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天水市渭河流域川区,土壤肥沃,耕作精细,灌溉条件优越。长期以来,以小、麦——复种黄豆(或玉米)——小麦连作制为主,地力消耗大,成本高,效益低。1984年北道区农技人员在中滩、石佛、渭南三乡通过试验、示范,筛选出“两年四熟,三粮一油”优化多元复合耕作制(简称“2431”),两年一循环,种植三熟粮食作物,一熟油料作物。七年来,该区粮食总产持续增长,经济收入逐年提高,土壤肥力不断上升。据统计,1990年中滩、渭南、石佛三乡粮食总产为2848.66万公斤,种植业收入2671.56万元,分
Tianchui Weihe River Basin, fertile soil, fine farming, irrigation conditions. For a long time, with small, wheat - multiple cropping soybean (or corn) - wheat continuous cropping system, geocentric consumption, high cost, low efficiency. In 1984, the agricultural technicians in Beidao District, through experiments and demonstrations in Zhongtan, Shifo and Weinan Townships, screened and optimized the compound cultivation system (“2431”) of “Four Mushu, Three Grains and One Oil” for two years Recycling, planting three cooked food crops, a cooked oil crops. In the past seven years, the total grain output in the area has continued to grow, its economic income has been increasing year by year, and soil fertility has been on the rise. According to statistics, the total grain output of Zhongtan, Weinan and Shifu Townships in 1990 was 28,486,600 kg, and the planting industry income was 26,715,600 yuan,