| 宁夏中部干旱带草地20年生产力和承载力变化研究 |
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| 引用本文： | 兰剑,沈艳.宁夏中部干旱带草地20年生产力和承载力变化研究[J].安徽农业科学,2009,37(9). |
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| 作者姓名： | 兰剑 沈艳 |
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| 作者单位： | 宁夏大学草业科学研究所,宁夏银川,750021;宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏银川,750021 |
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| 基金项目： | 宁夏重点科技攻关项目 |
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| 摘 要： | 目的]探讨宁夏中部干旱带草地植被逆行演替规律。方法]以1982~2001年的调查资料为基础,对7个调查样点的草地型、植被特征、草地生产力及草地质量进行分析。结果]宁夏中部干旱带的草地型在近20年的时间里已经发生或正在发生变化,群落内优势种也正在被其他种所代替,植被覆盖度和群落内植物种数在持续下降,草地承载力平均下降了114%,草地质量严重下降。结论]该研究为典型草原可持续利用提供了基础数据。
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| 关 键 词： | 草地 退化 植被演替 生产力 承载力 |
Changes of Productivity and Grazing Capacity of Grassland in Middle Arid Zone of Ningxia during 20 Years |
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| LAN Jian et al.Changes of Productivity and Grazing Capacity of Grassland in Middle Arid Zone of Ningxia during 20 Years[J].Journal of Anhui Agricultural Sciences,2009,37(9). |
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| Authors: | LAN Jian |
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| Institution: | LAN Jian et al (Institute of Pratacultural Science,Ningxia University,Yinchuan,Ningxia 750021) |
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| Abstract: | Objective] The study aimed to explore the vegetation regressive succession law of the middle arid zone of Ningxia.Method] Based on the investigation data of seven plots in this region from 1982 to 2001,grassland type, vegetation characteristics,productivity and grassland quality were analyzed.Result] During nearly 20 years,the grassland type of Middle Arid Zone of Ningxia had been changing;the dominant species were being replaced by other species;the vegetation coverage and the number of species in commu... |
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| Keywords: | Grassland Degradation Vegetation succession Productivity Grazing capacity |
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