施肥量与肥料利用率关系研究与应用

在其它环境因素相对稳定的条件下,单一肥料的利用率与其施用量呈直线递减函数关系;在不同类型土壤、不同肥力土壤上,肥料利用率和肥料实际可提供的养分量都存在着极限,肥料效应和作物产量都受到其限制,只有从改善环境条件、改善管理措施等方面入手突破极限,肥料利用率和作物产量才能得到提升;Stanford平衡施肥公式中同时存在两个未知参数,应用时需要修正,修正公式的参数可以通过单因素试验获得。依据施肥量与肥料利用率关系函数,建立施肥量、肥料利用率和肥料实际可提供养分量对照表,进行推荐施肥。

Study on Relation between Fertilizer Dosage and Its Recovery Efficiency and Their Application

Under the stability condition of other environment factors,utilization of single fertilizer presents with its dosage to monotonous reduce function.On different soil types and different fertility soils,there were limitation on fertilizer recovery efficiency and the available nutrient provided by fertilizer.Fertilizer effect and farm crop yield were all subjected to its restriction,only from improvement environment condition,improvement management measure etc.commence breakthrough extreme limit,they then can be promoted.The Stanford balance formula in the meantime exist 2 unknown parameters,so needed correction while applying.The parameters of revised formula could be acquired by setting out a single factor experiment.So the cross tabulation of fertilization rate,fertilizer recovery efficiency and the available nutrients provided by fertilizer could be established to carry on fertilization recommendation.