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 Fertilization,Planting Density and Sowing Date on the Dry Matter Accumulation and Distribution of Cotton

作　　者：代英男[1] 马一学[1] 阳会兵[1] 陈金湘[1] 白玉超[1] 

机构地区：[1]湖南农业大学棉花研究所,长沙410128

出　　处：《作物研究》2015年第5期489-492,共4页Crop Research

基　　金：湖南省现代农业产业技术体系项目(湘农业联[2012]278号)

摘　　要：以JX0010为材料,研究了施氮量、种植密度和播种期对棉花干物质积累与分配的影响。结果表明:棉花地上部分营养器官干物质、生殖器官干物质、单株干物质和群体干物质变化趋势均呈"S"型曲线。随着生育进程的推进,营养器官干物质所占比重降低,生殖器官所占比重逐渐升高。密度是影响群体干物质积累的主要因子,以施氮量225 kg/hm2、密度82 500株/hm2、播期5月20日处理的群体干物质积累速度最大,达到了188.25kg/(hm2·d)。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 

分 类 号：S562.04[农业科学—作物学]