摘要
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。
A regression method of common conic substitution was used to study effects of the agro-nomic practices on leaf net photosynthetic assimilation rate of millet (Setaria italica Beauv)The agronomic practices included application amount of phosphorus,thinning of seedlings,plant density control.It was concluded from the research that properly increased phosphorusand nitrogen application,reasonable plant density and earlier thinning of seedlings are condu-cive to the improvement of leat photosynthetic assimilation rate and dry matter accumulationand lay a material foundation for obtaining high yield.
关键词
谷子
叶片
光合效率
栽培
millet
common conic substitution design
agronomic practices
leaf net photo-synthetic assimilation rate
