调控技术对新疆棉花形态诊断指标影响研究

Studies on the Effects of Different Technology of Regulating and Controlling on the Cotton Index of Shape Diagnosing in Xinjiang

主要研究了新疆棉田的密度、缩节安化控、追施氮肥、揭膜与灌水间隔期等调控技术对棉花的主茎日增长量、株高、倒 4叶宽、叶面积系数等形态诊断指标的影响。结果表明 ,北疆适宜的收获株数每公顷为 2 4万株 ,南疆每公顷为 2 1万株 ;缩节安用量北疆为 1 50 g·hm- 2 ,南疆为 1 75g·hm- 2 ;中等肥力土壤施尿素量 750kg·hm- 2 ;揭膜与灌水间隔期为 3～ 7d。

This paper studies of the cotton stem height, growth of the c otton stem every day, the leaf area index(LAI), the NO.4 leaf width from cotton top in different density, DPC, nitrogen, etc. in Xinjiang.The suitable harvest density is 2.4×10 5 plants·hm -2 in north Xinjiang and 2.1×10 5 plants ·hm -2 in south Xinjiang,the DPC application is 150 g·hm -2 in north Xinjiang and 175 g·hm -2 in south Xinjiang, the chem. application is 750 kg·hm -2 in medium fertility of soil.