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应用二次回归通用旋转组合设计,研究施磷量、间苗叶龄、密度和施氮量4项栽培措施对谷子叶片光合效率(用净同化率表示)的影响。其结果表明,增加施磷量和施氮量,合理密植,提早间苗,有利于提高谷子叶片光合效率,促进干物质积累,为高产奠定物质基础。
The quadratic regression general rotation combination design was used to study the effects of four cultivation measures of phosphorus application, seedling leaf age, density and nitrogen application rate on the photosynthetic efficiency (expressed as net assimilation rate) of millet leaves. The results showed that increasing the amount of phosphorus and nitrogen application, close planting, early seedling, is conducive to improving photosynthetic efficiency of millet leaves, and promote the accumulation of dry matter, laying the material foundation for high yield.