半干旱黄土丘陵区不同整地方式下退化草地植物群落恢复特征

发布时间：2018-01-14 04:18

本文关键词：半干旱黄土丘陵区不同整地方式下退化草地植物群落恢复特征　出处：《水土保持通报》2016年05期 　论文类型：期刊论文

【摘要】：[目的]对比分析2种造林整地措施处理后的草地植物群落特征,为宁南半干旱黄土丘陵区植被恢复和建设提供理论依据。[方法]以固定样地与群落样方调查数据为基础,对比了"88542"水平沟、鱼鳞坑2种不同整地方式下群落动态特征。[结果](1)在一定的时间尺度上,生境的异质性对鱼鳞坑整地植物群落的结构影响较大,整地方式对植物群落结构特征的影响不明显。(2)生境条件的不同影响了群落的多样性。鱼鳞坑整地的植物群落由于生境的异质性较大,促成了较高的多样性。植物群落物种多样性由高到低的顺序为:鱼鳞坑整地"88542"水平沟整地天然封育草地。(3)植物群落多样性总体表现出随着年限的延伸,整个示范区的植物群落物种的多样性开始下降。[结论]不同人为干扰方式和不同生境对植物群落多样性有明显影响。
[Abstract]:[Objective] to provide theoretical basis for vegetation restoration and construction in semiarid loess hilly region of southern Ningxia by comparing and analyzing the characteristics of grassland plant communities treated by two afforestation and land preparation measures. [Methods based on the investigation data of fixed plot and community sample, the community dynamic characteristics of "88542" horizontal ditch and fish-scale pit were compared. [Results (1) on a certain time scale, the heterogeneity of habitat had a great influence on the structure of the plant community in the fish-scale pit. The difference of habitat conditions affected the diversity of plant community, and the plant community prepared in fish-scale pit was more heterogeneity because of the heterogeneity of habitat. The order of plant community species diversity from high to low is: fish scale pit land preparation "88542" horizontal ditch land preparation natural fencing grassland. The diversity of plant communities showed the extension of the years. The species diversity of plant communities in the entire demonstration area began to decline. [Conclusion: the diversity of plant communities is affected by different anthropogenic disturbance patterns and different habitats.
【作者单位】：宁夏农林科学院荒漠化治理研究所;宁夏农业综合开发办公室;
【基金】：国家科技支撑计划课题“宁南山区脆弱生态系统恢复及可持续经营技术集成与示范”(2015BAC01B01) 宁夏“十三五”重大攻关项目“宁夏多功能林业分区域研究与示范” 宁夏区自然资助项目(NZ14194) 宁夏农林科学院科技创新先导资金项目(NKYJ-14-23) 宁夏农林科学院自主研发项目(NKYJ-15-19)
【分类号】：S812
【正文快照】： 生物多样性的研究是全球关注的重点之一,它与全球变化、可持续发展并成为世界各国所面临的主要问题。生物多样性是所有生命系统的固有特征,是人类赖以生存的基础。但是随着人类活动范围的扩大,资源利用强度的加深,全球各类生态系统受到各种干扰破坏,发生了不同程度的受损和退

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