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大豆科学  2009 

晚播对菜用大豆根系、干物质积累及鲜食产量的影响

DOI: 10.11861/j.issn.1000-9841.2009.04.0623, PP. 623-627

Keywords: 播期,干物质,鲜荚产量,菜用大豆

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Abstract:

播期是大豆高产栽培管理的重要手段。利用正常大豆播种期为对照,研究了三个相对晚播日期对菜用大豆物候期、根系、干物质及鲜食产量的影响。结果表明:晚播明显缩短生育期,播期越晚,播种到出苗的时间越短,整个生育日期越短,晚播能促进营养生长,增加苗期干物质的积累,但显著降低苗期根表面积和减少根长,根冠比下降。晚播也显著增加地上干物质的积累,6月14日播种R6期的干物重最高为:51.1g株-1。适当的晚播可有利于菜用大豆的鲜荚产量形成。6月4日和6月14日播种R6期后10d鲜荚产量最高,可作为哈尔滨地区的菜用大豆的适宜播期

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