2种吡啶类除草剂对天山假狼毒群落影响和禾本科牧草产草量及安全性评价

摘要

The effect of different doses of triclopyr-butotyl +aminopyralid -potassium 270 g/L EW and aminopyralid 21% AS on the community of the poisonous weed Stelleropsis tianschanica in Ulu empty cover grassland of Zhaosu,Xin-jiang was studied from 2013 to 2014.The two herbicides influenced the growth of S.tianschanica community in a dose-dependent manner.Triclopyr-butotyl +aminopyralid -potassium 270 g/L EW 6 000 mL/hm2 inhibited the normal growth of S.tianschanica community with adequate selectivity to the gramineous pasture,dose-dependent increasing both its density and yield,making it a suitable chemical treatment for controlling the growth of S.tianschanica community in grasslands of Zhaosu,XinJiang.%2013—2014年在新疆昭苏县乌鲁空盖草原选用270 g／L三氯吡氧乙酸丁氧基乙酯·氯氨吡啶酸钾盐水乳剂和21％氯氨吡啶酸水剂不同浓度对草原毒草———天山假狼毒进行群落影响试验。研究结果表明，270 g／L 三氯吡氧乙酸丁氧基乙酯·氯氨吡啶酸钾盐水乳剂和21％氯氨吡啶酸水剂不同浓度均对天山假狼毒群落生长产生影响，与使用浓度呈正相关；其中使用270 g／L三氯吡氧乙酸丁氧基乙酯·氯氨吡啶酸钾盐水乳剂6000 mL／hm2明显抑制天山假狼毒群落正常生长，并且对禾本科牧草安全性较高，同时禾本科牧草数量和产草量明显增加，可作为防除天山假狼毒群落生长的化学药剂。