| 生物与生态 |
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| Effects of Biological Soil Crusts on Seed Bank |
| SU Yan-gui, LI Xin-rong, ZHANG Jing-guang, YANG Li-wen |
| Shapotou Desert Experimental Research Station, Cold and Arid Regions Environmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract Experiments on sorts and densities of seeds in different biological soil crusts were conducted in natural illumination. The experiment was arranged in four treatments: moss crust in dry and moist condition, algae crust in dry and moist condition. The result indicates that: (1)there are nine kinds of seeds germinated in the two sorts of crusts, they are Artemisia ordosica Krasch Chenopodium glaucum L, Allium polyirhizum Turcz.ex Rgl., Rragrostis poaeoides Beauv, Amaranthus.retroflexus L., Potulaca oleracea L, Setaria viridis (L.), Bassia dasyphylla （Fisch.et Mey）respectively, among them, seven kind of plants are the annual; (2) the differences of seeds number in different crusts are significant: in moist crusts, there is an extremely significant difference(P<0.001), in dry crust, there is a significant difference(P<0.05); (3)from the different water content in crusts, and the difference of germinated seeds(P<0.001), we can conclude that water content in crusts is the main restriction to numbers of germinated seeds.
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Received: 08 May 2005
Published: 20 December 2006
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[1]Harper J L. Population Biology of Plants [M].London: Academic Press, 1977.289.
[2]赵丽娅,赵哈林.我国沙漠化过程中的植被演替研究概述[J].中国沙漠,2002,20(增刊):7-14.
[3]Syed Shahid Shaukat, Imran Ali Siddiqui. Spatial pattern analysis of seeds of an arable soil seed bank and its relationship with above-ground vegetation in an arid region[J].Journal of Arid Environments,2004,57:311-327.
[4]Syed Shahid Shaukat, Imran Ali Siddiqui. Spatial pattern analysis of seeds of an arable soil seed bank and its relationship with above-ground vegetation in an arid region[J].Journal of Arid Environments,2004,57:311-327
[5]Town Shend J R G, Justice C O. Analysis of dynamics of African vegetation using the normalized difference vegetation index[J]. Int. J. of Remote Sensing,1986,12:1224-1242.
[6]Belnap J, Harper K T, Warren S D. Surface disturbance of cryptobiotic soil crusts:Nitrogenase activity, chlorophyll content, and chlorophyll degradation[J]. Arid Soil Research and Rehabilitation,1994,8:1-8.
[7]李新荣,贾玉奎,龙利群,等.干旱半干旱地区土壤微生物结皮的生态学意义及若干研究进展[J].中国沙漠,2001,21(1):4-11.
[8]任珺,陶玲,刘新民.水分供应对沙漠植被土壤种子库中种子萌发的影响[J].植物学报,2002,44（1）:124-126.
[9]樊恒文,肖洪浪,段争虎,等.中国沙漠地区降尘特征与影响因素分析[J].中国沙漠,2002,22（6）:559-565.
[10]周海燕,张景光,龙利群,等.脆弱生态典型区域几种锦鸡儿属灌木的光合特征[J].中国沙漠,2001,21（3）:227-231.
[11]胡春香,刘永定,宋立荣,等.半荒漠藻结皮中藻类的种类组成和分布[J].应用生态学报,2000,11（1）:61-65.
[12]王世冬,白学良,雍世鹏. 沙坡头地区苔藓植物区系初步研究[J].中国沙漠,2001,21（3）:244-249.
[13]李守中,肖洪浪,宋耀选,等.腾格里沙漠人工固沙植被区生物土壤结皮对降水的拦截作用[J].中国沙漠,2002,22（6）:612-616.
[14]龙利群,李新荣.土壤微生物结皮对两种一年生植物幼苗存活和生长的影响[J].中国沙漠,2003,23（6）:656-660.
[15]李新荣,张景光,刘立超,等.我国干旱沙漠地区人工植被与环境演变过程中植物多样性的研究[J].植物生态学报,2000,24（3）:257-261.
[16]王刚,梁学功.沙坡头人工固沙区的种子库动态[Ｊ].植物学报,1995,37（3）:231-237.
[17]梁学功,王刚.沙坡头人工固沙区种子库动态及对植被演替方向的预测[Ａ].中国科学院沙坡头沙漠试验研究站年报[Ｃ]. 兰州:甘肃科学技术出版社,1993.108-119.
[18]龙利群,李新荣.微生物结皮对两种一年生植物种子萌发和出苗的影响[J].中国沙漠,2002,22（6）:581-585. |
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2006, Vol. 26 
