摘要
本文应用二次正交旋转组合设计的方法探讨了密度、氮素、单株留果枝数及缩节安化控对棉花群体内光分布动态及光合生产的影响。结果表明，密度和氮素是影响群体内光强大小及干物重高低的主要因子，７月３１日左右是棉花群体内光强的最低阶段。叶面积系数和基部相对光强有极显著负相关（ｒ＝－０．９６１３），叶面积系数保持在３．５６～３．８２，可使棉株基部光强在蕾铃脱落临界光强之上。相对临界光强为１．９２％～３．８５％。此外，开花后干物质日增量与棉株叶片的净同化率呈极显著正相关（ｒ＝０．９１８７）。
The design of the quadratic orthorgonal
rotation regression was applied to study ef-fect of four factor including density, nitrogen
fertilizer ,fruiting branch number and DPC onthe light intensity distributive dynamics and
photosynthetic production. The result showedthat nitrogen and density are main factor
controling light intensity and dry matter of cottonpopulation. The lowestphase of light intensity
appearred on July 31 or so. There are signifi-cant negative correlation between leaf area and
relative light intensity. The light intensity ofbottom plant is above limit of bud and boll
abssision when LAI keeps between 3.56 and 3.8the limit of relative light intensity is between l.
92%. Otherwise , there are significant linearpositive correlation between dry matter (g/d)after
flowering and NAR of cotton leaf.
出处
《棉花学报》
CSCD
北大核心
1995年第2期113-117,共5页
Cotton Science
关键词
棉花
栽培
光照强度
产量
cotton cultivation light intensity regression model
