Tạp chí
Đặng Văn Minh (trang 5-8, 18)
Từ khoá: thành phần, lân, đất, chè, Đồng Hỷ, Thái Nguyên
Summary
Phosphate fraction in the long-term tea cultivated soils at Dong Hy district, Thai Nguyen province
Total P was higher in the cropped soils, as result of P fertilizer accumulation. High concentrations of NaOH extractable Pi (Fe and Al phosphates), together with low concentrations of plant available P in the cultivated soils suggests the P was being fixed. Ca-P and total organic P were also accounted for a large amount pf P, but as with the Fe and Al phosphates, they were nit available for plants. Organic P was tightly bound in organo-mineral complexes associated with strongly humified organic matter.
