论文部分内容阅读
配方施肥是依据作物养分归还原理、最V、养分律、肥料效益报酬递减三大规律和根据大量的田间示范验证、筛选、修正，形成了完整的科学施肥体系。目前其基本技术按定量水平可归纳为三类：第一类为地力分区（级）配方法：按土壤肥力高低分若干等级，或划出一个肥力均等的田块，作
Formula fertilization is based on the principles of crop nutrient return, the most V, nutrient law, fertilizer returns diminishing three laws and based on a large number of field demonstration validation, screening, correction, forming a complete system of scientific fertilization. At present, their basic technologies can be classified into three categories according to their quantitative levels: The first category is subdivision (grade) with the following methods: dividing soil fertility into several grades or allocating one fertile field for