阿拉善飞播区沙拐枣利用率的研究  

A study on the utilization of Calligonum alaschanicum in Alaxan desert

作　　者：周志宇[1] 吴彩霞[1] 李雪瑞[1] 王斌[1] 张冈[1] 

机构地区：[1]兰州大学草地农业科技学院,甘肃兰州730020

出　　处：《草业科学》2006年第9期88-91,共4页Pratacultural Science

基　　金：国家自然科学基金西部环境研究资助项目计划(90102011);甘肃省科技攻关项目(2QS041-C31-20)

摘　　要：用定量的方法研究阿拉善沙地植物群落数量特征及耗水规律，结果表明，阿拉善沙拐枣Calligonum mongolicum是植物群落中的优势种。该植物群落的耗水量则取决于大气降水，降水丰富月份，植物的耗水量大，生长量相应增多；在月降水4mm的条件下，植物只能维持或过量消耗土壤水用于生长，其生长量下降；降水正常年份中，该群落生产1g干物质消耗土壤水603～648g，土壤水的利用效率是0．15％～0．16％。用模拟的方法研究沙拐枣的利用率，结果利用30％～50％为最佳。The characteristics and water depletion of plant community dominated by Calligonurn alaschanicurn in Alaxan desert were researched in this paper. The results showed that depleted water by C. alaschanicurn community depended on the precipitation. Biomass of C. alaschanicurn community in creased with the increase of precipitation. Utilization rate of water was from 0. 15% to 0.15%, while soil water was depleted from 630 to 648 gram as per gram dry matter being produced. The optimum utilization rate of C. alaschanicurn was from 30 %- 50 %.

关 键 词：阿拉善沙拐枣 优势种 耗水量 利用率 

分 类 号：S793.1[农业科学—林木遗传育种]