扁穗牛鞭草人工草地中空心莲子草杂草防除效果研究

A Study on Weed Control of Alternanthera philoxeroides in the Artificial Pasture of Hemarthria compressa.

利用水花生净除莠剂可有效地防除扁穗牛鞭草人工草地中的杂草空心莲子草,平均株防效达26.7%～99.8%,并且在较高防效下药剂对扁穗牛鞭草较为安全。在空心莲子草杂草生长盛期,14%的水花生净乳油以浓度为675ml/hm2～900ml/hm2、各处理对水600ml的防除效果最佳,可达到100%。综合考虑,以525ml/hm2～675ml/hm2的浓度为宜。

A study was carried out by spraying a herbicide on the Alternanthera philoxeroides in the artificial pasture of H.compressa cv.'Guangyi'.Compared with CK,the herbicide made the weed control effect up to 26.7%～99.8% and it was safe for H.compressa cv.'Guangyi'under high weed control effect.According to the different field trials,the weed control effect was excellent up to 100% with a dosage of 675～900ml/hm2 and water volume being 600ml.The weed control effect is above 90% with a dosage of 525～675ml/hm2.