水稻高产优化栽培模式

水稻高产群体是一个高度的自动调节系统,但调节能力有限。高产栽培应穗粒兼顾。产量及其构成因素与处理因子间存在着因果关系,一般呈二次曲线。生育期间群体积累的干物质较多,谷草比较大是高产的物质基础。提高产量主要依靠增加后期光合势、干物质积累和谷草比。各项栽培措施相互配合,寻求最优组合,可收到既高产又经济的效果。

Studies on Optimized Model for High--yielding Rice Cultivation

Experimental results showed that high-yielding rice plant population was a system of high degree of automatic regulation. In high-yielding rice cultivation, attention should be paid to both the number of panicles per unit area and the number of ripened grains per panicle. Besides yield components, there was a fixed causality relationship between grain yield and treatment factors. In general, grain yield and its components responded in quadratic curves. The physical basis for high-yielding cultivation was that there should be more dry matter accumulation in growth period and that grain-straw ratio should be high. Maximization of grain yield depended mainly on raising the photosynthetic potential and dry matter accumulation in late growth stage and on increasing the grain-straw ratio. Better economical results as well as higher grain yield could be obtained by coordinating cultural measures and seeking optimum combinations.