【摘要】 为了建立安徽沿江棉区机采棉种植模式,采用正交设计3套3因素3水平田间试验,研究了安徽沿江棉区机采棉优化栽培技术。结果表明,对安徽沿江棉区机采棉产量影响显著的栽培因子有品种、播期和种植密度等,DPC、N和去蕾措施等3个栽培因子对机采棉产量有不同程度的影响。综合考虑,将安徽沿江棉区机采棉栽培技术优化为:品种选用‘中棉所50’、‘机收50’等早熟品种,于5月下旬直播,播种密度为10.50万株/hm2~11.25万株/hm2,N用量为180 kg/hm2左右,DPC用量为180~270 g/hm2,施肥和化控的具体方法要结合地力、长势、天气等因素综合考虑,条件允许时可以适当去除早蕾或晚蕾以促使机采棉成铃更为集中。更多还原

【Abstract】 Based on field experiments of multi-factor orthogonal designed, machine picked cotton cultivationtechniques were studied in the area along the Yangtze River in Anhui Province, in order to establish the modeof machine picked cotton cultivation techniques in the area. The results showed that varieties, sowing date andplanting density influenced the lint yield of machine picked cotton in the area along the Yangtze Riversignificantly, and DPC, N and square removal measures influenced the lint yield to varying degrees. Machinepicked cotton cultivation techniques were optimized in the area along the Yangtze River in Anhui Province,which included that selecting of early maturing varieties, such as‘Zhongmiansuo 50’ and ‘Jishou 50’, directseeding in late May, with planting density ranging from 105000 to 112500 plants per hm2, the content of N was about 180 kg/hm2, the content of DPC ranged from 180 g/hm2 to 270 g/hm2. The specific methods of fertilizationand chemical control should consider many factors, such as soil, growth, weather, etc. If possible, the early orlate buds can be removed, in order to shorten the boll opening stage of machine picked cotton, which can bemore easily mechanized harvesting of cotton once.更多还原