长期不同施肥措施对三大土类中钾素平衡的研究

Research on effect of long-term and different meaures of fertilizer application upon the balanced potassium in three major soils

在黄褐土、潮土、砂姜黑土三大土类区,进行了不同施肥措施对土壤中钾素盈缺的研究,结果表明:不同施肥处理由于作物产量的不同造成土壤中钾素的盈缺差异,在施肥措施相似条件下,由于土壤类型不同,土壤中钾素的盈缺也同样存在差异;在不施肥处理中3 种土壤钾素亏缺顺序为潮土> 砂姜黑土> 黄褐土。在不施钾肥条件下,单一施用氮、磷肥或低氮、磷肥配施造成土壤中钾素的亏缺小于高氮磷肥配施的条件下造成的亏缺。在施用钾肥条件下,当氮、磷、钾及有机肥之间配施比例不同时,土壤中钾素盈缺是不同的,其中表现为黄褐土钾素有盈余,潮土和砂姜黑土表现为亏缺。

The balanced potassium study was conducted by long term and different measures of fertilizer application in three different soils. The results indicated that there is a great difference among different measures of fertilizer applications on balanced potassium in three different soils. At the same measure of fertilizer application, the abundance or deficiency of potassium of soil is different in three soils. At no fertilizer application, deficiency of potassium of soil order is Chao soil, Shajiang black soil and He soil. At applying potassium fertilizer, The potassium of He soil is abundant, the potassium of Chao soil and Shajiang black soil are deficient.