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贵州以玉米生产为主的主要耕作制,为小麦、油菜、豌豆、蚕豆等与玉米组成一年两熟制,一熟玉米也有一定的面积。由于前作的收种季节不同,对土壤肥力的影响也有不同,因而对后作生长状况、产量等也有所不同。为了切实抓好我省玉米生产,解决早地耕作制中存在的问题。本试验在于探明不同前作对玉米产量及土壤肥力的影响,为我省因地制宜地搞好作物布局和合理轮作提供理论依据。
The main farming system of corn production in Guizhou is wheat, rape, pea, broad bean and so on, which are composed of two crops of corn and one area of corn. Due to the different harvesting seasons, the impact on soil fertility is also different, so the growth status, yield and so on are also different. In order to earnestly grasp the corn production in our province, solve the problems existing in the early farming system. The purpose of this experiment is to find out the effect of different preconditions on corn yield and soil fertility and to provide a theoretical basis for our province to do a good job of crop layout and reasonable rotation according to local conditions.