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试验研究和生产实践证明,磷肥在甘肃大部分耕地土壤上都有一定增产效果,适量增施磷肥是提高作物产量的重要措施之一。但由于以往的试验研究多偏重于施磷当年或当季的效果,很少注意磷肥的后效,因而所得结论及施肥建议难免带有某些片面性和局限性。有鉴于此,我们按照全国化肥试验网的方案,于1981—1984年在河西灌区进行了磷肥不同分配方式
Experimental research and production practice have proved that phosphate fertilizer has a certain yield increase effect on most cultivated soils in Gansu Province. Appropriate amount of application of phosphate fertilizer is one of the important measures to increase crop yield. However, due to the fact that the previous experimental studies mostly focused on the effects of the phosphorus application in the current year or the current season, little attention was paid to the aftereffect of the phosphate fertilizer. Therefore, the conclusions and fertilization recommendations inevitably have some unilateral and limitations. In view of this, in accordance with the program of the National Fertilizer Experimental Network, we conducted different distribution methods of phosphate fertilizer in Hexi Irrigation Area from 1981 to 1984