垂直切根可以改善松嫩草地羊草生长

Root cutting can improve the growth of Leymus chinensis in Songnen Plain

为了改善松嫩平原羊草(Leymus chinensis)草地日益退化及生产力急速降低的问题,本研究依据羊草克隆生长能力强的特点,在羊草草地分别设计了刀片间距为20与30cm,深度为5、10、15cm共6种组合的切根处理,并在羊草的生长周期内对其高度、密度以及生物多样性等特征进行分析。结果表明,不同的切根处理均对羊草的生长状况产生了一定影响,切根深度为5和10cm时均能显著提高羊草的高度和密度,显著降低了群落多样性指数(P<0.05),其中以5cm切根深度对羊草的生长最有利。因此得出结论:适宜的切根处理能够改善羊草的生长状况,对羊草草地的管理具有一定价值。

To address Leymus chinensis grassland degradation and dramatic productivity decline in Songnen Plain, we designed experiments with 20 and 30 cm spacing with 5, 10, and 15 cm deep root cuttings based con the L. chinensis clone growth ability characteristics. We analysed the height, density, biological diversity, quantity, and quality characteristics of L. chinensis community. The result showed that all root cutting treat- ments had different influences on the growth of L. chinensis. The root cutting depths of 5 and 10 cm signifi- cantly improved the height and density of L. chinensis and reduced the community diversity index （P〈0.05） ; the 5 cm deep root cutting also showed the best growth improvement of L. chinensis. From these results, we concluded that suitable root cutting treatments can improve the growth of L. chinensis and add value to the management of L. chinensis grassland.