川西干旱河谷区植被恢复机理及模式分析

干旱河谷区与石漠化荒地、沙化区等同属困难立地区,其植被恢复已成为国土绿化和生态治理的重点和难点.川西干旱河谷区地形和气候环境复杂,植被恢复限制因子多,关键技术和理论的突破已是瓶颈问题,急需得到进一步解决.本文通过对川西干旱河谷区的形成过程、立地条件、植被演替趋势、存在的问题等进行系统分析,总结历史上该区域植被恢复成功和失败的经验,从恢复植被物种选择、灌溉方式、整地方法、栽植技术、管护等角度提出该区植被恢复适宜模式,为干旱河谷区植被恢复提供理论和实践依据.

Mechanism and model analysis with vegetation restoration in arid valley area of western Sichuan

Dry valleys, rocky desertification and desertification areas are all difficult for afforestation. Vegetation restoration in dry valleys has become the focus and difficulty of land greening and ecological management. The terrain and climate environment in the arid valley area of western Sichuan are complex, and this area are challenged by many limiting factors of vegetation restoration. The breakthrough of key technology and theory has been a bottleneck problem to be solved urgently. Based on the analysis of the formation process, site conditions, vegetation succession trend and existing problems in the arid valley area of western Sichuan, this paper summarizes the experience of success and failure of the vegetation restoration in the history of the region. From the restoration of vegetation species selection, irrigation, soil preparation, planting technology, protection of the vegetation restoration suitability model, theoretical and practical basis for the restoration of vegetation in the arid valley area is proposed.