摘要
通过田间试验研究了不同种植密度（1.8万-5.4万株/hm^2）对抗虫杂交棉中棉所75生长发育、产量及产量构成因素的影响。结果表明：随着种植密度的增大,棉花的全生育期会略缩短,株高先降低然后略增高,单株干物重、总果节数和单株果枝台数均减少,而单位面积总干物重却增加;随着密度的增大,棉株成铃向上部、向内围集中,而且单株成铃数明显减少,铃重、单位面积总铃数和单位面积籽棉产量均呈先增加后减少的趋势,而霜前花率则呈上升的趋势;最适宜的种植密度为3.6万株/hm^2,此时籽棉产量最高,达4292.0 kg/hm^2。
The effects of different planting densities（ 18000 - 54000 plant /hm^2） on the growth,development,yield,and yield components of hybrid insect- resistant cotton variety Zhongmiansuo 75 were studied through filed tests. The results indicated that：when plant density increased,the whole growth and developmental duration of cotton shortened,plant height decreased firstly and then slightly increased,dry matter weight per plant,total fruit- branch node number,and fruit- branch number per plant reduced,while total dry matter weight per unit area increased. As plant density rose,the boll formation concentrated towards the upper part and inner of cotton plants,the number of bolls per plant decreased significantly,the boll weight,total boll number per unit area and unginned cotton yield per unit area all increased firstly and then decreased,and the rate of pre- frost flowers showed a rising trend.The optimum planting density of Zhongmiansuo 75 in coastal area was 36000 plant /hm^2,and the highest unginned cotton yield4292. 0 kg /hm^2 could be obtained under this condition.
出处
《江西农业学报》
CAS
2014年第9期27-30,共4页
Acta Agriculturae Jiangxi
基金
转基因生物新品种培育重大专项(2012ZX08013007-003)
江苏省农业科技自主创新资金项目[CX(12)3068]
国家星火计划(2012GA690331)
关键词
棉花
种植密度
生长发育
产量
产量构成因素
Cotton
Planting density
Growth and development
Yield
Yield components
作者简介
王海洋（1970-），男，副研究员，主要从事棉花和特种经济作物新品种引进与栽培技术研究。
