【摘要】 我省大部分土壤供磷能力较差,成为增产的限制因素。本文研究了省内几种主要土类的供磷的动力学因素(R),试图把R值作为划分土壤肥力的指标,并建立了R值对有效磷量的回归方程,以了解有效磷和R值的联系,作为施用磷肥的依据。更多还原

【Abstract】 The P-supplying capacity of the major soils of Jilin province is poorer, which becomes a limiting factor of increasing yield. In the present paper, the dynamics factor (R) of P-supplying of several major soils of the province was studied. It was intended to use R value as an index which divided soil fertility. And the regression equation of R value vs. available P was established to find out the relationship between available P and R value, which are used as the basis of applying P fertilizers. (CH)更多还原