施肥技术对土壤肥力和肥料利用率的影响

广州增城市农科所肥料长期定位试验点始建于 1987年 ,共设置 6个施肥处理 ,2 0 0 3年对经过 16年耕作后其土壤肥力和肥料利用率的测定结果表明 :有机无机配施处理和氮磷钾配施处理的土壤仍维持与建点时相当的地力水平 ;单纯施用化学肥料处理 ,土壤出现不同程度的酸化现象 ;有机无机配施处理和氮磷钾配施处理不仅能获得高产 ,而且肥料利用率较高。

Effects on the fertility of soil and the utilization rates of fertilizer affected by fertilizer practices

The monitoring site for the soil and fertilization was established in 1987 at Zengcheng Institute of Agricultural Sciences in GuangZhou, a fertilization test with six different practices has been being carried out there from then. After the test have been conducted for sixteen years in 2003, It showed that: the practice of coordination of manure with NPK mineral fertilizer and the practice of NPK mineral fertilizer could keep the fertility of soil well-matched with which in the original; the practices of mineral fertilizer simply tended to acidify the soil; the practice of coordination of manure with NPK mineral fertilizer and the practice of NPK mineral fertilizer not only harvested high yield but also heightened the utilization rates of fertilizer.