磷肥不同施用方式对土壤速效磷及春玉米磷素吸收和产量的影响

摘要

通过田间小区试验的方法研究了磷肥不同施用方式下，土壤速效磷含量变化、超高产春玉米磷素吸收规律以及产量的变化。结果表明，土壤速效磷含量随施磷量的增加呈增加的趋势，苗期不同处理间差异显著，至蜡熟期差异逐渐减小。施用磷肥提高了春玉米植株对磷素的吸收量，在磷肥总量相同的条件下，不同基肥、追肥比例春玉米磷素吸收量有所不同。春玉米产量与磷肥施用量呈典型抛物线关系，一定范围内随施磷量增加春玉米产量呈增加的趋势，过量施用磷肥导致减产。%Field experiment was carried out to study the effects of different phosphorus applications on soil available phosphorus and phosphorus absorption of spring maize .The results showed that the content of soil available phosphorus increased with the application of phosphorus , and each treatment was signifi-cantly different in seedling , and it tended to be the same when mature .The phosphorus absorption in plant increased with the application of phosphorus , and the phosphorus absorption was different with dif-ferent ratio between basal fertilizer and top application .The production increased with the application of phosphorus within a certain limit and decreased beyond some extent .