棉花是一种喜光、喜温的短日照作物,光温条件对它的生长、发育和产量的形成有很大的影响。为了进一步了解棉花与光照条件的关系,笔者就光照条件对棉花开花期影响进行了初步研究。现将试验报告如下:一、试验设计供试品种为“沪棉204”,4月20日播种,试验密度折合每亩5,000株。试验设4个小区,每个小区面积0.0083亩,小区进行不同遮光处理。遮光材料采用白棉布。第一小 Cotton is a hi-light, hi-temperature short-day crop, light and temperature conditions on its growth, development and production have a significant impact. In order to further understand the relationship between cotton and light conditions, the author conducted a preliminary study of the light conditions on the flowering of cotton. Now the test report is as follows: First, the experimental design test varieties for the “Hu Mian 204”, April 20 planting, test density equivalent to 5,000 per acre. Experimental set up four plots, each plot area of ​​0.0083 acres, the district for different shading treatment. Shading material with white cotton. The first small