VOR and CVOR Index for Health Evaluation of Typical Steppe in Inner Mongolia

doi:10.11733/j.issn.1007-0435.2012.03.003

Acta Agrestia Sinica ›› 2012, Vol. 20 ›› Issue (3): 401-406.DOI: 10.11733/j.issn.1007-0435.2012.03.003

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VOR and CVOR Index for Health Evaluation of Typical Steppe in Inner Mongolia

SHAN Gui-Lian¹, CHEN Gong¹, LIU Zhong-lin², YAN Zhi-Jiang³, CHU Xiao-Hui¹

1. Pasture Science Department, Yunnan Agricultural University, Kunming, Yunan Province 650201, China;
2. College of Life Sciences, Inner Mongolia University, Hohhot, Inner Mongolia 010021, China;
3. Grassland Research Institute of Chinese Academy of Agricultural Science, Hohhot, Inner Mongolia 010010, China

Received:2011-10-12 Revised:2012-01-16 Online:2012-06-15 Published:2012-07-05

典型草原健康评价的VOR和CVOR指数

单贵莲¹, 陈功¹, 刘钟龄², 闫志坚³, 初晓辉¹

1. 云南农业大学草业科学系, 云南昆明 650201;
2. 内蒙古大学生命科学学院, 内蒙古呼和浩特 010021;
3. 中国农业科学院草原研究所, 内蒙古呼和浩特 010010

通讯作者: 初晓辉,E-mail:chuxiaohui@ynau.edu.cn
作者简介:单贵莲(1982- ),女,云南沾益人,博士,讲师,研究方向为草地生态,E-mail:shanguilian8203@yahoo.com.cn
基金资助:
国家重点基础研究"973"项目(2007CB106800)资助

Abstract

Abstract: Effects of fencing on the health of grassland ecosystem in open- grazing land and fenced- land with the same vegetation composition (Leymus chinensis and Stipa krylovii are main species) and soil type are reported. Calculation models for VOR and CVOR index were created and their indices used to evaluate the health of typical steppes fenced in different years. Results showed that VOR and CVOR indices could accurately evaluate the health of typical steppe ecosystems fenced in different years. The evaluation results of both indices were quite consistent. The condition (C), vigor (V), organization (O) and resilience (R) of typical steppe in the restoration succession had different change patterns, whereas VOR and CVOR indices showed the same change tendency to increase gradually with prolonged fencing. The health condition of typical steppe was increased from "threshold" level to "health" level after fenced 13 years showing that the implement of fencing was beneficial to the health recovery of degraded grassland ecosystem.

Key words: Typical steppe, Health evaluation, Grazing, Fencing, VOR index, CVOR index

摘要： 为准确定量评价围封禁牧对草原生态系统健康的影响,以内蒙古太仆寺旗境内植被组成一致(以羊草(Leymus chinensis)+克氏针茅(Stipa krylovii)草原为主)、土壤类型相同的自由放牧样地和围封样地为研究对象,开展自由放牧和围封禁牧对典型草原健康影响的VOR和CVOR指数评价,建立典型草原健康评价的VOR和CVOR综合指数的计算模型,并用于不同围封年限典型草原的健康评价。结果表明:VOR和CVOR综合指数均可准确评价不同围封禁牧年限典型草原的健康状况,两者具有基本一致的评价结果。典型草原在围封恢复演替过程中,尽管草地基况(C)、活力(V)、组织力(O)和恢复力(R)变化各异,但围封禁牧后草地的VOR和CVOR综合指数均随围封禁牧年限的延长呈逐渐增加的变化趋势,草地的健康等级由未围封和围封前期的"警戒"等级逐步恢复演替至 "健康"(围封13~20年)等级,表明围封有利于退化草地生态系统的健康恢复。

关键词: 典型草原, 放牧, 围封, 健康评价, VOR指数, CVOR指数

CLC Number:

S812

SHAN Gui-Lian, CHEN Gong, LIU Zhong-lin, YAN Zhi-Jiang, CHU Xiao-Hui. VOR and CVOR Index for Health Evaluation of Typical Steppe in Inner Mongolia[J]. Acta Agrestia Sinica, 2012, 20(3): 401-406.

单贵莲, 陈功, 刘钟龄, 闫志坚, 初晓辉. 典型草原健康评价的VOR和CVOR指数[J]. 草地学报, 2012, 20(3): 401-406.

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VOR and CVOR Index for Health Evaluation of Typical Steppe in Inner Mongolia

典型草原健康评价的VOR和CVOR指数

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