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一、輪作换茬制度是用地养地的关键培养和提高土壤肥力,保証作物稳收高产,是作物栽培的根本任务。培养和提高土壤肥力的办法很多,包括合理耕作、改良土壤、作物輪作换茬,以及施肥、灌溉、消灭杂草等等。而其中,以作物輪作換茬最为重要。因为在作物輪作換茬过程中,包括有土壤耕作、作物施肥、灌溉和其他田間管理,只要作物布局合理,其他的培养和提高土壤肥力的措施便可迎刃而解。 1961年通过在桐城稻区的調查,发現有两种类型的生产单位,一是粮食产量逐年下降,
First, the rotation cropping system is the key to raising land and raising soil fertility, to ensure that the crop is stable and yield is the fundamental task of crop cultivation. There are many ways to cultivate and improve soil fertility, including rational farming, soil improvement, rotation of crops, fertilization, irrigation, weed elimination and more. Among them, crop rotation is the most important crop rotation. Because crop rotation, cropping, crop irrigation, and other field management during the rotation of crops, other measures to cultivate and improve soil fertility can be easily achieved as long as the crop is well-placed. In 1961 through the Tongcheng rice area survey found that there are two types of production units, first, grain output decreased year by year,