西宁郊区菜农受传统观念影响认为西宁市郊土壤中含钾较丰富，一般情况不下缺钾。生产上往往偏施氮肥、磷肥，而通过施肥补充给土壤的钾很少；近年来耕作频繁、复种指数提高，土壤中钾素消耗多，而黄瓜又是需钾量大的蔬菜，从而造成了西宁地区黄瓜产量低、品质差。为此，我... Xining suburbs vegetable farmers affected by the traditional concept that the soil in Xining suburbs rich in potassium, potassium deficiency is generally no less. Nitrogen and phosphate fertilizers are often biased in production, while potassium supplemented to the soil by fertilizing is scarce. In recent years, the cultivation has been frequent, the multiple cropping index has been increased, and the potassium in the soil has been consumed more. Cucumber is also a vegetable with a large amount of potassium, resulting in Xining cucumber production is low, poor quality. For this, I ...