摘要： 1991～1993年通过大田试验，对棉花不同群体干物质在各器官的积累与分配规律进行了曲线拟合。结果表明，各器官干物质积累均呈不同程度偏斜的S形曲线，而棉株干物质在各器官间分配规律则因器官的不同各有不同。根、果枝及果枝叶呈抛物线形曲线，主茎为y=axe^bx形曲线，主茎叶为y=（a+bx）/x形曲线；蕾为“钟形”曲线，铃呈Logistic曲线。此外，对群体密度的影响也进行了探讨，在试验密度范围内，群体密度的影响主要表现在干物质积累量上，对各器官的积累与分配规律的影响无明显差异。

关键词: 棉花, 干物质, 积累, 分配, 群体密度, 数学模型

Abstract: Based on field experimental data collected from 1991-1993,dry matter distribution ratio simulating models for different cotton organs were developed.Results showed that dry matter accumulation models in different organs were S shape curve,while dry matter distribution ratio were different in cotton organs.In root,fruit branch and branch leaves,the dry matter distribution ratio model is y=c+bx+ax²,in cottonstem,the model is y=axe^bx ,in stem leaves,the model is y =(a+b x)/x,in bud,the model is y=ae bx^2 ,and in boll,the model is Logistic function.Besides,the paper had discussed the effects of population density of cotton,which mainly affected the amount of dry matter accumulation,the effect on the dry matter distribution ratio for different organs was not significant.

Key words: Cotton, Dry matter accumulation and distribution, Population density, Mathematical model

中图分类号: 

• S562