地处我国中亚热带红壤丘陵区的江西省永修县艾城牛场,在“七五”期间建立人工草场近2000亩,由于耕作,管理,利用诸方面原因,草地产量及质量大幅度下降,杂草侵染尤为严重。要更新,复壮草地,除杂是关键措施之一。调查发现,豚草是当地建立饲草料基地,需要防除的首要草本杂草。除了水田、水 It is located in Aicheng cattle farm, Yongxiu County, Jiangxi Province, in the middle subtropical red soil hilly region. Nearly 2,000 mu of artificial grassland was established during the “7th Five-Year Plan” period. The yield and quality of grassland greatly decreased due to various reasons of farming, management and utilization. Grass infection is particularly serious. To update, rejuvenate the grass, cleaning is one of the key measures. The survey found that ragweed is the site of the establishment of forage grass, the need to control the primary herbaceous weeds. In addition to paddy fields, water