贵州主要耕作制度对胜红蓟发生危害的影响

为探索贵州主要耕作制度与胜红蓟入侵危害相关性，选择贵州主要入侵区域田块进行3年定点跟踪监测。结果表明，监测田块杂草发生种类有51种，以胜红蓟田间盖度、相对多度最高，田间盖度值为50.03～66.54,3年平均值为59.11，相对多度值为36.98～59.59,3年平均值为46.27，其发生危害远大于其他杂草，且发生危害总体保持在稳定状态。田间耕作制度长期保持单一耕作管理模式有利于胜红蓟的发生危害，建议在农业生产上适时改变耕作制度，增加更多的田间管理方式控制胜红蓟入侵危害。

Effect of Main Farming Systems in Guizhou on the Occurrence and Damage of Ageratum conyzoides

To explore the correlation between the main farming systems and the invasive damage of Ageratum conyzoides in Guizhou, the main invasion areas were selected for 3-year fixed-point tracking monitoring. The results showed that there were 51 species of weeds in the monitored fields, and A. conyzoides had the highest field coverage and highest relative abundance, its value of field coverage ranged from 50.03 to 66.54 with the 3-year average value of 59.11, and its relative abundance ranged from 36.98 to 59.59 with the 3-year average of 46.27. The damage of A. conyzoides in Guizhou was much greater than that of other weeds, and its damage remained stable in general. A long-term single farming management mode could result in the occurrence and damage of A. conyzoides. Therefore, it is suggested that the farming system should be changed in time in agricultural production, and more field management methods should be adopted to control the invasion and damage of A. conyzoides.