| 宁夏盐池荒漠草原植被的数量分类和排序 |
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| 引用本文： | 方楷,宋乃平,安慧,魏乐.宁夏盐池荒漠草原植被的数量分类和排序[J].生态学杂志,2011,30(12). |
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| 作者姓名： | 方楷 宋乃平 安慧 魏乐 |
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| 作者单位： | 1. 宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,银川,750021
2. 宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,银川750021;宁夏大学学术期刊中心,银川750021 |
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| 基金项目： | 国家自然科学基金项目(30960075)资助 |
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| 摘 要： | 为检验荒漠草原封育恢复的效果,对宁夏盐池围封9年的退化草场进行了植被调查,共记录34个物种,分属于12个科、27个属,其中豆科(9种)、禾本科(7种)、菊科(6种)所含物种数较多.与封育前相比,物种组成基本相同,常见种和建群种发生了明显变化.采用PCA排序和分层聚类将80个样方分为长芒草、白草、赖草3个群系,依据建群种或优势种的生物学特性将其生境划分为旱生生境、中生生境和轻度盐渍化生境.3个群系的演替速率不同,其中长芒草群系演替进入反应阶段,赖草群系的演替等级相对较高.群系间存在激烈的资源竞争关系,风蚀能够促进赖草群系的进一步扩大.建议通过划区轮牧的方式合理调控长芒草群系和赖草群系的放牧时期,以提高草场的放牧利用价值,降低赖草群系的扩张危险.
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| 关 键 词： | 荒漠草原 分层聚类 PCA排序 群落格局 |
Quantitative classification and ordination of plant communities in a desert steppe in Yanchi County of Ningxia,Northwest China |
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| FANG Kai
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SONG Nai-ping
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AN Hui
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WEI Le.Quantitative classification and ordination of plant communities in a desert steppe in Yanchi County of Ningxia,Northwest China[J].Chinese Journal of Ecology,2011,30(12). |
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| Authors: | FANG Kai SONG Nai-ping AN Hui WEI Le |
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| Institution: | FANG Kai1,SONG Nai-ping1,AN Hui1,WEI Le1,2(1Breeding Base of State Key Laboratory for Preventing Land Degradation and Ecological Restoration,Ningxia University,Yinchuan 750021,China,2Academic Journal Center,China) |
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| Abstract: | In order to examine the restoration effect of exclosure on desert steppe,an investigation was carried out on the plant communities in a degraded grassland after 9-year exclosure in Yanchi County of Ningxia.A total of 34 plant species were recorded,including 12 families and 27 genera.As compared with those before exclosure,the plant species composition after exclosure had less change,but the common species and constructive species changed remarkably.By using PCA ordination and hierarchical clustering methods... |
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| Keywords: | desert steppe hierarchical clustering PCA ordination community pattern |
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