论文部分内容阅读
一、缓控释肥发展历程1、概念所谓缓控释肥,是指通过各种调控机制使其养分按照设定的释放率和释放期缓慢或控制释放的肥料。缓控释肥是在传统肥料外层包一层特殊的膜,根据作物养分需求,控制养分释放速度和释放量,使养分释放曲线与作物需求相一致。这种肥料具有提高化肥利用率、减少使用量与施肥次数、降低生产成本、减少环境污染、提高农作物产品品质等优点,突出特点是其释放率和释放期与
A controlled release fertilizer development process 1, the concept of so-called controlled release fertilizer, refers to a variety of regulatory mechanisms to make its nutrients in accordance with the set release rate and release of slow or controlled release of fertilizer. Controlled-release fertilizer is a special film coated on the outer layer of traditional fertilizers, according to the nutrient needs of crops, control the release rate and release of nutrients, the nutrient release curve consistent with the crop needs. The fertilizers have the advantages of increasing the utilization rate of chemical fertilizers, reducing the usage and the number of fertilizers, reducing the production cost, reducing the environmental pollution and improving the quality of the crop products, and the salient features are the release rate and the release period and