论文部分内容阅读
肥料是植物生长发育的物质基础。随着国民经济的迅速发展,农作物产量和复种指数的提高,对地力和肥料的消耗就越来越大。解决的办法除合理安排作物轮作换茬、用地与养地结合外,如何正确处理好作物产量与施肥的关系至关重要。因此,了解和掌握土壤的供肥能力,按照作物产量对肥料的需要,相应地供给作物必须的养料,则是当前合理施肥的中心议题。 合理施肥的目的有二:一是通过合理施肥措施,协调作物对营养元素的需要与土壤供肥的矛盾,从而达到高产、优质;二是用较少的肥料投入,取得较高的产量和最大的
Fertilizer is the material basis for plant growth and development. With the rapid development of the national economy, the increase of crop yield and multiple cropping index will consume more land fertility and fertilizer. The solution to the problem of crop rotation in addition to rational arrangements for crop rotation, land and the combination of land, how to properly handle the relationship between crop yield and fertilization is essential. Therefore, understanding and mastering the ability of soil to supply fertilizers, according to the crop yield to the needs of fertilizers, and correspondingly supplying the necessary nutrients for crops, are the central topics of reasonable fertilization at present. The purpose of rational fertilization is twofold: First, through reasonable fertilization measures, coordinating the contradiction between the nutrient needs of crops and soil for fertilizer, so as to achieve high yield and good quality; second, with less fertilizer, achieve higher yield and maximum of