干旱区生态环境知识资源中心(Arid): 增温、刈割对高寒草甸地上植被生长的影响

Arid

	增温、刈割对高寒草甸地上植被生长的影响
其他题名	Effects of Warming and Clipping on the Growth of Aboveground Vegetation in An Alpine Meadow
	徐满厚 1; 刘敏 1; 薛娴 2; 翟大彤 1; 彭飞 2; 尤全刚 2; 刘洋 3
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2015
卷号	24 期号:2 页码:231-236
中文摘要	近些年由于气候变化和土地利用方式变化的双重影响,高寒草甸植被逐渐表现出退化现象。探讨高寒草甸植被生长特征在气候变化和人类活动中的动态变化规律,对高海拔地区植被的保护和合理利用,防止草地退化和沙漠化发生具有重要意义。以青藏高原高寒草甸为研究区,利用增温实验模拟气候变暖、刈割实验模拟人类放牧,采用随机区组设计,设置对照、增温、刈割、增温+刈割交互作用四种实验处理,于2012─2013年植被生长季调查高度、盖度和地上生物量,研究高寒草甸地上植被生长特征对增温、刈割的响应,以此探讨青藏高原高寒草甸地上植被在气候变化和人类活动中的变化趋势。结果表明:(1)夏季是高寒草甸植被生长的最佳季节,其中7月是其生长的最佳月份;高寒草甸地上植被生长特征年内生长季和年际间的变化趋势差异较大,表现为植被高度在生长季中期高于初期和末期(P<0.05),植被盖度和地上生物量在生长季中期和末期高于初期(P<0.05);2012年的植被高度和地上生物量略高于2013年(P>0.05),但植被盖度略低于2013年(P>0.05)。(2)植被高度、盖度和地上生物量在增温第2年(2012年)的各实验处理间均未出现显著差异(P>0.05),而在第3年(2013年)开始出现显著差异(P<0.05),其中2年刈割显著降低植被高度和地上生物量(P<0.05),3年增温和2年刈割的交互作用显著降低植被盖度和地上生物量(P<0.05)。以上结果表明,增温、刈割对高寒草甸地上植被生长的影响在短期和长期尺度上存有差异,初期并不显著,但随着时间推移,影响开始加强。
英文摘要	In recent years, alpine meadow vegetation increasingly exhibits a phenomenon of degradation, owing to the double effects of climate change and land use change. In such situation, discussing the dynamic law of alpine meadow vegetation in climate change and human activities has great significance for the protection and effective utilization of alpine vegetation, as well as to the prevention of grassland degradation or desertification in high-altitude regions. In this research, we chose an alpine meadow of the Qinghai-Tibetan Plateau as the study area, and adopted experimental warming to simulate climate warming and clipping to mimic human grazing, and set four treatments with the random block design including control, warming alone, clipping alone, and the interaction of warming and clipping. We measured vegetation height, coverage, and aboveground biomass in the growing season (from May to September) of the alpine meadow in 2012 and 2013. The aim was to study the responses of aboveground vegetation to warming and clipping, and further explored the characteristics and trends of aboveground vegetation in climate change and human activities in the alpine meadow of the Qinghai-Tibetan Plateau. The results showed that (1) summer was the best season and July was the best month for vegetation growth in the alpine meadow. But the variations of vegetation growth properties were greater in the different months of the growing season and different years. Vegetation height was greater in the middle growing season than the early and late growing season (P<0.05), whereas vegetation coverage and aboveground biomass were greater in the middle and late growing season than the early growing season (P<0.05). Vegetation height and aboveground biomass were slightly larger in 2012 than 2013 (P>0.05), whereas vegetation coverage was slightly smaller in 2012 than 2013 (P>0.05). (2) Vegetation height, coverage, and aboveground biomass were all not significant between treatments in the second year of warming (2012, P>0.05), whereas reached significant differences in the third year of warming (2013, P<0.05). 2-year clipping significantly reduced vegetation height and aboveground biomass (P<0.05), whereas the interaction of 3-year warming and 2-year clipping significantly decreased vegetation coverage and aboveground biomass (P<0.05). The above results demonstrated that the effects of warming and clipping on aboveground vegetation of the alpine meadow had differences between short-term and long-term scales, i.e. the effects were not significant in the early stage, but enhanced with passing time. However, this conclusion needs more data to be explained deeply.
中文关键词	高寒草甸 ; 增温 ; 刈割 ; 地上植被
英文关键词	alpine meadow warming clipping aboveground vegetation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5396724
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233106
作者单位	1.太原师范学院地理科学学院, 太原, 山西 030619, 中国; 2.中国科学院寒区旱区环境与工程研究所, 中国科学院沙漠与沙漠化重点实验室, 兰州, 甘肃 730000, 中国; 3.伊犁职业技术学院, 伊宁, 新疆 835000, 中国
推荐引用方式 GB/T 7714	徐满厚,刘敏,薛娴,等. 增温、刈割对高寒草甸地上植被生长的影响[J]. 中国科学院西北生态环境资源研究院,2015,24(2):231-236.
APA	徐满厚.,刘敏.,薛娴.,翟大彤.,彭飞.,...&刘洋.(2015).增温、刈割对高寒草甸地上植被生长的影响.生态环境学报,24(2),231-236.
MLA	徐满厚,et al."增温、刈割对高寒草甸地上植被生长的影响".生态环境学报 24.2(2015):231-236.