前言我县是大豆主产区,栽培面积仅次于小麦,但是,历年单产不高,总产不稳,其原因是生产水平低,管理粗放,草荒严重,但不施肥也是低产的主要因素。大豆是需肥较多的作物。但是,有些人认为:大豆有根瘤,能固氮,是一种不需要施肥的作物。我们针对这种情况,在缺少农家肥的情况下,探讨一下合理施用化肥,提 Preface My county is the main producing area of ​​soybean, and its cultivated area is second only to that of wheat. However, it has been characterized by low yield and gross yield over the years due to its low production level, extensive management and serious shortage of grass. Soybeans are crops that need more fertilizer. However, some people think that soybeans have nodules and can fix nitrogen. They are crops that do not need fertilizer. We address this situation, in the absence of manure, to explore the rational use of fertilizers, mention