作物研究Issue(5)：489-492,4.DOI:10.3969/j.issn.1001-5280.2015.05.08
施氮量、种植密度和播种期对棉花干物质积累与分配的影响
Effects of Nitrogen FertiIization,PIanting Density and Sowing Date on the Dry Matter AccumuIation and Distribution of Cotton
摘要
Abstract
Cotton is one of primary economic crops in our country and has an important role in national economy.The dry matter accumulation is one of the important indicators which affect the yield and fiber quality of cotton.The objective of the present study was to investigate the effects of nitrogen fertilization,planting density and sowing date on the dry matter accu-mulation and distribution of JX0010.The results showed that the dry matter accumulation in vegetative organs,reproductive organs and population of aboveground parts were similar to “S”curve.With the advance of plant birth process,the propor-tion of the dry matter accumulation in vegetative organs reduced,while genital proportion gradually increased in dry matter distribution coefficient.The main determinant factor of the population dry matter accumulation was planting density.The speed of the population dry matter accumulation was the highest and reached 188.25 kg/(hm2 ·d)with the treatment of the nitrogen fertilization was 225 kg/hm2 ,the planting density was 82 500 plants per hectare and the sowing date was on May 20.关键词
棉花/施氮量/种植密度/播种期/干物质Key words
cotton/nitrogen/planting density/sowing date/dry matter分类
农业科技引用本文复制引用
代英男,马一学,阳会兵,陈金湘,白玉超..施氮量、种植密度和播种期对棉花干物质积累与分配的影响[J].作物研究,2015,(5):489-492,4.基金项目
湖南省现代农业产业技术体系项目（湘农业联［2012］278号）。 （）
