is to investigate optimal conditions for proteins’ hydrolysis of white shrimp head meat (Litopenaeus vannemei) by using alcalase enzyme. The response surface methodology with two factors: pH (6.5-8.0) and temperature (50-70°C) which included 11 experiments was used to optimize the hydrolysis process. Meanwhile, the effect of the alcalase enzyme concentrations on degree of hydrolysis (%DH) and antioxidant activity (%DPPH) was evaluated at 5 values: (10, 20, 30, 40, 50 UI/g) with 6 different reaction times (1, 2, 3, 4, 5, 6 hours). Consequently, the following conditions including alcalase enzyme concentrations (20 UI/g), pH (7.65), temperature (58.78°C), and hydrolysis time (4 hours) were found optimal to hydrolyze the proteins in white shrimp head meat with a high degree of hydrolysis (37.6%) and good antioxidant activity (31.57%).

The utilization rags of jackfruit in wine making was studied in order to produce higher value-added products as well as solve partly the environmental pollution issues. The fermentation of the rags of jackfruit was performed at pH of 4,0-5,0 and oBrix of 21-25%. The results showed that pH 4,0 and oBrix of 23% can be applied in wine making. High amount of total alcohol (15%) was observed in the wine product whereas less sugar content as residues (0,47%) was determined in the fermented substrates at day 9. So far, this is the first study evaluating the yeast counts during fermentation; the growth rate of yeast increased rapidly after 6 days but decreased steadily from day 6 to day 12. Additionally, a strong correlation was observed between specific gravity - total alcohol (r = -0,909); oBrix - total sugar content (r = 0,97), and specific gravity - total sugar content (r = 0,969). It is suggested that the specific gravity could be used to predict the total alcohol and sugar content during fermentation process while oBrix can be estimated total sugar content.

The effect of germination time on changes in free amino acid and protease activity in five rice varieties: IR 5451, IR 50404, OM 4900, Jasmine 85, and OM 6976 were investigated. Seeds are soaked for 24 hours with distilled water (after 12 hours, seeds are drained in 30 minutes, and water is changed and germinated at 30oC, germination time varies from 1-8 days. The results showed that the activity of the protease increased during the germination period from 1-8 in all five rice varieties surveyed and reached the highest on day 6-7 germinated and started to decrease activity from day 8, with the exception of Jasmine 85, the protease activity was highest after day 3 and started to reduce from day 4. Changes in free amino acid content (mg/g) were expressed in the direction of increase in protease activity and in different rice varieties. Dry matter losses during seed germination also increased over time and were diffience from the varieties. Thus, the duration of soaking and germination effected on protease activity for each rice variety, and the change in seed characteristics after germination also showed differences in different rice varieties.

Mixed juice, including carrots, apples and cucumbers is considered a nutritious drink to remove toxins from the body. In this study, the effect of carrot blanching (steam and microwave) for 2, 4, 6 and 8 minutes on the bioactive compounds and antioxidant activity was evaluated. Box-Behnken experimental design for response surface methodology was applied to optimize the ingredients' components at variable ratios (carrots 60¸80%, apples 10¸30% and cucumber 10¸30%). The content of bioactive compounds (b-carotene, polyphenols, vitamin C) and anti-oxidant activity of the product was analyzed. The most effective blanching treatment was 4 min by steam water at 100oC. At this time-temperature combination, the content of b-carotene, polyphenol, vitamin C were found to be 2.21 μg/mL, 145.62 mgGAE/L, 10.84 mg%, respectively and high antioxidant activity (DPPH 46.25%), whereas the content of these compounds in carrots was lower when immunized with microwave (b-carotene 1.77 μg/mL, polyphenol 128.32 mg/L, vitamin C 14.21 mg% and anti-oxidant activity 32.97%). The optimum ratio of carrots-apples-cucumbers obtained in the mixed juice product from the applied surface-response analysis was 60-26.8-10 (% w /w). Optimized parameters were verified.

The aim of this research was to determine mulching methods and rootstocks affecting on tolerance ability of hot pepper to bacterial wilt caused by Ralstonia solanacearum and yield in field condition at Tan Hoa and Tan Hue communes of Thanh Binh district, Dong Thap province. The experiments were designed as four-replication split-plots of two factors. The main factor (in sub-plots) includes five cultivars used as rootstocks (local, TN557, Hiem 27, and self-grafted and non-grafted as two controls). The secondary factor (in main plots) is mulching methods including silvery-gray plastic and rice straw as control. The results of rootstock in Tan Hoa, chilli grafted on TN557 had a lower disease incidence (18.8%) than non-grafted control (36.3%) at the end of harvest, fruit yield 10.3 t/ha, higher than 25.0% compared to the non-grafted control and 32.1% compared to the control grafted on itself. In Tan Hue, chilli grafted on TN557 also had a lower incidence of bacterial wilt (20.0%) than non-grafted control (38.8%) at the end of harvest, fruit yield 5.44 t/ha, higher than 18.0% compared to the non-grafted control and 23.4% compared to the control self-grafted. Mulching materials did not affect bacterial wilt disease, the yield of chilli using silvery gray mulch was 9.63 t/ha, equivalent to 33.0% higher than that of ricestraw mulch in Tan Hoa commune and 5.17 tons/ha, equivalent to 30.5% higher than that of rice straw mulch in Tan Hue commune.

