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对土壤肥力进行长期定位监测,了解土壤肥力动态,不仅能预测大面积土壤肥力变化,而且能为制定合理施肥和改土培肥方案提供科学依据。 一、监测方法 1.选点原则:一是能代表所在农区主要土壤类 型的土种:二是该土种面积在该乡(镇)占较大比例。自1983年10月以来先后建立了6个土壤肥力定位监测点(表1)。 2.监测处理:各监测点均为稻、麦轮作制,统一设两个处理:(1)常规施肥区,即根据当地农民施肥习惯,任其掌握施肥种类和数量;(2)无
Long-term positioning and monitoring of soil fertility, to understand the dynamics of soil fertility, not only can predict changes in soil fertility in large areas, but also provide a scientific basis for the formulation of rational fertilization and soil improvement and fertilization programs. First, the monitoring method 1 election principle: First, can represent the main types of soil in the farming area of soil species: Second, the soil area in the township (town) accounted for a large proportion. Since October 1983 has established six soil fertility monitoring points (Table 1). 2. Monitoring and treatment: The monitoring points are all rice and wheat rotation system. There are two treatments in a unified way: (1) conventional fertilization area, that is, according to local farmers’ fertilization habits, they should grasp the types and quantity of fertilizers; (2)