祁连山区建植二年不同人工草地杂草群落特性的研究

Characteristics of Weed Community of secondary established artificial grassland of Perennial Grass in Qiian Mountain

对祁连山区人工多年生不同禾草草地建植第二年杂草群落特性进行的研究结果表明,该区禾草人工草地杂草种类组成较为复杂(26种均为阔叶杂草),但危害不大,只是其中细叶亚菊生长旺盛,与禾草共生,同期生长,频度较高,密度、盖度较小。通过计算SDR4值知该草地杂草入侵不严重。

Studies of the characteristics of weed community on the secondary established artificial grassland of perennial grass were carried out in Qiian Mountain. The results showed that the serious damage can not be occurred to the target artificial grassland although the composition of weed community is complex. Ajania tenuifolia is major species, which grow thriftily, posses high density, frequency and low coverage and have long co - existing period with target ~rass. The community can be found weed invasion is not seriou~ hv ealaulafin~ it~ .~,DRA