This study aimed to determine the effect of irrigation regimes on the fruit cracking phenomenon and yield of Rongrien rambutan (Nephelium lappaceum L.). The experiment was carried out at 6-year-old Rongrien rambutan trees in Nhon Ai commune - Phong Dien district - Can Tho city, in on-season 2016 (from March to July). The experiment design was randomized complete block with ten replications for each treatment and each of which had a tree. Treatments were four irrigation intervals, including (1) control (no irrigation), (2) 2 days, (3) 4 days and (4) 8 days. The water level in the irrigation ditch was kept at 0.4 - 0.5 m lower than the raised bed and watered 20 liters per tree. Watering for the first time at the stage of 2 weeks after fruit set until harvest, in early morning. The results showed that irrigation interval of 2 days had lower the proportion of fruit cracking than 2.03 times and increased commercial yield 17.4%; and irrigation of 4 days was 1.07 folds and 4.3% in contrast with those of the control (respectively). All irrigation regimes did not affect on fruit flesh quality at harvest.

Tuberose (Polianthes tuberosa L.) cut spikes have short vase life after harvest. Two experiments were conducted to determine the effect of pulsing tuberous cut spikes with 10% sucrose for 24 hours alone or combined with spraying GA3 at 5 ppm before keeping the stalks on some different concentrations of chemicals on extending the vase life and post harvest quality of tuberose spikes. The results showed that, pre-treatment with 10% sucrose for 24 hours before keeping in aspirin 100 ppm solution increased the vase life up to 14 days, compared to 9 days in the control; it could remain the the florets quality and reduced the percentage of flower wilting and dropping. Pulsing with 10% sucrose for 24 hours and spraying with GA3 5 ppm along with two different holding solutions of GA3 5 ppm or aspirin 100 ppm recorded significantly higher stalks increase, lower percentage of wild and dropped folwers, maximum percentage of floret opening as well as lengthening the life of cut tuberose spikes (15,3 days and 14,8 days, respectively) over control (9,8 days). Sprayed florets with GA3 5 ppm induced percentage of bud opening when compared with non-spraying.

The rice-upland crops rotation system was a cultivation technique that could replace the unsustainable monoculture rice system. The study aimed to evaluate the effect of the ricewatermelon rotation system on soil nitrogen and phosphorus availability and rice yield in the monoculture rice area in Long My district, Hau Giang province where was potential acid sulfate soils affected by saline intrusion. The experiment was conducted in a randomized complete block design with two treatments: rice-watermelon rotation (RW) and rice-rice (RR) as the control treatment. There were three replicates for each treatment. The results showed that the soil available N content in RW treatment (111.7 mg N/kg) was significantly higher than that in RR treatment (28.7 mg N/kg). However, the available phosphorus was not different between two treatments. In the following rice crop, the rice yield from the RW system (5.10 tons/ha) and RR system (4.80 tons/ha) were not significantly different. The total profit of watermelon crop system was 40.983 million Vietnam dong being 3 times higher than the monoculture rice system (13.476 million Vietnam dong). The RW rotation system can be applied in the potential acid sulfate soils to replace the mono-rice system for the improvement of the content of available N, farmers' income and to cope with saline intrusion in rice cultivation.

To determine the soil factors affecting vascular plant species distribution and diversity based on different soil conditions, the study was conducted in Ferralsols, Leptosols and Acrisols in the mountainous area of An Giang province. The soil was mainly sandy component that accounted for more than 50% of the mineral fragments. The soil properties were characterized by low nitrogen and organic matter while the content of K, Ca and Mg were relatively high. The mean value of pHKCl and EC were the highest in Acrisols and the lowest in Ferralsols (p

The research was conducted to assess the sustainability of farming systems in Hau Giang province from three aspects, economic, social and environmental. Based on the analysis and comparison between the sustainability of the models and the management mechanism of the localities to develop the strategy for management of land resources to ensure sustainable development under the impact of climate change. Households interview was conducted to collect the data on the economic, social and environmental situation of the selected farming models. A kite method for suitable assessment was applied to select a sustainable development for resource management. Cost-benefit analysis, data standardization, direct interview, expected cost approach and Likert scale were applied, based on criteria of food and Agriculture Organization of the United Nations (FAO, 2007). The results showed that within five farming models, 3 models had high suitability for 3 objectives including pineapple model, fruit trees, 2 rice crops, while sugarcane had lower value of sustainability of society, needs to be considered. However, 3 rice crops eventhough had high value in society and enviroment its economic value was low. Thus, based on those results, the local government needs to develop the strategies to limit the constraints for better sustainable development.

