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[1]陈冬明,张楠楠,刘琳,等.不同恢复措施对若尔盖沙化草地的恢复效果比较[J].应用与环境生物学报,2016,22(22卷04):573-578.[doi:10.3724/SP.J.1145.2016.05007]
 CHEN Dongming,ZHANG Nannan,et al.The effect of different restoration measures on the desertified alpine grassland in Zoigê[J].Chinese Journal of Applied & Environmental Biology,2016,22(22卷04):573-578.[doi:10.3724/SP.J.1145.2016.05007]
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不同恢复措施对若尔盖沙化草地的恢复效果比较 ()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
22卷
期数:
2016年22卷04期
页码:
573-578
栏目:
高寒生态系统的结构、功能与动态专栏
出版日期:
2016-08-25

文章信息/Info

Title:
The effect of different restoration measures on the desertified alpine grassland in Zoigê
作者:
陈冬明张楠楠刘琳仲波唐中林严文超徐良英孙庚
1中国科学院成都生物研究所,中国科学院山地生态恢复与生物资源利用重点实验室,生态恢复与生物多样性保育四川省重点实验室 成都 610041 2四川农业大学动物科技院草学系 成都 611130 3贵州大学动物科学学院?? 贵阳 ?550025 4四川省九寨沟风景名胜区管理局 九寨沟 623400
Author(s):
CHEN Dongming1 2 ZHANG Nannan1 LIU Lin2 ZHONG Bo1 3 TANG Zhonglin1 YAN Wenchao1 XU Liangying4 & SUN Geng1**
1Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China 2Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China 3College of Animal Science, Guizhou University, Guiyang, 550025, China 4Jiuzhaigou Scenic Area Administration Bureau, Jiuzhaigou 623400, China
关键词:
若尔盖沙化草地放牧恢复
Keywords:
Zoigê grassland desertification grazing restoration
分类号:
X171.4 (271)
DOI:
10.3724/SP.J.1145.2016.05007
摘要:
若尔盖高原是黄河上游主要的水源补给地,也是我国重要的生态安全屏障区,但近年来由于超载过牧、气候变化、鼠害等原因出现了严重的沙化问题. 通过比较分析合理放牧、围封禁牧以及自然恢复3种恢复措施对若尔盖典型沙化草地植物群落结构、生物量和土壤理化性质的恢复效果. 结果显示,恢复6年后,自然恢复草地恢复效果不明显,而合理放牧草地恢复效果最好. 与自然恢复和围封禁牧恢复草地相比,(1)合理放牧使得草地植物群落盖度、物种丰富度、地上生物量和地下生物量显著增加,分别为93%、9、396.41 g/m2和693.4 g/m2;(2)合理放牧恢复草地土壤容重、pH显著降低;含水量、最大持水量、可溶性全氮、硝态氮、可溶性有机氮和可溶性有机碳显著增加. 本研究表明合理放牧有利于沙化草地更快恢复,建议制定相关标准在适当区域进行应用和推广. (图2 表2 参37)
Abstract:
Zoigê plateau wetland is the third-largest peat swamp wetland in China. Ecological security of Zoigê plateau wetland is not only related to biomass production, but also to the ecological balance of the Yellow River Basin. In recent years, due to overgrazing and other factors, Zoigê grassland has suffered serious degradation and desertification, which have decreased grassland productivity, and caused other serious ecological problems. Enclosure following reseeding is considered the most effective way to restore desertified grassland. On the other hand, some researchers and local herdsmen have found reasonable grazing after reseeding and early period enclosure more conducive to the restoration of the desertified grassland by increasing the plant community coverage, the number of species, and gross primary production. To compare the effect of these two recovery strategies, we measured the aboveground biomass, underground biomass, soil physical and chemical properties, soil microbial carbon, soil microbial nitrogen and release rate of root exudates from the root of Elymus nutans. The results showed that, after 6 years of restoration, compared with enclosure, grazing significantly increased plant community coverage (93%), species richness (9), aboveground biomass (396.41 g m-2) and 0-20 cm underground biomass (693.46 g m-2)in the grassland. The degraded grassland with grazing showed significantly decreased soil bulk density but significantly increased soil water content, maximum moisture capacity, soil pH, total soluble nitrogen, nitrate nitrogen, dissolved organic nitrogen, and dissolved organic carbon. The results indicated that the reasonable grazing is more conducive than enclosure to the restoration of vegetation and soil physical and chemical properties of degraded grasslands.

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更新日期/Last Update: 2016-08-25