摘要
以陆地棉品种中棉所49号为材料,于2008-2010年在新疆阿克苏市开展了化学打顶和人工打顶的田间对比试验,研究了2种打顶方式下棉花农艺性状、冠层特征、棉铃空间分布、产量性状及纤维品质的异同点。结果表明,化学打顶后棉株高于人工打顶,但株宽、果枝长及叶枝长显著低于人工打顶,因而株型更紧凑、见絮期冠层透光性好。化学打顶棉花上部果枝结铃数和内围铃数略高于人工打顶,铃重与人工打顶的相当,衣分略有降低,子棉和皮棉产量与人工打顶相当且有增产潜力,对综合纤维品质无显著影响。
Field experiment about cotton chemical and manual detopping was conducted in Akesu（41°17′N,86°26′E）,Xinjiang,with cultivar CCRI 49 as material,from 2008 to 2010.The chemical detopping agent contained slow-released mepiquat chloride and additives,and was applied at the same time as the manual detopping in cotton.The results indicated that the plants detopped by chemical agent were taller and narrower than those detopped by hands,which resulted in more light transmittance in middle and lower layer of cotton canopy.Additionally,chemical detopping did not alter the boll weight,but reduced the lint percent slightly.The boll number per plant and yield for chemical detopping were greater than those for manual detopping in 2010,but the same as the latter in 2009.There were no significant difference in comprehensive fiber quality between chemical detopping and manual detopping.It was concluded that the chemical detopping is a potential practice to replace the manual detopping in cotton in Xinjiang.
出处
《棉花学报》
CSCD
北大核心
2011年第4期329-333,共5页
Cotton Science
基金
国家"十一五"科技支撑计划项目(2006BADB02-1)
新疆"十一五"重大专项(200731133-1)
农业部公益性行业(农业)科研专项(3-5-22)
新疆自治区高校科研计划青年教师科研启动基金(20090607111204609)
关键词
棉花
化学打顶
农艺性状
产量
纤维品质
cotton
chemical detopping
agronomic characters
yield
fiber quality