The objective of the research was the reuse of sludge from beer (BS), seafood (SS) factory and sugarcane filter cake for composting to produce microbial-organic fertilizer (bioF). The experiments were (i) evaluation of the composting process and quality of the mature composts in 0.5 m3 composting scale, and (ii) effects of bioF on yield of vegetables. The results showed that the microbial-organic fertilizers from BS and SS had high qualities with 2.83-2.85% N; 5.6-6.63% P2O5, 2.1-2.11% K2O, and 35.21-40.98% C, respectively. Heavy metal contaminants and pathogen (Salmonella and Escherichia coli) were under the allowable limit. The population of Trichoderma met required standard with 7.14x107 to 7.82x107 CFU/g. Vegetable yields in the treatments amended with NPK recommended rate (RR) and 5 tons/ha of bioF made from BS and SS mixed with sugarcane filter cake increased statistically higher than those with NPK farmer rate (FR) and RR. Mustard yield amended with RR and 5 tons/ha of bioF doubled up treatments of FR and RR. Okra yield increased by 50.73% compared to RR and 40.91% compared to FR. Cucumber yield was about 17 tons/ha, 35% higher than that of FR and 10% compared to RR. Winter melon yield increased by 18% compared to RR and 25% compared with FR. Therefore, microbial-organic fertilizer composting from BS and SS mixed with sugarcane filter cake at ratio of 20:80 can be used to improve vegetable yields.

This study was conducted to evaluate the effect of sludge admentment on soil nutrients and rice yields in rice-shrimp cropping system. The experiment was set up in a randomized complete block design with five treatments (NT), including: NT1 - without fertilizers; NT2 – applied with 5-cm depth of sludge; NT3 - applied with NPK fertilizers at 60 N-40 P2O5-30 K2O kg/ha; NT4 - applied with NPK fertilizers at 2/3 rate of NT3 (40 N-27 P2O5-20 K2O kg/ha); and NT5 - a combination of NT2 and NT4. There were 4 replications for each treatment. The results showed that the amount of available nitrogen mineralized in the treatments with sludge application was significantly higher than that of no sludge application (p

The study is to discover species of Magnoliopsida plants at Xeo Quyt Relic in Cao Lanh District, Dong Thap Province through field trips and sample collecting from 40 standard frames of its 10 typical ecosystems. Those species then were classified and arranged into categories and classification systems. The species identified were also analyzed and evaluated on diversity in species composition and tree types. The results revealed that 264 species explored of the Magnoliopsida class belong to 176 genera, 65 families, 37 orders and 7 subclasses. Among these, Rosidae is the most diversified and dominant subclass with 69 species, and Fabaceae consists of 24 species. The flora has 5 main types of trees including woody plants, herbs, shrubs, vines and parasitic plants; of which herbaceous plants dominate with 122 species. In terms of usable values the explored species were categorized into 10 main groups; of which 105 species are of ornamental and 94 species of medicinal plants. In this Relic site, Elaeocarpus hygrophilus Kurz, Callophyllum inophyllum L. are 2 endangered species and 6 invasive alien species include Mimosa pigra L., Mimosa diplotricha C. Wright ex Sauvalle, Lantana camara L., Chromolaena odorata (L.) R. King et H. Robins, Ageratum conyzoides L., Wedelia trilobata (L.) Hitch. From the study results, 160 Magnoliopsida plant species were added to the list of plant species in Xeo Quyt Relic.

Agricultural areas in the coastal provinces in the Mekong Delta have been affected by climate change. The objectives of this study were to: (i) determine the influence levels of six hydrological factors including salinity, salinity time, flooding, flooding time, drought and rainfall on agricultural production; and (ii) evaluate and zone the agricultural areas where were affected by climate change. The research interviewed 34 experts and 210 farmers living in coastal provinces in the Mekong Delta of Vietnam. The data was analyzed by multi-critical evaluation (MCE) method based on consistency ratio. Mapinfo sotfware was used to zone and establish the zoning map of agricultural production areas which were affected by climate change. The results of study showed that the natural factors level could be assessed using multi-critical evaluation method. The rice, upland crops and aquaculture systems were affected by salinity intrusion and flooding. Models of fruits and sugarcane were affected by flooding. Agricultural production zones were affected by climate change at different levels (low, moderate, and high) occupied 66%, 22% and 12%, respectively.