当前位置: 首页 > 文章 > 短命植物分布与沙垄表层土壤水分的关系——以古尔班通古特沙漠为例 应用生态学报 2004,15 (4) 556-560
Position: Home > Articles > Relationship between ephemeral plants distribution and soil moisture on longitudinal dune surface in Gurbantonggut desert. Chinese Journal of Applied Ecology 2004,15 (4) 556-560

短命植物分布与沙垄表层土壤水分的关系——以古尔班通古特沙漠为例

作  者:
王雪芹;蒋进;雷加强;赵从举
单  位:
中国科学院新疆生态与地理研究所
关键词:
短命植物;分布;土壤水分;古尔班通古特沙
摘  要:
于 2 0 0 2年 3月至 2 0 0 2年 8月 ,对古尔班通古特沙漠南部短命植物分布和沙垄表层 30cm厚土壤水分间的关系进行了系统监测和研究 .结果表明 ,早春表层土壤水分在个体沙丘表面的分异直接影响到短命植物的分布 .4月下旬 ,垄间、两坡和垄顶土壤含水率依次为 4 6 2 %、3 98%和 2 0 1% ,相应的短命植物平均盖度于 5月中上旬依次为 5 1 8%、38 2 %和 4 4 % .5月中旬后 ,短命植物的分布又改变了表层土壤水分分布 ,上述各地貌部位的土壤含水率依次为 1 0 0 %、1 90 %和 2 4 5 % ,形成垄顶最高、两坡次之、垄间最差的新的空间分布格局 .
译  名:
Relationship between ephemeral plants distribution and soil moisture on longitudinal dune surface in Gurbantonggut desert.
作  者:
WANG Xueqin 1,2,JIANG Jin 1,LEI Jiaqiang 1,ZHAO Congju 1 ( 1Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China; 2Cold & Arid Regions Environment and Engineering Institute,Chinese Academy of Sciences,Lanzhou 730000,China).
关键词:
Ephemeral plants, Distribution, Soil moisture, Gurbantonggut desert.
摘  要:
Ephemeral plant is a particular group of desert flora only distributed in northern Xinjiang,China.In this study,field surveys of vegetation and soil moisture were conducted in the southern area of the Gurbantonggut desert from March to August 2002. The species number,coverage and growth of ephemerals and soil moisture were measured in 7 quadrats at different geomorphic positions on the longitudinal dune surface.The results showed that soil moisture in a depth of 0~30 cm affected ephemeral plants distribution significantly.In early spring,the soil moisture was 4.62% on the intredune,3.98% on the plinth,and 2.01% on the crest.Consequently,the average coverage of ephemeral plants reached 51.8%,38.2% and 4.4%,respectively.The existence of ephemeral plants distribution influenced soil moisture as well.In later May,there was an increase of surface soil moisture from the interdune to the crest.The soil moisture was 1.00% on the intredune,1.90% on the plinth,and 2.45% on the crest.

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