| 拉萨半干旱河谷砂生槐灌丛群落退化程度评价 |
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| 引用本文： | 杨小林,宫照红,马和平.拉萨半干旱河谷砂生槐灌丛群落退化程度评价[J].西北林学院学报,2012,27(5):11-14. |
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| 作者姓名： | 杨小林 宫照红 马和平 |
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| 作者单位： | 西藏农牧学院,西藏林芝,860000 |
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| 基金项目： | “十一五”国家科技支撑计划项目(2007BAC06B02);西藏农牧学院创新团队项目 |
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| 摘 要： | 为探索拉萨半干旱河谷地带性植被—砂生槐灌丛的恢复重建和分类经营的方法和途径,采用Delphi(专家咨询法)和AHP(层次分析法)相结合的方法,在相关指标调查的基础上,选择8个指标因子,建立退化评价指标体系及相应的综合评定指数,评判拉萨半干旱河谷砂生槐群落灌丛退化程度。结果表明:1)砂生槐群落盖度<10%,退化指数为0.78,属于极度退化;群落盖度10%～30%,退化指数为0.61,属重度退化;群落盖度30%～60%,退化指数为0.49,属中度退化;盖度≥60%以上,指数为0.27,属轻度退化。2)在极度退化地段应采取植被重建,人工进行恢复;重度和中度退化的可采用人工促进和封育措施来控制干扰强度,改善干扰方式,促进自然恢复;对于轻度退化的可采用轮牧的方式进行适度的经营活动。
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| 关 键 词： | 砂生槐 退化指数 恢复 拉萨半干旱河谷 |
Evaluation on the Degradation of Shrub Community of Sophora moorcroftiana in Semi-Arid Valley of Lhasa |
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| YANG Xiao-lin
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GONG Zhao-hong
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MA He-ping.Evaluation on the Degradation of Shrub Community of Sophora moorcroftiana in Semi-Arid Valley of Lhasa[J].Journal of Northwest Forestry University,2012,27(5):11-14. |
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| Authors: | YANG Xiao-lin GONG Zhao-hong MA He-ping |
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| Institution: | (Tibet Agriculture and Animal Husbandry College,Nyingchi,Tibet 860000,China) |
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| Abstract: | Shrub community of Sophora moorcroftiana is a zonal vegetation type in semi-arid valley of Lhasa.In order to develop the method for its restoration and specific managements,based on the survey of relevant indicators,this paper established evaluation index system and corresponding indices by using Delphi and AHP methods.The results showed that the degradation of the community could be divided into 4 levels: extreme(with the coverage of less than 10%,and degradation index of 0.78),severe(with the coverage of less than 10% to 30%,and degradation index of 0.61),medium(with the coverage of 30% to 60%,and degradation index of 0.49),and minor degradation(with the coverage of equal or more than 60%,and degradation index of 0.27).In the region with extreme degradation,artificial restoration should be adopted;in the regions with severe and medium degradations,measures such as artificial promotion restoration and enclosure should be applied to control the intensity of disturbance,and to enhance natural restoration;in the minor degradation region,measures such as rotational grazing could be adopted to carry out moderate production activities. |
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| Keywords: | Sophora moorcroftiana degradation index restoration semi-arid valley of Lhasa |
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