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通过调查云南省曲靖市朗目山近几年所建植的各龄人工草地主要杂草的发生情况 ,找出了杂草发生的基本规律 :若管理使用措施不当 ,人工草地在 3～ 4年后即会向天然植被逆向演替 ,且随着草地年龄的增大 ,退化演替趋势加快 ,杂草的群落结构越渐复杂。据此 ,开展了几种防除技术措施试验 ,结果表明 :4种除杂技术的防除效果均达 6 5 %以上 ,其中尤以轮换刈割草地和全日制小区轮牧除杂最佳 ,达 90 %以上 ,又最为经济适用 ,且有利于优质牧草的再生产 ,组分提高 2 0 %。
By investigating the occurrence of major weeds in Longtianshan Mountain, Qujing City, Yunnan Province, in recent years, we found out the basic law of weeds occurrence. If the management and use measures are not appropriate, the artificial grassland will be in 3 to 4 years It will reverse succession to natural vegetation. With the increase of grassland age, the trend of degenerative succession will be accelerated and the community structure of weeds will become more complicated. According to the results, several tests of control measures were carried out. The results showed that the control efficiencies of the four kinds of impurity removal technologies reached more than 65%. Especially, rotation and mowing of the mowing grassland and full-time plot were the best, Above, but also the most economical, and is conducive to the reproduction of high-quality forage grass, components increased 20%.