中文摘要：

本文通过研究棉花根系生长,通过建立logistic方程模型求出拐点、描述其增长规律,并在此基础上分析Logistic方程的统计意义和生产现实意义。试验结果为根系生长提出相应的改善措施,也为其他农业生产规律研究提供参考和依据。

英文摘要：

Through the study of root growth based on logistic function,this paper calculated the inflection point of logistic function and described the growth rule of cotton root, and then analyzed the statistics significance and agricultural reality significance. The results showed relevant methods to improve the root growth and provided a reference to other agricultural production.