一.引言关於棉花灌溉生理指標問題的研究,在農業實踐上有很重要的意義。過去在實踐上一般進行此項研究工作的是華北農業科學研究所王德彰、张雄偉、嚴文清三同志,北京水利科學院冼鼎芸同志,以及南開大學孫昌祖同學。 1)本文是实習總結報告,對材料的整理分析和提出的意見有不當之處,全由我個人負責。 I. INTRODUCTION The research on the physiological index of cotton irrigation is of great significance in agricultural practice. In the past in practice, this research work was conducted by Wang Dezhang, Zhang Xiongwei, Yan Wenqing, Third Comrade of North China Institute of Agricultural Sciences, Xian Dingyun from Beijing Water Conservancy Academy, and Sun Changzu from Nankai University. 1) This article is the internship summary report, the material analysis and the views put forward are not appropriate, all by me personally responsible.