宁夏贺兰山国家级自然保护区荒漠草原植物多样性研究  

Research on the Speicies Diversity of Desert Steppe in National Level Nature Protection Area of Helan Mountain of Ningxia

作　　者：郑国琦[1] 杨涓[1] 张磊[1] 王强强[1] 胡天华 

机构地区：[1]宁夏大学生命科学学院,宁夏银川750021 [2]宁夏贺兰山国家级自然保护区,宁夏银川750021

出　　处：《北方园艺》2013年第10期87-91,共5页Northern Horticulture

基　　金：宁夏贺兰山国家级自然保护区委托课题资助项目;宁夏大学大学生创新资助项目(11SWL12)

摘　　要：采用样地调查法对宁夏贺兰山国家级自然保护区荒漠草原植物多样性进行了研究。结果表明:荒漠草原带物种丰富度指数以汝萁沟为界,在其南部由南向北物种丰富度指数呈现逐渐增加的趋势,其中插旗口最高;而在汝萁沟以北(包括汝萁沟),由南向北物种丰富度指数呈现逐渐下降的趋势。位于贺兰山南段的榆树沟和位于中段的拜寺口沟和插旗口沟的辛普森指数总体高于北段各沟,说明南段和中段各沟荒漠草原样地物种优势度小于北段各沟,但植被盖度却高于北段各沟,这可能与贺兰山不同沟道降雨量密切相关。The speicies diversity of the desert steppe and the grass savanna of the Helan Mountain which was one of the national level nature protection areas by surveying the sample plots were studied. The results showed that Ruqigou was the boundary of the species abundance index in the desert steppe, in the south, the species abundance index showed a gradual increase from south to north and reached the highest point in Chaqikou. While in the north,including Ruqigou,it showed a declining trend. The Simpson index of the Yushugou which was in the south of Helan Mountain as well as the Baisikougou and Chaqikougou which were in the middle of Helan Mountain was totally higher than it in the north part. It indicated that the species dominance in south and middle desert steppe was smaller than it in the north. That would had a close relatinship with the factor of the rainfall capacity in the different channel of Helan Mountains. ,

关 键 词：宁夏 贺兰山 国家级自然保护区 荒漠草原 植物多样性 

分 类 号：Q948[生物学—植物学]