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通过北京昌平“国家褐潮土土壤肥力和肥料效益监测基地”的长期定位试验(1991～2004年),研究了褐潮土条件下长期施肥对作物氮磷吸收利用及土壤速效氮磷供应能力的影响。主要结论是:无论是作物总养分吸收量还是养分表观利用率,氮磷钾配合施用均高于单一施氮或氮磷钾两两配合处理;耕层土壤碱解N含量氮磷钾配施有机肥或秸秆处理优于单施化肥;氮磷钾配施有机肥土壤速效磷含量比不施肥增加11倍,而磷钾比对照增加5倍;氮磷、或氮磷钾配施秸秆、或氮磷钾配合分别比对照增加3倍左右。
Through long-term experiment (1991-2004) of Changping, a national base for soil fertility and fertilizer benefit monitoring in brown soil, the effects of long-term fertilization on the uptake and utilization of crop nitrogen, phosphorus and available nitrogen and phosphorus The impact of ability. The main conclusions are as follows: No matter total crop nutrient uptake or apparent nutrient utilization, NPK combination application is higher than single N or NPK combination treatment; The treatment of organic manure or straw was better than that of chemical fertilizers alone. The contents of available phosphorus in soil with N, P and K fertilizers increased 11-fold compared with non-fertilizers and P-K increased 5-folds compared with the control. Nitrogen and phosphorus, N, P and K with the control were increased by about 3 times.