Nguyễn Thế Hùng, J. Schoenau (trang 43-48)
Từ khoá: ảnh hưởng, phân bón, N, P, K, lân, đất dốc, Thái Nguyên
The effects of long-term N, P and K fertilization for cassava on sloping land on soil P fractionations in Thai Nguyen province
Effects of 9 year of N, P and K fertilization for cassava o sloping land. Long-term application of N significantly increased almost all inorganic P pools while having little effects on soil organic fractions. Long-term P fertilization increased all soil inorganic and organic P pools except organic P extracted by NaHCO3 and residual P. Long-term K addition did not have any significant effects in soil P fractionations except an increase in resin P.