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本文总结了半干旱黑垆土区 1 990~ 1 999年长期定位施肥的试验结果 .有机肥在提高旱地生产力和土壤肥力方面起着主导作用 .在施入等量氮磷养分下 ,平均有机肥增产 4 6 6% ,有机肥 +化肥增产4 4 8% ,化肥增产 2 2 4 % .施肥后效和土壤肥力均随施肥量的增加而提高 .后效的增产率在 3年内的约占原施肥处理的 1 / 4~ 1 / 3.
This paper summarizes the results of long-term fertilization experiments from 1990 to 1999 in the semi-arid frigid soil.The organic manure plays a leading role in improving dry land productivity and soil fertility.Under applying the same amount of N and P nutrients, the average organic fertilizer 4 6 6% increase of yield, 4 4 8% increase of organic fertilizer + chemical fertilizer and 22.4% increase of chemical fertilizers. Fertilization efficiency and soil fertility increased with the increase of fertilizer application. Fertilization treatment 1/4 to 1/3.