Effects of Reseeding on Plant Community Composition and Diversity of Moderately Degraded Alpine Grassland in Qinghai-Tibetan plateau

doi:10.11733/j.issn.1007-0435.2018.05.005

Acta Agrestia Sinica ›› 2018, Vol. 26 ›› Issue (5): 1071-1077.DOI: 10.11733/j.issn.1007-0435.2018.05.005

Effects of Reseeding on Plant Community Composition and Diversity of Moderately Degraded Alpine Grassland in Qinghai-Tibetan plateau

YANG Zeng-zeng^1,2, ZHANG Chun-ping^1,2, DONG Quan-min^1,2, YANG Xiao-xia^1,2, CHU Hui^1,2, LI Xiao-an^1,2, WEI Lin-na^1,2, ZHANG Yan-fen^1,2

1. Qinghai University of Animal Science and Veterinary Medicine, Key Laboratory of Province and Education Department of Yangtze and Yellow River Headwater Region Alpine meadow Ecology of Qinghai University, Xining, Qinghai Province 810016, China;
2. Academy of Animal and Veterinary Sciences, Qinghai University, Xining, Qinghai Province 810016, China

Received:2018-01-22 Revised:2018-07-23 Online:2018-10-15 Published:2018-11-06

补播对中度退化高寒草地群落特征和多样性的影响

杨增增^1,2, 张春平^1,2, 董全民^1,2, 杨晓霞^1,2, 褚晖^1,2, 李小安^1,2, 魏琳娜^1,2, 张艳芬^1,2

1. 青海大学畜牧兽医科学院, 青海大学省部共建三江源生态与高原农牧业国家重点试验室, 青海西宁 810016;
2. 青海省畜牧兽医科学院, 青海西宁 810016

通讯作者: 董全民
作者简介:杨增增(1992-),男,汉族,山西运城人,硕士研究生,主要从事草地生态与环境保护研究,E-mail:1034250007@qq.com
基金资助:
国家重点研发计划项目（2016YFC0501901-04）；青海省科技成果转化专项（2017-NK-149）资助

Abstract

Abstract: In order to study the effects of reseeding on the characteristics and vegetation diversity of alpine grassland,the moderately degraded "black beach" areas were chosen to study in this paper. The near-natural replanting methods (reseeding),which was conducted by no-tillage reseeding machine,was used to recover this degraded grassland. The community composition and diversity of the grassland after restoration were determined. Our results showed that,the coverage,aboveground and underground biomass,Poaceae herbage ratio and root-shoot ratio of degraded grassland increased significantly (P<0.05)after artificial reseeding,indicating that the reseeding had a good repairing effect. For species composition,its species community composition and important values of individual species changed after artificial reseeding. And the Poaceae and Cyperaceae herbage took an important position in the community. In addition,the species richness,Shannon-Weiner and evenness index all increased after artificial reseeding,but there's no significant difference between reseeding and the control. Overall,artificial reseeding is a quick-acting measure for the restoration of moderately degraded grassland in "black beach" land in alpine regions,which can effectively increase the proportion of edible pasture and improve grassland vegetation restoration in alpine regions.

Key words: “black beach” land, Reseeding, Community characteristics, Species diversity, Artificial measurement

摘要： 为研究补播对高寒草地群落特征和植被多样性的影响，本研究以黑土滩中度退化草地为对象，利用免耕补播机通过近自然补播措施进行了恢复，测定了恢复后草地的群落组成及多样性特征。结果表明：经人工补播后，退化草地的植被盖度，地上、地下生物量，禾本科牧草比例和根冠比都显著上升（P<0.05），补播措施起到了很好的修复效果。从物种组成上看，退化草地经过补播之后，其植被群落组成和物种重要值都发生了变化。其中，禾本科牧草和莎草科牧草占据了重要地位。此外，物种丰富度指数、Shannon-Weiner指数、均匀度指数经人工补播后都有所上升，但差异不显著。综上所述，人工补播是高寒地区黑土滩中度退化草地修复一种快速有效的措施，能够有效的提高可食牧草的比例，同时也有利于高寒地区草地植被恢复。

关键词: 黑土滩, 补播, 群落特征, 物种多样性, 人工干预措施

CLC Number:

Q948

YANG Zeng-zeng, ZHANG Chun-ping, DONG Quan-min, YANG Xiao-xia, CHU Hui, LI Xiao-an, WEI Lin-na, ZHANG Yan-fen. Effects of Reseeding on Plant Community Composition and Diversity of Moderately Degraded Alpine Grassland in Qinghai-Tibetan plateau[J]. Acta Agrestia Sinica, 2018, 26(5): 1071-1077.

杨增增, 张春平, 董全民, 杨晓霞, 褚晖, 李小安, 魏琳娜, 张艳芬. 补播对中度退化高寒草地群落特征和多样性的影响[J]. 草地学报, 2018, 26(5): 1071-1077.

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Effects of Reseeding on Plant Community Composition and Diversity of Moderately Degraded Alpine Grassland in Qinghai-Tibetan plateau

补播对中度退化高寒草地群落特征和多样性的影响

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