干旱区研究2023，Vol.40Issue(12)：1949-1958,10.DOI:10.13866/j.azr.2023.12.08
民勤西沙窝沙区不同演替阶段植被变化特征研究
Vegetation change characteristic research of different evolution stages in Minqin Xishawo desert areas
摘要
Abstract
Through eco-measurement and research at the Xishawo desert pasture in Minqin for 60 a,it was found that desert vegetation flora has experienced four main stages with ground water-table decline,they were the degraded meadow steppe and Tamarix flora,Tamarix and Nitraria flora,Nitrariaand degraded Tamarix flora,and Nitraria flora,the plant diversity and coverage dcreased in the processing,eco-degradation and desertification developed remarkably;with rain-fed area enlargement,desert herbal plants grew when precipitation was higher in the year,the plant diversity and coverage increased,and vice versa;some desert shrubs were relatively stable,its population growth and development improved when precipitation was over 140 mm,100-140 mm for basic growth,and<100 mm degraded gradually;most plant species of windbreak and sand-fixation afforestation degraded under drought conditions,Haloxylon ammodendron had strong eco-adaptability as an introduced species,it has developed into the biggest man-made windbreak and sand-fixation forest in Minqin desert areas,its big density and drought land were the main reasons for degradation,and sustainability could be increased under low density afforestation according to local plant carry capacity.Recently,with the integrated program implementation in the Shiyang River watershed area,eco-water has been increased,groundwater table has increased in some surroundings,some micro-wetlands have formed,original desert meadow steppe has reoccured,and their ecosystems are developing positively;however,ground water table still reduces slowly in most desert areas,and desertification has developed.关键词
民勤/西沙窝沙区/植被/演替/变化特征Key words
Minqin/Xishawo desert area/vegetation/evolution/change characteristics引用本文复制引用
满多清,李得禄,刘明成,张德魁,唐进年,陈芳,付贵全,杨雪梅,丁峰..民勤西沙窝沙区不同演替阶段植被变化特征研究[J].干旱区研究,2023,40(12):1949-1958,10.基金项目
国家自然科学基金项目(32260426) （32260426）
国家重点研发项目(2020YFA0608401) （2020YFA0608401）
省级重点人才项目(甘组通字[2023]20号) （甘组通字[2023]20号）
