毛乌素沙地的生态背景及其草地建设的原则与优化模式

PRINCIPLES AND OPTIMAL MODELS FOR DEVELOPMENT OF MAOWUSU SANDY GRASSLAND

本文全面分析了毛乌素沙地生态过渡带的自然环境、植被的现状和历史变迁过程，以定性和定量相结合的方法阐述了环境和植被之间的动态关系，在此基础上提出了该地区草地建设的原则及优化生态模式，其中包括：水分平衡原则，半固定沙丘持续发展原则，网带状种植原则，滩地草、农、林复古系统模式、软梁半人工草地复合系统模式和硬梁天然草地放牧系统模式。

Athorough discussion and analysis on the history as well as the currentstates of the environment and vegetation in Maowusu Sandy grassland is pre- sented. Using a combination of both qualitative and quantitative methods, theauthor proposed the general principles and models for the grassland develop-ment there based on the ecological background information。 Particularly thisincludes:the water balance principle, sustained development principle forselni-fixed sand dunes,net-belt planting principle; grass and agroforestrymodel for low land,semi-artificial cultural model for soft hills and naturalgrazing model for hard hills.