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中国农学通报 ›› 2017, Vol. 33 ›› Issue (15): 15-20.doi: 10.11924/j.issn.1000-6850.casb16080150

所属专题: 油料作物

• 农学 农业基础科学 • 上一篇    下一篇

酸模叶蓼对大豆生长的影响及其经济阈值

董莉环,崔 娟,吴 磊,史树森   

  1. 辽宁省本溪市桓仁县农业技术推广中心 辽宁桓仁,吉林农业大学农学院 吉林长春,长春市农业技术推广站,吉林农业大学农学院 吉林长春
  • 收稿日期:2016-08-31 修回日期:2016-11-30 接受日期:2016-12-23 出版日期:2017-05-26 发布日期:2017-05-26
  • 通讯作者: 董莉环
  • 基金资助:
    现代农业产业技术体系建设项目“国家大豆产业技术体系建设”(CARS-04)。

Effects of Polygonum lapathifolium on Soybean Growth and Its Economic Threshold

  • Received:2016-08-31 Revised:2016-11-30 Accepted:2016-12-23 Online:2017-05-26 Published:2017-05-26

摘要: :酸模叶蓼是大豆田的恶性杂草,严重危害大豆生长发育及产量,为明确酸模叶蓼在大豆田中的经济危害允许水平和经济阈值,在大田条件下采用添加系列试验和拟合函数关系模型的方法,研究了酸模叶蓼与大豆的竞争关系。结果表明,在酸模叶蓼的竞争干扰下,大豆单株荚数,产量均随酸模叶蓼密度的增加而逐渐降低,而株高没有显著变化。线性函数模型y=-0.443x 39.453 (R2=0.962,F=75.887,P=0.003)能较好地拟合酸模叶蓼对大豆单株荚数的影响;二次曲线函数模型y=0.702x2-54.395x 3027.810(R2=0.972,F=34.843,P=0.028)能较好地拟合大豆产量与酸模叶蓼密度之间的关系,对数函数y=16.131lnx-23.458 (R2=0.911,F=20.532,P=0.045)能较好的拟合大豆产量损失与酸模叶蓼密度之间的关系。大豆田酸模叶蓼人工拔除的经济阈值为10.22 株/m2,使用75%噻吩磺隆水分散粒剂、80%阔草清水分散粒剂、95%精异丙甲草胺乳油防除的经济阈值分别为4.75、5.03、5.25 株/m2。酸模叶蓼对大豆产量有明显影响,通过对经济阈值分析,在大豆田化学除草剂防治酸模叶蓼具有明显的经济优势。

关键词: 植物抗病性, 植物抗病性, 植物代谢, 次生代谢, 代谢产物, 代谢途径

Abstract: Polygonum lapathifolium L. is a troublesome weed seriously damaging soybean growth and reducing soybean yield in soybean fields. To determine economic infestation level and economic threshold of P. lapathifolium in soybean fields,a field experiment was carried out to study the effects of P. lapathifolium of different densities (0, 10, 20, 30 and 40 plant/m2 ) on the soybean growth and yield by the method of additive series experiment. [Result] Results showed that increasing density of P. lapathifolium significantly reduced soybean’s pods per plant and yield. There was no significant impact on soybean plant height.The linear function model was the best in describing the relationship between P. lapathifolium density and soybean’s pods per plant as y = -0.443x 39.453(R2=0.962;F=75.887;P=0.003); While the quadratic regression model as y=3027.810x2-54.395x 0.702(R2=0.972;F=34.843;P=0.028) was better for describing the relationship between P. lapathifolium as y=-23.458lnx 16.131(R2=0.9112;F=20.532;P=0.045) density and soybean yield; while the logarithmic regression model was better for describing the relationship between P. lapathifolium density and yield loss. Economic threshold of P. lapathifolium control was 1.42 plants /m2 for manual weeding , while for the chemical herbicides of 75% thifensulfuron WG, 80% flumetsulam WG,95% s-metolachlor EC were 1.88,1.82 and1.77 plants /m2, respectively. S[Conclusion] Herbicide application effectively and economically controlled P. lapathifolium in soybean fields.