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Weed growth and crop yield loss in wheat as influenced by row spacing and weed emergence times

机译:由于行间距和杂草出现时间的影响,小麦的生长和作物产量损失

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摘要

Reducing crop row spacing and delaying time of weed emergence may provide crops a competitive edge over weeds. Field experiments were conducted to evaluate the effects of crop row spacing (11,15, and 23-cm) and weed emergence time (0, 20, 35, 45, 55, and 60 days after wheat emergence; DAWE) on Galium aparine and Lepidium sativum growth and wheat yield losses. Season-long weed-free and crop-free treatments were also established to compare wheat yield and weed growth, respectively. Row spacing and weed emergence time significantly affected the growth of both weed species and wheat grain yields. For both weed species, the maximum plant height, shoot biomass, and seed production were observed in the crop-free plots, and delayed emergence decreased these variables. In weed crop competition plots, maximum weed growth was observed when weeds emerged simultaneously with the crop in rows spaced 23-cm apart. Less growth of both weed species was observed in narrow row spacing (11-cm) of wheat as compared with wider rows (15 and 23-cm). These weed species produced less than 5 seeds plant(-1) in 11-cm wheat rows when they emerged at 60 DAWE. Presence of weeds in the crop especially at early stages was devastating for wheat yields. Therefore, maximum grain yield (4.91 t ha(-1)) was recorded in the weed-free treatment at 11-cm row spacing. Delay in time of weed emergence and narrow row spacing reduced weed growth and seed production and enhanced wheat grain yield, suggesting that these strategies could contribute to weed management in wheat. (C) 2015 Elsevier Ltd. All rights reserved.
机译:减少杂草出苗的作物行间距和延迟时间可以在杂草中提供竞争优势。进行现场实验以评估作物行间距(11,15和23厘米)和杂草出苗时间(0,25,35,55,55和60天后小麦出现的效果; DAWE)对加拉丝和Lepidium sativum生长和小麦产量损失。还建立了季节长途无杂草和无作物治疗,以比较小麦产量和杂草生长。行间距和杂草出苗时间显着影响了杂草物种和小麦籽粒产量的增长。对于杂草种类,在无作业的地块中观察到最大植物高度,芽生物质和种子产生,并且延迟出现降低了这些变量。在杂草作物竞争地块中,当杂草同时出现的作物间隔23厘米的作物同时出现时,观察到最大杂草增长。与较宽的行(15和23厘米)相比,在窄的行间距(11厘米)的小麦中观察到两种杂草种类的增长。这些杂草物种在6厘米的小麦行中产生了少于5种种子植物(-1),当时在60张Dawe中出现。杂草在作物中的存在尤其是早期阶段的小麦产量造成破坏性。因此,在11cm行间距的无杂草处理中记录了最大谷物产量(4.91 t ha(-1))。杂草出现和狭窄的行间距延迟减少杂草生长和种子生产,提高小麦籽粒产量,这表明这些策略可能导致小麦的杂草管理。 (c)2015 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Crop Protection》 |2015年第null期|共8页
  • 作者单位

    Huazhong Agr Univ Coll Plant Sci &

    Technol Natl Key Lab Crop Genet Improvement MOA Key Lab Crop Ecophysiol &

    Farming Syst Middle Wuhan 430070 Hubei Peoples R China;

    Huazhong Agr Univ Coll Plant Sci &

    Technol Natl Key Lab Crop Genet Improvement MOA Key Lab Crop Ecophysiol &

    Farming Syst Middle Wuhan 430070 Hubei Peoples R China;

    Univ Queensland Queensland Alliance Agr &

    Food Innovat Toowoomba Qld 4350 Australia;

    Northeast Agr Univ Dept Hort Harbin 150030 Peoples R China;

    Huazhong Agr Univ Coll Plant Sci &

    Technol Natl Key Lab Crop Genet Improvement MOA Key Lab Crop Ecophysiol &

    Farming Syst Middle Wuhan 430070 Hubei Peoples R China;

    Khyber Paktunkhwa Agr Univ Peshawar 25000 Pakistan;

    Huazhong Agr Univ Coll Plant Sci &

    Technol Natl Key Lab Crop Genet Improvement MOA Key Lab Crop Ecophysiol &

    Farming Syst Middle Wuhan 430070 Hubei Peoples R China;

    Khyber Paktunkhwa Agr Univ Peshawar 25000 Pakistan;

    Huazhong Agr Univ Coll Plant Sci &

    Technol Natl Key Lab Crop Genet Improvement MOA Key Lab Crop Ecophysiol &

    Farming Syst Middle Wuhan 430070 Hubei Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 病虫害及其防治;
  • 关键词

    Row spacing; Days after wheat emergence; Galium aparine; Lepidium sativum; Weed emergence time; Yield losses;

    机译:行间距;小麦出现后的天;加里姆利阿拉丝;尿液肝;杂草出苗时间;产量损失;

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