小麦／玉米带田磷肥分配方式及后效研究

在小麦／玉米带田种植条件下，磷肥不仅当年增产显著，而且有明显后效，施磷量越高，后效越大。带田小麦对磷肥的反应明显大于玉米。等量磷肥逐年分施的增产率与一次性施用相近，但耕层土壤速效磷含量高于一次性集中施用

Distribution and Residual Effects of P Fertilizer in Wheat/Maize Strip Intercropping

Under the condition of wheat/maize strip intercropping,P fertilizer not only could significantly increase grain yield in the first year of application,but also had apparently residual effects.The more P was applied,the greater of residual effects.The response of intercropped wheat to P fertilizer was much stronger than that of maize. The effects of P fertilizer application with certain amount in years or only in the first year had no much difference.But the content of available P in arable soil layer of treatments with P application in years is higher than that of single P application only in the first year.