摘要： 研究发现，通用的透性常数Ks公式其原则是正确的。但在实际测定中由于取点不同会得出不同的值。如用最小二乘法处理数据会更为合理。作者在原有基础上对公式做了改进，提出一个新的公式。

关键词: 植物细胞, 原生质, 透性, 测定方法

Abstract: The experimental results from four upland cotton varieties(lines)indicated that the different positions of cotton bolls on the same plant differently affected them ain economic traits such as bollw eitht,lint percentage,seed index,and fiber length. A rulew as found for the distribution of the lower values of the traits.They were distributed on the first to third joints on the lower branches and the outer joints on the upper and middle branches.The high-er and middle values appeared mainly at the first and second joints on the middle branches .The lower values seldom appeared at the first joints on the fifth to ninth branches .

Key words: Plant cell, Protoplasm, Permeability, Method for measuring

中图分类号: 

• Q942