| 盐碱化湿地芦苇群落围封和过牧条件下土壤和植被变化 |
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| 引用本文： | 关法春,闫超,梁正伟.盐碱化湿地芦苇群落围封和过牧条件下土壤和植被变化[J].湿地科学,2009,7(1). |
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| 作者姓名： | 关法春 闫超 梁正伟 |
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| 作者单位： | 1. 中国科学院东北地理与农业生态所,吉林,长春,130012;中国科学院研究生院,北京,100049
2. 中国科学院东北地理与农业生态所,吉林,长春,130012;中国大安碱地生态试验站,吉林,大安,131317 |
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| 基金项目： | 中国科学院东北地理与农业生态研究所知识创新工程前沿领域项目，国家重点基础研究发展规划(973计划)，国家科技支撑重大项目 |
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| 摘 要： | 为了完善松嫩平原西部盐碱化湿地植被对围栏封育和过牧适应的策略,对比研究了围栏与过牧条件下盐碱化湿地芦苇(Phragmites australis)群落植株表型特征和土壤基本理化特性的差异.结果表明,与围栏封育措施相比,过牧条件下的芦苇植株株高、叶长和节间距等极显著减小(n=20,p<0.01),根冠比极显著提高(n=3,p<0.01),植株发生小型化.过牧条件下的植被生物量明显下降,植被覆盖度减小,导致土壤水分过度蒸发散失,土壤盐碱成分向土壤表层积聚,导致芦苇群落在退化过程中出现大量的斑块化裸地,而围栏封育下芦苇群落的生长状况则接近自然状态.
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| 关 键 词： | 芦苇 退化机理 植株个体小型化 土壤盐碱化 |
Differences of the Soil and Vegetation in Phragamites australis Community Between Enclosed and Grazed Alkali-salinity Wetlands |
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| GUAN Fa-Chun,YAN Chao,LIANG Zheng-Wei.Differences of the Soil and Vegetation in Phragamites australis Community Between Enclosed and Grazed Alkali-salinity Wetlands[J].Wetland Science,2009,7(1). |
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| Authors: | GUAN Fa-Chun YAN Chao LIANG Zheng-Wei |
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| Institution: | 1.Northeast Institute of Geography and Agroecology;Chinese Academy of Sciences;Changchun 130012;Jilin;P.R.China;2.Graduate University of Chinese Academy of Sciences;Beijing 100049;3.Da'an Sodic Land Experiment Station of China;Da'an 131317;P.R.China |
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| Abstract: | In order to offer a theoretical and practical reference and comparison of the phenotypic characteristics of Phragmites communis,a basic study of soil and vegetation characteristics was conducted,and two environments,enclosed wetlands and the open,over-grazed wetlands,west of the Songnen Plain were focused on.The study results showed that in the open,grazed wetlands the typical plant height,leaf length,1st internodal length,2st internodal length and leaf blade width were significantly reduced(n=20,p<0.01) co... |
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| Keywords: | Phragamites australis degrading mechanism individual plant miniaturization soil alkali-salinity |
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