科尔沁沙地苜蓿苗期除草剂的筛选  

Herbicide Selection of Alfalfa Seedling Stage in Horqin Sandy Land

作　　者：荆照 曹倩[1] 宁亚明[1] 常媛飞 张玉霞[2] 周岩 达布希拉图 王显国[1] JING Zhao;CAO Qian;NING Ya-ming;CHANG Yuan-fei;ZHANG Yu-xia;ZHOU Yan;DA-BU-XI-LA-TU;WANG Xian-guo(College of Grassland Science and Technology,China Agricultural University,Beijing 100193,China;College of Agronomy,Inner Mongolia University for Nationalities,Tongliao,Inner Mongolia 028000,China;Inner Mongolia Yanfeng Agricultural Biotechnology Co.,Ltd.,Chifeng,Inner Mongolia 024000,China;Ar Horqin Banner DBXLY Co.,Ltd.,Chifeng,Inner Mongolia 025550,China)

机构地区：[1]中国农业大学草业科学与技术学院,北京100193 [2]内蒙古民族大学农学院,内蒙古通辽028000 [3]内蒙古岩峰农业生物科技有限公司,内蒙古赤峰024000 [4]阿鲁科尔沁旗达布希绿业有限责任公司,内蒙古赤峰025550

出　　处：《草地学报》2020年第1期259-267,共9页Acta Agrestia Sinica

基　　金：国家公益性行业(农业)科研专项(201403048-2)资助

摘　　要：本研究通过在紫花苜蓿(Medicagosativa L.)四个不同叶期施用除草剂,来探索不同除草剂对苜蓿产量和杂草防控效果的影响。结果表明:高效氟吡甲禾灵可以分别和咪唑乙烟酸、苯达松、辛酰溴苯腈安全混用,且不会显著降低对燕麦(Avena sativa L.)的防效;咪唑乙烟酸对反枝苋(Amaranthus retroflexus L.)的鲜重防效较好,为30%~90%。不同除草剂适宜施用时期不同,咪唑乙烟酸适宜在3叶期施用,苜蓿的产量高达1666 kg·hm-2;辛酰溴苯腈与高效氟吡甲禾灵在5叶期混用,苜蓿的产量高达1656 kg·hm-2。科尔沁沙地苜蓿苗期适宜化学除草方法为:针对禾本科与阔叶杂草并存地块,应在苜蓿3叶期,施用咪唑乙烟酸1050 mL·hm-2+高效氟吡甲禾灵600 mL·hm-2;针对禾本科杂草为主的地块,应在苜蓿3~5叶期,单独施用高效氟吡甲禾灵600 mL·hm-2。The effects of different herbicides on alfalfa(Medicago sativa L.)yield and weed control were explored by applying herbicides at four different leaf stages.The results showed that haloxyfop-P-methyl could be safely mixed with imazethapyr,bentazone or bromoxynil octanoate without affecting the control effect on oat(Avena sativa L.);the control effect of imazethapyr against redroot pigweed(Amaranthus retroflexus L.)fresh weight was 30%~90%.The efficiency of herbicides depends on application time.Alfalfa yield was as high as 1666 kg·hm-2,when Imazethapyr was applied at three-leaf growth stage;When bromoxynil octanoate was mixed with haloxyfop-P-methyl at five-leaf stage,and the alfalfa yield was as high as 1656 kg·hm-2.During the three to five-leaf stage,1050 mL·hm-2 imazethapyr+l 600 mL·hm-2 haloxyfop-P-methy,or application of 600 mL·hm-2 haloxyfop-P-methyl alone is recommended.

关 键 词：苜蓿 苗期 除草剂 产量 防效 

分 类 号：S963.223.3[农业科学—水产养殖]