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大豆科学  2009 

玉/豆套作模式下玉米播期与密度对大豆农艺性状及产量的影响

DOI: 10.11861/j.issn.1000-9841.2009.03.0439, PP. 439-444

Keywords: 玉米,大豆,套作,产量,农艺性状

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Abstract:

为完善“麦/玉/豆”新三熟模式的配套栽培技术,寻求玉豆套作体系下获取玉米、大豆共同高产的最佳玉米播期和密度;通过大田试验,采用玉米播期与密度二因素裂区设计,研究了不同玉米群体对玉/豆模式下大豆农艺性状及产量的影响。结果表明:玉米适当晚播(3月26日~4月5日)和密植(4.8~6万株hm-2)有利于玉米产量的提高;玉米早播(3月6日)与稀植(3.6万株hm-2)能降低大豆株高、增加茎粗、缩短结荚高度、增加分枝数,提高20cm~60cm层分枝荚数、粒数和60cm以上层主茎荚数与粒数,比晚播(4月15日)处理增产40.42%,比高密度(6万株hm-2)处理增产35.79%;玉米适当早播(3月6日~3月26日)和适度密植(4.8万株hm-2)有利于玉豆套作体系总产量和总产值的提高。

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