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二、提高化肥施用效益的方法1.氮磷或氮磷钾配合施用施用单一元素的化肥难以满足作物生长发育的需要。做到氮磷钾等营养元素协调供应,才能使作物获得稳产高产。我省土壤中氮磷营养元素俱缺,增氮补磷,氮磷配合施用,对提高单位面积产量是十分重要的。根据研究结果:小麦、玉米在中等肥力土地上,氮、磷比例以2∶1较为适宜。土地肥力水平较低时,氮、磷比例为1∶1(N∶P_2O_5)。土地肥力水平较高时,氮、磷比例为1∶0.25。对
Second, to improve the efficiency of fertilizer application methods 1. Nitrogen and phosphorus or NPK with a single application of chemical fertilizers difficult to meet the needs of crop growth and development. To achieve a coordinated supply of nutrients such as nitrogen, phosphorus and potassium in order to make the crop stable and high yield. Soil nitrogen and phosphorus in our province lack of nutrients, increased nitrogen and phosphorus, nitrogen and phosphorus with the application, to improve the yield per unit area is very important. According to the results of the study: wheat, corn in medium fertility land, nitrogen and phosphorus ratio of 2: 1 is more appropriate. When the level of soil fertility is low, the ratio of nitrogen and phosphorus is 1: 1 (N: P2O5). When soil fertility is high, the ratio of nitrogen to phosphorus is 1: 0.25. Correct