摘要
本文就不同生态型7.8万亩1200块棉种繁殖田按归类随机任择120块,调查密度、肥料、化控三因子的交叉配合对棉种产量的影响,采用回归和聚类分析的方法加以归结和验证,旨在探讨大面积生产中密、肥、控对棉种产量的互作效应、发展趋向及其应用规律。在确立最佳繁殖体系的同时,进一步寻求密、肥、控的最适运筹点,以回归方程的形式予以表达。研究结果对大面积棉种高产、稳产、高效、低耗繁殖具有切实可行的参考价值。
In cotton seed multiplication on a large scale,There is the trond that the higher the good the of planting density,fertilizers and chemical sprays.Thus caused the problem of higher production cost,fluctuation of the seed yield and more risks.It is so,necessary to find the multiplication system that is the best combination of plant density fertilizersand chemical con- trol for seed multiplication at the present countryside production condition.The purpose of the present study is to investigate the interaction of such three factors,by method of curvilinear re- gression and clustering analysis on 120 multiplicating plots randomly selected from 1200 vari- ous ecotype plots totalled 78000 mu.Our research is of valuable reference for the higher and stable yield,higher economic benefit and low production cost for cotton seed multiplication on a larger acrage.
出处
《棉花学报》
CSCD
北大核心
1991年第2期45-51,共7页
Cotton Science
关键词
棉花
良种繁育
聚类分析
Cotton cuhivar
Multiplication system (Density-fertilizer-chemical control)
Curvilinear regression
Clustering analysis
