【摘要】 本文根据１３年的定位研究资料，较系统的阐述了不同量有机肥与氮、磷化肥配合施用，及关中灌区两熟制粮食产量、土壤肥力和养分平衡的影响。初步揭示了关中楼土的基本生产力持续时间较短；土壤的供肥能力是玉米高于小麦。作者认为采用有机肥与氮、磷化肥配施，才是该区粮田持续高产和土壤培肥的有效措施。更多还原

【Abstract】 Effects of combined application of organic manure and chemical fertilizers on crop yields, Soil fertility and nutrient balance were studied systematically according to the results of a 13-year located experiment. The results show that the basic productivity of lou soil in Guanzong could be kept in a shorter period of time. The amounts of soil nutrients supplied for corn were higher than those for wheat. So, the application of N and P in combination with organic manure would be an efficient way for raising crop fields and soil fertility in irrigated area.更多还原