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70年代,我乡种稻方法落后,管理粗放,收获时节田间稗、稻两层楼,高层为稗,低层为稻,稗先于稻成熟而落粒,水稻亩产一般只有200kg。80年代,农民们实行科学种田,至1987年,全乡5000多亩水稻平均亩产420kg,小面积丰产田达到700—800kg。在水稻高产栽培中,我们看到,水稻群体达一定界限,田间就会郁蔽,通风透光差,病虫害重,易致倒伏而严重减产。专家们研究指出,水稻产量90％来自光合作用产物,且90％是抽穗以后积累起来的。据此,又联想稗稻高矮两层楼的启示,我们从1983年开始搞水稻不同高矮、早晚熟品种按
In the 1970s, the method of growing rice in our country lagged behind and the management was extensive. During the harvest, barnyardgrass and rice were harvested in the field. The upper layer was barnyardgrass, the lower layer was paddy, and the barnyardgrass landed before the rice matured. The average yield per mu was only 200kg. 80 years, farmers implement scientific farming, to 1987, the township, 5,000 mu of rice average yield 420kg, a small area of high yield reached 700-800kg. In the rice high-yield cultivation, we can see that the rice population reaches a certain limit, the field will be dark, poor ventilation and light, pests and diseases are heavy, prone to lodging and serious yield reduction. Experts point out that 90% of rice yield comes from photosynthesis products, and 90% is accumulated after heading. Accordingly, we also think of the two-story barnyard grass revelation, we started in 1983 different rice height, morning and evening cooked species according to