论文部分内容阅读
近年来,随着粮食产量的提高和复种指数的上升,作物从土壤中所摄取的养分也随之增加,同时由于氮磷肥料的施用较多,而钾肥的施用较少,上壤中的钾素已不能满足作物高产的需要,并成为高产的限制因素。为了进一步摸清我县钾肥肥效及施用量等问题,自1984年开始试验、示范、推广施钾,已达40多万亩,取得了较显著的增产效果,收到了较高的经济效益。现介绍如:
In recent years, with the increase of grain yield and the rise of cropping index, the nutrient uptake of crops from the soil also increases. At the same time, due to the more application of nitrogen and phosphorus fertilizers and less application of potassium fertilizer, Sufficient to meet the needs of high-yield crops, and become a limiting factor for high yield. In order to further clarify the fertilizer and fertilizer application rate and other issues in our county, since 1984, testing, demonstration, promotion of potassium, has reached more than 400000 acres, has achieved significant yield increase, received higher economic benefits. Is introduced as: