›› 2013, Vol. 21 ›› Issue (4): 714-719.DOI: 10.11733/j.issn.1007-0435.2013.04.014

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Chemical Control of Weeds in Spring-seeded Alfalfa (Medicago sativa L.) Seedling Stage

LIN Jian-hai, XU Rui-xuan, XIANG Min, ZHANG Ying-jun, LI Zhi-qiang   

  1. College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
  • Received:2012-12-31 Revised:2013-03-15 Online:2013-08-15 Published:2013-08-14

春播紫花苜蓿苗期杂草的化学防治研究

林建海, 许瑞轩, 项敏, 张英俊, 李志强   

  1. 中国农业大学动物科技学院, 北京 100193
  • 通讯作者: 张英俊
  • 作者简介:林建海(1988- ),男,福建蒲田人,硕士研究生,研究方向为杂草防治,E-mail:ljh20118888@126.com
  • 基金资助:
    中央高校基本科研业务费专项基金(2013QJ070);国家牧草产业技术体系(CARS-35);草业科学北京市重点实验室共建项目资助

Abstract: The yield and quality of alfalfa and weed control effects were investigated by the method of single factor complete randomized block design. Result showed that 2,4-DB and bentazon applied alone or mixture had a better control effect on broadleaf weeds, and control efficiency was 75.80%~90.65%. Haloxyfop-R-Methyl, quizalofop-R-methyl and clethodim had effective control on monocotyledon weeds in alfalfa field, and control efficiency were more than 71.10%. However, 2,4-DB decreased the cumulative yield of alfalfa more than 64%. While bentazon+Haloxyfop-R-Methyl, bentazon+Quizalofop-R-methyl and Haloxyfop-R-Methyl improved the yield of alfalfa harvested secondly up to 46.50%, 45.28% and 43.06%, receptively. With the comprehensive consideration of herbicide performance, bentazon+Haloxyfop-R-Methyl and bentazon+Quiza lofop-R-methyl showed better results and could be widely applied in alfalfa fields.

Key words: Alfalfa, Effects of weed control, Cumulative yield, Quality

摘要: 紫花苜蓿(Medicago sativa L.)苗期杂草危害严重,显著影响建植,为此采用单因素完全随机区组设计的方法,探究7种除草处理对苜蓿产量、品质和杂草防除效果的影响。结果表明:2,4-DB、苯达松及其混用组合处理可有效防除阔叶类杂草,株防效在75.80%~90.65%之间;高效盖草能、精喹禾灵、烯草酮可有效防除单子叶杂草,株防效高于71.10%。喷施2,4-DB会使苜蓿的总产量减少64%以上;喷施苯达松+高效盖草能、苯达松+精喹禾灵、高效盖草均能显著地提高第2茬的产量,苜蓿总产量分别提高45.60%,45.28%和43.06%。综合考虑除草剂的安全性和除杂增产效果等方面,以苯达松+高效盖草能和苯达松+精喹禾灵2种除草处理的效果较好,可在苜蓿生产田推广利用。

关键词: 紫花苜蓿, 杂草防除效果, 总产量, 品质

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