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在甘肃中部的白银市平川灌区砂田连续3年进行西瓜平衡施肥田间试验研究,结果表明:在本区砂田西瓜采用平衡施肥增产效果明显,且效益显著,在施用一定有机肥基础上,N、P2O5、K2O施用以135kg hm-2、90～135kg hm-2、150 kghm-2或135∶90∶150～225的配比较为经济合理,其肥料的产投比达4以上,钾肥合理配施,产投比可达6以上,钾肥净增收益达到5106～5715元hm-2。试验证明,平衡施肥对西瓜的产量和收益比当地习惯施肥增加40%～50%,且可提高作物抗病、抗逆性,改善产品品质,显著提高商品价值。
In the middle of Gansu Baiyin Pingchuan irrigation area sand for three consecutive years of watermelon balanced fertilization field trials, the results showed that: Sandy watermelon using balanced fertilization yield significantly, and significant benefits, based on the application of certain organic fertilizer, N, P2O5 , K2O application is more economical and reasonable with the ratio of 135kg hm-2, 90-135kg hm-2,150 kghm-2 or 135:90:150-225, and the ratio of production and input of fertilizer is above 4, Output ratio up to 6 or more, net profit of potash reached 5106 ~ 5715 yuan hm-2. Experiments show that the balanced fertilization on watermelon yield and benefit than the local habitual fertilization increased by 40% to 50%, and can improve crop disease resistance, resistance, improve product quality, significantly improve the value of the commodity.