LI Jian-dong,HU Ji-ning,YIN Ping-ping,et al.Effect of Ambrosia Trifida Planting Density on Soybean under the Conditions of Different Fertility[J].Soybean Science,2010,29(02):280-283.[doi:10.11861/j.issn.1000-9841.2010.02.0280]
不同肥力条件下三裂叶豚草的密度对大豆生长发育的影响
- Title:
- Effect of Ambrosia Trifida Planting Density on Soybean under the Conditions of Different Fertility
- 文章编号:
- 1000-9841（2010）02-0280-04
- Keywords:
- Fertility; Density; Ambrosia trifida; Soybean; Competition
- 分类号:
- S565.1
- 文献标志码:
- A
- 摘要:
- 为探究三裂叶豚草对大田旱生作物的危害表现，利用添加系列试验设计，研究不同肥力条件下，三裂叶豚草不同密度处理对大豆生长发育的影响。结果表明：在大豆整个生长季中，三裂叶豚草对大豆的株高、分枝生长均存在显著的抑制作用，这一作用突出表现在大豆的生长前期，在分枝期，未施肥条件下混生种群各处理大豆株高显著高于大豆单生种群。分枝数和分枝长度变化规律与株高相反，随着豚草密度的增加表现为先降低后增加的趋势，另外，在混生种群施肥条件下大豆的株高反而低于未施肥条件下各处理，表明三裂叶豚草不仅在光竞争中对大豆存在抑制作用，在争夺水分、肥料方面也表现出强大的竞争能力。大豆地上部分生物量，在分枝期和结荚期均随着豚草密度的增加而降低。
- Abstract:
- The objective of this study was to discusse the disadvantage of giant ragweed(Ambrosia trifida) to crops in dry land farming. In different fertility level, the effects of giant ragweed competition on morphological character, yield character of soybean were studied. The results showed that in the whole soybean growing season, Ambrosia trifida had a significant inhibition on height and branch of soybean, especially in the early growth stage. In no fertilization condition, plant height in mixed populations was significantly higher than that of soybean monoculture population. As the increasing of giant ragweed density, branch number and branch length showed decrease and then increase trend, which was contrary to plant height.In addition, in mixed populations under the conditions of fertilization, the height of the soybean was lower than the unfetilizated,which can explain that Ambrosia trifida has inhibition on soybean not only in the light also for water, fertilizer aspects.The soybean biomass above the ground decreased when the density of trifida increased at branching and podding stage.
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备注/Memo
基金项目：辽宁省教育厅高等学校创新团队科研资助项目（2009T088）。