| 退化羊草草原在浅耕翻处理后植物群落演替动态研究 |
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| 引用本文： | 宝音陶格涛,刘美玲,李晓兰. 退化羊草草原在浅耕翻处理后植物群落演替动态研究[J]. 植物生态学报, 2003, 27(2): 270-277. DOI: 10.17521/cjpe.2003.0041 |
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| 作者姓名： | 宝音陶格涛 刘美玲 李晓兰 |
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| 作者单位： | 1. 中国科学院植物研究所植被数量生态学重点实验室,北京,100093;内蒙古大学生态与环境科学系,呼和浩特,010021
2. 内蒙古大学生态与环境科学系,呼和浩特,010021 |
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| 基金项目： | 中国科学院知识创新重大项目 (KSCX1_0 8)，国家重点基础研究发展规划项目 (G2 0 0 0 0 186 0 4 ) |
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| 摘 要： | 在中国科学院生态中心草原站利用统计方法研究了退化羊草（Leymus chinensis）草原浅耕翻后群落演替规律。通过对18年数据的分析，结果表明：由于过度放牧而退化的羊草草原在浅耕翻处理后群落密度恢复较快，尤其是羊草与处理前相比已有很大变化，从而使群落得到了恢复。群落植物种的多样性、均匀性指数在这18年中均呈抛物线状分布。羊草、冰草（Agropyron michnoi）、变蒿（Artemisia commutata）、黄蒿（A．scoparia）、星毛委陵菜（Ｐotentilla acaulia）的生物量与多样性指数和均匀性指数有显著的相关性。羊草的相对密度在第五年达到最高水平，然后逐渐下降，自第十五年后羊草的相对密度基本趋于平衡，其重要值呈单峰型曲线。退化羊草草原18年恢复过程可划分为4个阶段：第一阶段（1～3年）为根茎禾草+一、二年生杂类草群落，第二阶段（4～9年）为纯羊草群落 ，第三阶段（10～13年）为羊草+冰草+多年生杂类草过度型群落，第四阶段（14～18年）为羊草+冰草+丛生禾草、多年生杂类草群落。经过处理后18年的恢复演替，退化群落仍未恢复到原生群落，演替将继续进行。
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| 关 键 词： | 退化羊草草原 浅耕翻 植物群落 演替动态 |
| 修稿时间： | 2002-02-04 |
THE STUDY ON DYNAMICS SUCCESSION OF COMMUNITY IN DEGENERATED STEPPE OF LEYMUS CHINENSIS AFTER SHALLOW PLOUGHING |
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| BAOYIN Taogetao , LIU Mei_Ling and LI Xiao_Lan. THE STUDY ON DYNAMICS SUCCESSION OF COMMUNITY IN DEGENERATED STEPPE OF LEYMUS CHINENSIS AFTER SHALLOW PLOUGHING[J]. Acta Phytoecologica Sinica, 2003, 27(2): 270-277. DOI: 10.17521/cjpe.2003.0041 |
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| Authors: | BAOYIN Taogetao LIU Mei_Ling LI Xiao_Lan |
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| Affiliation: | BAOYIN Taogetao 1,2 LIU Mei_Ling 2 and LI Xiao_Lan 2 |
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| Abstract: | The study was conducted at Inner Mongolia Grassland Ecosystem Research Station of the Chinese Academy of Sciences in Xilingol Region, 43°20′-44°00′N，116°06′ -117°05′E. The goal of the study was to provide some scientificbasis for the restoration of degenerated grassland. Many statistical methods were used to study the succession laws of degenerated steppe of Leymus chinensis after shallow ploughing. After the data over a period of 18 years were analyzed, the results showed that the method of shallow ploughing could improve community density in degenerated steppe of L. chinensis due to overgrazing. The index of diversity and homogeneity of plant species resulted in a open-up parabola for 18 years. The relative density reached maximum at the fifth year, then gradually decreased. It tended to horizon since the fifteenth year. The important value of L. chinensis appeared open-down parabola. The process of community succession can be divided into four stages. The first stage was a community of L. chinensis+annual and biennial synusia (1-3 years after shallow ploughing). The constructive synusia was rhizome grass. Dominant synusia were annual and biennial synusia. The second stage was a community of L. chinensis(4-9 years after shallow ploughing). The constructive synusia was rhizome grass. Dominant synusia were thick grass and rhizome Carex. The third stage was a transition community of L. chinensis+Agropyron michnoi+rosette grasses(10-13 years after shallow ploughing). The constructive synusia was rhizome grass. Dominant synusia were short thick grass and rosette grass. The fourth stage was a community of L. chinensis+A. michnoi, thick grasses, rosette grasses (14-18 years after shallow ploughing). The constructive synusia was rhizome grass. Dominant synusia were thick grass and rosette grass. Through 18 years of restoration, the degenerated steppe was different from the primary communities of L. chinensis. Therefore, it is predicted that succession will continue until a stable community establishes. |
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| Keywords: | Degenerated steppe L. chinensis Shallow ploughing Succession dynamics |
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