关键词: 阿拉善荒漠, 一年生植物层片, 物种多样性, 分布

Abstract: Taking square shelternets as a studying object, sustainable management model of shelterbelts/windbreaks in the shelternets system was constructed to express the quantitative relationship between functional aim of shelternets system and elements of spatio-temporal structure state of shelternets, by analyzing elements of spatio-temporal structure state of shelternets such as management scale, regeneration ability, regeneration age of shelterbelt and regeneration pattern. In this paper, the model validity was tested to testify the practicability of the model firstly. Then, the model was applied in the poplar networks on the study site, Shaobing Village of Changtu County, Liaoning Province. The spatial position of regeneration belts and the dynamic process of the whole shelternets structure were calculated, as well as the age sturcture and transfering series of spatial distribution of age in shelternets at every management stage. The results showed that application of this model would improve the management of shelterbelts, which could form the sustainable state and conquer the disadvantage of instable protection effects in traditional management.

Key words: Alashan desert, Annual plant synusiae, Specific diversity, Distribution