雅鲁藏布江中部流域沙生植物资源调查  

Survey of Psammophyte Resources in Middle Basin of Yarlung Zangbo River

作　　者：宋国英 边巴卓玛 刘国一 SONG Guoying;BIANBA Zhuoma;LIU Guoyi(The Research Institute of Agricultural Resources and Environment,Tibet Academy of Agricultural and Animal Husbandry Sciences,Lhasa 850032;Barley Improvement and Yak Breeding Key Laboratory of Tibet Autonomous Region,Lhasa 850032)

机构地区：[1]西藏自治区农牧科学院农业资源与环境研究所,拉萨850032 [2]省部共建青稞与牦牛种质资源与遗传改良国家重点实验室,拉萨850032

出　　处：《中国农学通报》2024年第35期56-63,共8页Chinese Agricultural Science Bulletin

基　　金：西藏自治区重大科技专项——西藏生态保护-修复关键技术与生态文明高地建设示范(XZ202201ZD0005G03)。

摘　　要：为保护与开发利用青藏高原植物资源,改善生态环境。通过对雅鲁藏布江中部流域44个样地的沙生植物进行实地调研。共发现沙生植物167种43科121属;除仅有1种真菌、2种裸子植物和4种蕨类植物外,被子植物是主要构成部分,而双子叶植物是构成被子植物的主要类群;草本植物138种,以多年生草本植物为主要生活型。以拉萨市曲水县为沙生植物物种主要分布区;各分布区物种相似性较低,两县(区)相似系数在0.4以上的物种仅占7.69%。在垂直分布上呈“中间膨胀型”海拔分布趋势,大多数物种主要分布在海拔3501~4100 m之间;分布于2个及以上海拔段的物种仅占总种数的28.74%。该区域沙生植物种类相对丰富,在不同县(区)或海拔尺度上分布差异较大。该项研究可为利用乡土植物繁育、培育优良固沙植物进行青藏高原沙化地植被恢复提供科学基础。In order to protect,develop and utilize plant resources on the Qinghai-Tibet Plateau and improve the ecological environment,167 species,43 families and 121 genera of psammophytes were found through the field investigation of psammophytes in 44 sample plots in the middle basin of Yarlung Zangbo River.Except for 1 species of Fungus,2 species of Gymnosperms and 4 species of Ferns,Angiosperms are the main components,and dicotyledonous plants are the main groups of Angiosperms.There are 138 species of herbaceous plants,with perennial herbaceous plants as the main life type.Qushui County of Lhasa City is the main distribution area of psammophytes.The species similarity in each distribution area was low,and only 7.69%of the species with the similarity coefficient above 0.4 were found in the two districts.The vertical distribution showed an"intermediate expansion"altitude distribution trend,and most species were mainly distributed between 3501-4100 m;only 28.74%of the species distributed in two or more elevations.Psammophyte species in this area are relatively abundant,and their distribution varies greatly in different counties(districts)or altitude scales.This study can provide a scientific basis for the use of native plants to breed and cultivate excellent sand-fixing plants for the restoration of vegetation in the desertification land of Qinghai-Tibet Plateau.

关 键 词：雅鲁藏布江中部流域 沙生植物 多样性 相似性 青藏高原 生态恢复 植被分布 

分 类 号：S715.3[农业科学—林学]