春播紫花苜蓿苗期杂草的化学防治研究  

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

作　　者：林建海[1] 许瑞轩[1] 项敏[1] 张英俊[1] 李志强[1] 

机构地区：[1]中国农业大学动物科技学院,北京100193

出　　处：《草地学报》2013年第4期714-719,共6页Acta Agrestia Sinica

基　　金：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

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。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 mix- ture had a better control effect on broadleaf weeds, and control efficiency was 75.80~90.65%. Haloxy- fop-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 if-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, bentazonq-Haloxy- fop-R-Methyl and bentazon＋Quiza lofop-R-methyl showed better results and could be widely applied in al- falfa fields.

关 键 词：紫花苜蓿 杂草防除效果 总产量 品质 

分 类 号：S451.23[农业科学—植物保护] S481.9