“狼毒净”对高寒草甸狼毒防效及对牧草产量的影响  

Effect of herbicide "Langdujing" on Stellera chamaejasme control and impact on forage grass yield of alpine meadow

作　　者：刚存武[1] 王宏生[2] 李宁[1] 曾辉[2] 周青平[2] 

机构地区：[1]青海大学农牧学院,青海西宁810003 [2]青海省畜牧兽医科学院,青海西宁810003

出　　处：《草业科学》2008年第11期95-97,共3页Pratacultural Science

基　　金：青海省科技厅"草地恶性毒草--狼毒防除新剂型的研制与示范"(2006-N-518)

摘　　要：近年来,狼毒Stellera chamaejasme在青海高寒草甸上滋生蔓延,致使草地严重退化。为有效控制狼毒的危害,选用675,750,825mL/hm23个不同剂量"狼毒净",对高寒草甸狼毒防除效果进行了研究。结果表明:施药当年,各剂量"狼毒净"对狼毒的株高、投影盖度、鲜质量及干质量有一定抑制作用,但无明显防效;施药后的第2年,750和825mL/hm2剂量对狼毒的防效好,超过了94%,单子叶牧草的产量分别提高了15.24%和17.64%,双子叶牧草产量无明显变化。675mL/hm2剂量"狼毒净"对狼毒防效差,无增产效果。生产上应推荐使用750mL/hm2剂量。The rapid spread of Steltera chamaejasme is speeding up the degradation of alpine meadow in recent years. Herbicide ＂Langdujing＂ was used to control S. chamaejasme at three dosages （675 mL/ha, 750 mL/ha and 825 mL/ha）. The result showed that the height, coverage, fresh and dry weight of S. chamaejasme were inhibited by spraying Langdujing in the first year, but the control effect was not obvious. In the second year, it was applied at levels of 750 mL/ha and 825 mL/ha, the control effect was significant （94%）, meanwhile, the yield of monocotyledon forage grasses was increased by 15. 24% and 17. 64% respectively, and the yield of dicolyledon forage grass was not changed. It could be concluded that the dosage of 750 mL/ha was proper for practical application.

关 键 词：狼毒净 不同剂量 狼毒防效 牧草产量 

分 类 号：S812.6[农业科学—草业科学]