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当前位置: 首页 > 文章 > 河西中麻黄地理分布与环境因子的关系 甘肃林业科技 2008,33 (4) 9-14+69
Position: Home > Articles > The Geographic Distribution of Ephedra intermedia and Its Environmental Factors in Hexi Region Journal of Gansu Forestry Science and Technology 2008,33 (4) 9-14+69

河西中麻黄地理分布与环境因子的关系

作  者：
张国中;满多清;王继和;杨自辉
单  位：
甘肃省治沙研究所/甘肃省荒漠化防治重点实验室/甘肃民勤荒漠草地生态系统国家野外科学观测研究站
关键词：
河西地区;中麻黄;分布;生长;环境因子
摘  要：
调查分析表明:河西地区中麻黄主要分布于酒泉市以东,黄河以西的17个县(区)。走廊东段是其集中分布区和主要产区,土壤质地以沙壤土、轻壤土、壤土和风沙土为主,且土壤有机质含量在10 g/kg以上生长良好,5～10 g/Kg中等,低于5 g/kg%差;越往西去,随着生境恶化,中麻黄渐稀,生长发育渐弱。天然中麻黄种群大多数分布于含盐量低于10 g/kg的土壤上,并随着土壤含盐量上升,分布趋于减少;在以土壤全盐量、pH值及盐离子对中麻黄生物量影响程度的灰色关联分析中,土壤全盐量、pH值和SO42-是主导因子,Ca2+、K++Na+、Cl-、HCO3-、Mg2+关联度较小且相近,对生物量影响相似。中麻黄虽是强旱生植物,在降水量较大或地下水位高的地域内生长良好,处于生存竞争中的强者,但在极端干旱区只能生存于较低易积水的区域,且生长微弱,与膜果麻黄、红砂等超旱生植物群落形成明显对比,成为弱势种群。
译  名：
The Geographic Distribution of Ephedra intermedia and Its Environmental Factors in Hexi Region
作  者：
ZHANG Guo-zhong1,MAN Duo-qing1,2,WANG Ji-he1,YANG Zi-hui1(1.Gansu Desert Control Research Institute/Gansu Key Laboratory of Desertification Combating/ National Field Scientific Observation Research Station on Gansu Minqin Desert Rangeland Eco-system,Wuwei Gansu 733000,China;2.Key Laboratory of Desert and Desertification/Cold and Arid Regions Environmental and Engineering Re-search Institute,Chinese Academy of Sciences,Lanzhou Gansu 730000,China)
关键词：
Hexi region;Ephedra intermedia;distribution;growth;environmental factors
摘  要：
Ephedra intermedia in Hexi corridor is mainly distributed in the 17 counties which are located in the east of Jiuquan to the west of Huanghe River.The east part of Hexi corridor,with the dominated soil of sandy loam,light loam,loam and sandy soil,is the main area where natural E.intermedia is distributed and produced.The plants grow sparsely with weak growth in the west of Hexi corridor.Natural E.intermedia is normally grown in the soil with salt content less than 10 g/kg,when salt content in the soil becomes higher,the plant grows sparser and less.It can grow well in the soil organic matter more than 10 g/kg,fairly in the 5～10 g/kg,and weakly less than 5 g/kg.In gray corre-la-tion analy-sis,soil salt content,pH value and SO42-are the dominant factors,Ca2+,k++Na+,Cl-,HCO3-,Mg2+,which can also influence the biomass relatively.Although E.intermedia is strong in drought-resistance,it can grow well in the arid ar-eas with more rainfall or higher underground water table as a strong species in survival competition;however,it can only survive in the low land where water can be accumulated and also grow weakly in the extreme arid area.

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