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Influence of soybean row width and velvetleaf emergence time on velvetleaf (Abutilon theophrasti)

机译:大豆行宽和绒毛出苗时间对vel麻(abu麻)的影响

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摘要

Row spacing and the relative time of velvetleaf emergence affects the time of soybean canopy closure relative to velvetleaf, influencing the growth and development of velvetleaf. Field studies were conducted in northeastern Nebraska in 2002 and 2003 to describe velvetleaf growth as influenced by soybean presence or absence (velvetleaf grown with soybean or in monoculture), soybean row spacing (19 and 76 cm), and relative time of velvetleaf emergence. Velvetleaf seed production, leaf area (LA), and total dry matter (TDM) were greater in 76-cm- than in 19-cm-wide soybean rows. LA, TDM, and seed production of velvetleaf were reduced with later emergence times in both monoculture and with soybean. Velvetleaf LA, TDM, and seed production decreased when grown with soybean compared with when grown in monoculture. Practical implications of this study suggest that narrowing crop row spacing and controlling early-emerging velvetleaf in soybean can be an effective part of an integrated weed management strategy.
机译:行距和绒毛出现的相对时间影响大豆冠层相对于绒毛关闭的时间,影响绒毛的生长和发育。内布拉斯加州东北部于2002年和2003年进行了田间研究,描述了丝绒af的生长受大豆存在与否(用大豆种植或单种栽培的丝绒af),大豆行距(19和76 cm)以及丝绒af出苗的相对时间的影响。宽76厘米的大豆的丝绒种子产量,叶面积(LA)和总干物质(TDM)比宽19厘米的大豆行高。在单一栽培和大豆中,LA,TDM和绒毛的种子产量均随着后期出苗时间的减少而降低。与单培养相比,与大豆一起种植时,Velvetleaf LA,TDM和种子产量下降。这项研究的实际意义表明,缩小作物行距并控制大豆中的早熟丝绒可以成为综合杂草处理策略的有效部分。

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