本研究是国家“八·五”攻关课题。主攻目标:亩产皮棉150kg。现将研究结果初报如下。 1.开心栽培技术增产机理首先,调节棉花生长发育进程,控制主茎的纵向生长,促进叶枝发育,使营养生长期延长,生殖生长期集中。一般7月底前单株总果节数达60个,使生殖生长高峰处在雨热同期的8月份,利于铃重的提高;其次,打破顶端优势,改变有机营养运输方向,协调地上与地下,营养生长同生殖生长矛盾;第三,改善棉田风光条件,增加了有效光合面积。棉株开心后,株高降低,叶枝侧向生长,主茎的4个果枝处于风光条件较好的顶部,叶枝上果枝处于通风状况良好的 This study is the national “eight five” key issue. The main target: 150kg of lint per mu. The results of the first report is as follows. 1. Happy cultivation techniques to increase production mechanism First, the regulation of cotton growth and development process, control the vertical growth of the main stem to promote leaf development, so that vegetative growth period, the reproductive growth period of focus. Generally the end of July before the total number of segments per plant up to 60, so that reproductive growth peak in rainy season in August, conducive to the improvement of boll weight; Secondly, to break the top edge, change the direction of organic nutrition transport, coordination of aboveground and underground, Vegetative growth and reproductive growth contradictions; third, to improve the cotton field conditions, an increase of effective photosynthetic area. When the cotton plants were happy, the plant height was reduced and the lateral growth of the leaf branches was observed. The four fruit branches of the main stems were at the top with good scenery conditions. The branches of the branchlets were in a well ventilated condition