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Wheat-weed interactions at variable seeding rates in organic farming systems.

机译:有机耕作系统中不同播种速率下的小麦-杂草相互作用。

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摘要

Many organic producers seed spring wheat (Triticum aestivum L.) at higher rates than conventionally recommended. By increasing seeding rate, the crop is expected to become a stronger competitor against weeds. A two-year study assessed the response of spring wheat to variable seeding rates (1X conventional, 1.25X, 1.5X and 2X) in a plot experiment in Nova Scotia and on organic farms across Canada. Weed biomass and weed nitrogen uptake was reduced at higher wheat seeding rates. Weed suppression corresponded with an increase in light interception at higher seeding rates midseason, as well as increased crop height and biomass and accelerated maturity. Highest yield was obtained at a double seeding rate in 2003 and at the 1.25X, 1.5X and 2X seeding rates in 2004, although crop plant density was similar at these rates due to poor emergence in 2003. On organic farms, a 1.25X seeding rate was sufficient to maximize yield.
机译:许多有机生产者以比常规建议更高的播种量播种春小麦(Triticum aestivum L.)。通过提高播种率,预计该作物将成为对抗杂草的更强竞争者。一项为期两年的研究在新斯科舍省和加拿大各地的有机农场进行的田间试验中评估了春小麦对不同播种量(常规播种量的1倍,常规1.25倍,1.5倍和2倍)的响应。在较高的小麦播种率下,杂草生物量和杂草氮吸收量降低。杂草抑制与在中期播种时较高的播种率下光的截获量增加,作物高度和生物量的增加以及成熟的加快相对应。在2003年以双倍播种速率获得最高产量,在2004年以1.25倍,1.5倍和2倍播种率获得最高产量,尽管由于2003年出苗率不高,作物密度在这些速率下是相似的。在有机农场中,以1.25倍播种率足以最大化产量。

著录项

  • 作者

    Beavers, Roxanne L.;

  • 作者单位

    Dalhousie University (Canada).;

  • 授予单位 Dalhousie University (Canada).;
  • 学科 Agriculture Agronomy.
  • 学位 M.Sc.
  • 年度 2005
  • 页码 156 p.
  • 总页数 156
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农学(农艺学);
  • 关键词

  • 入库时间 2022-08-17 11:42:06

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