密度、肥料和化学控制对棉种产量的影响  

Combined Effects of Planting Density , Nitrogen Fertilizer and Mepiquat Chloride on Cotton Seed Yield

作　　者：任颐[1] 宋钦炎 张敬之[1] 王天时[1] 胡志明 景余俊 周学明 臧存芳 

机构地区：[1]江苏省东台市种子公司 [2]东台市海堰城东乡农科站

出　　处：《江苏农业学报》1991年第S1期11-16,共6页Jiangsu Journal of Agricultural Sciences

摘　　要：在扛苏省东台市里下河、通榆线、沿海三个棉种繁殖区,分层随机抽取120块田,调查密度、肥料和化学控制对棉种产量的影响。采用聚类和回归分析的方法寻求密、肥、控的最适运筹点。研究结果对大面积棉种高产、稳产繁殖具有一定参考价值。In commercial multiplication of cotton cultivars,it should be noticed that increases in planting density and the application of fertilizers and chemicals may lead to increases in production cost,management risks and unstableness of seed yield and quality. The purpose of the present study was to find out a better combination of these three agronomic factors. Data of 120 multiplicating plots randomly drawn from 3 ecotype regions in Dongtai City were used to carry out curvilinear regression and clustering analysis. The optimal operational points of the three factors for each of the three ecotype regions were obtained ,tested and appraised.

关 键 词：棉花 种子繁殖 密度 肥料 化控 曲线回归 聚类分析 

分 类 号：S[农业科学]