单 位：
黄河水利委员会;中国水利水电科学研究院泥沙研究所
关键词：
地衣结皮;厚度;群落;分布特征;荒漠化地区
摘 要：
生物结皮是干旱、半干旱荒漠化地区生态环境变化的急先锋,能够很好地反映当地的生态环境改善情况。本研究于2010、2011年在宁夏盐池县沙泉湾国家生态定位站和内蒙古自治区巴彦淖尔市磴口县境内的中国林业科学研究院沙漠林业实验中心第一实验场设置试验地,通过野外调查,测量不同植被覆盖条件下的地衣结皮厚度分布特征,以期找出生物结皮厚度变化规律,为当地防护林建设提供数据支持。研究结果表明:在宁夏盐池县沙泉湾,不同植被覆盖下地衣结皮厚度大小表现为花棒>羊柴>油蒿,而在内蒙古磴口县,不同植被覆盖下地衣结皮厚度大小表现为柽柳>油蒿;比较两个地区油蒿覆盖下地衣结皮厚度大小表现为盐池沙泉湾>磴口沙林中心;以油蒿植被为例,离植株根部越近,地衣结皮厚度越大。
译 名：
Distribution Characteristics of Crust Thickness of Lichens in Desertification Area
作 者：
ZHENG Kexiang;LI Bai;HUI Bo;Shexian Water Conservancy Bureau;Sediment Research Institute,China Institute of Water Resources and Hydropower Research;Research Center on Soil and Water Conservation of the Ministry of Water Resources;Suide Soil and Water Conservation Scientific Experimental Station,Yellow River Conservancy Commission;
关键词：
crust of lichens;;thickness;;community;;distribution characteristics;;desertification area
摘 要：
Biological soil crusts serve as a vanguard for the changes of ecological environment in arid and semi-arid desertification areas and it can fairly reflect the improvement situation of ecological environment. The test sites were set up at Shaquanwan National Ecological Positioning Station in Yanchi County of Ningxia and the first testing ground of Desert Forestry Experimental Center of Chinese Academy of Forestry Sciences in Dengkou County of Bayannur City in Inner Mongolia in 2010 and 2011. Through field survey,it measured the thickness of biological soil crusts under the different conditions of vegetation coverage and studied the characteristics of distribution for finding out the variation law of the thickness of biological soil crusts and for providing data support for the local shelterbelt building. The outcomes show that a) in Shaquanwan in Yanchi County of Ningxia,the thickness of crust of lichens under the different conditions of vegetation coverage shows Hedysarum scoparium> Hedysarum mongolicum> Artemisia ordosica,while in Dongkou County of Inner Mongolia,the thickness of crust of lichens under the different conditions of vegetation coverage shows Tamarix chinensis > Artemisia ordosica; b) comparing the thickness of crust of lichens under the coverage of Artemisia ordosica of the two regions,it shows Shaquanwan of Yanchi County > Desert Forestry Experimental Center of Dongkou County and; c) taking Artemisia ordosica vegetation as an example,the closer to the roots of plants,the thicker of crust of lichens is.
