黄土高原沟壑区人工刺槐林的建设、更新与演替

Building,Updating and Succession of Plantation in the Gully Area of Loess Plateau

通过对王东沟小流域人工刺槐林生产现状、更新和演替过程进行分析,提出黄土高原沟壑区林草植被建设中应把人工刺槐林的培育与更新结合起来,通过皆伐萌蘖、择优间伐等措施进行人工刺槐林的更新;应根据二代刺槐林的生长和对水分的利用情况,对刺槐林进行合理采伐利用,不宜培育第三代刺槐林;应尽量保留草本和灌木植物,使之先被天然草本群落代替,继续发挥植被防止土壤侵蚀的作用,改善生态环境。

Several suggestions are presented through the analysis of plantation production situation of artificial locust and its updating and succession processes in Wangdong watershed. The construction of locust forest should be combined with its updating during the forest-grass vegetation construction in the gully area of the loess plateau. The measures like clear cutting and root-sprout and preferred thinning-cutting should be taken to update it. Cutting and reasonable use of locust forest should be based on second-generation locust forest growth and water use situation. At present, it is not adequate to cultivate the third generation. It is better to preserve herb and shrub plants so that it is replaced by a natural herb community firstly. The roles of vegetation in preventing soil erosion should be played at the same time in order to improve the ecological environment.