CÂN BẰNG HÓA HỌC VÀ TÌNH TRẠNG DINH DƯỠNG K, CA, MG, MN ĐỐI VỚI LÚA CỦA 6 BIỂU LOẠI ĐẤT TRỒNG LÚA Ở ĐỒNG BẰNG SÔNG CỬU LONG
Abstract
The study aimed to understand K, Ca, Mg and Mn nutrient status in soil. Six soil profiles were evaluated. Soil chemicals were analysed and equilibrium calculated for each nutrient. Results showed that K was not controlled by any minerals in the soil profiles. Cai Lay soil has 20% of illite-clay, but this mineral does not control the solubility of K in soil solution, this indicated that K was refixed by clay. Potasium soil solution is closely controlled by Soil-K. The difference between Soil-K release and K in soil solution varied among soils used in this study and increased by the order of: Cai Lậy
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References
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