实践证明,棉花密植有下述几项好处:成熟早,结桃集中,产量高,品质好,如栽培管理得当,可以省工省肥、省农药、降低生产费用,提高劳动生产率,但也还存在一些问题,如密植棉株杆细,叶小、花小、桃小、肥多蕾期易疯长,肥少后期易早衰等。为了对这些问题作比较深入的研究,73年我们对施肥方法和施肥量进行了研究,现将研究结果初报如后: Practice has proved that the close planting of cotton has the following advantages: early maturity, peach concentration, high yield, good quality, such as cultivation and management properly, you can save labor and fertilizer, provincial pesticides, reduce production costs, improve labor productivity, but also There are some problems, such as dense cotton plant rod thin, small leaves, flowers small, small peach, fat Duolei crazy so long, early fat less prone to premature aging and so on. In order to conduct a more in-depth study of these issues, we conducted 73 years of fertilization methods and fertilizer research, the results of the first report is as follows: