干旱区生态环境知识资源中心(Arid): 干旱荒漠区不同生活型植物生长对降雨量变化的响应

Arid

	干旱荒漠区不同生活型植物生长对降雨量变化的响应
其他题名	Responses of plant growth of different life forms to rainfall amount changes in an arid desert area
	张浩; 王新平; 张亚峰; 虎瑞; 潘颜霞; 陈宁
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2015
卷号	34 期号:7 页码:1847-1853
中文摘要	降水是荒漠生态系统过程和功能的最重要限制因子,荒漠生态系统中的植物物种对生长季降雨的变化极端敏感。根据生长季内每次降雨量,进行不同梯度的人工模拟降雨试验(减雨50%、减雨25%、增雨25%、增雨50%、增雨100%),以自然降雨为对照,研究植物生长对降雨量变化的响应。结果表明:生长季降雨量影响植物的生长和初级生产力,不同生活型植物对降雨量变化的响应显著不同;减雨处理减缓了柠条、油蒿新枝生长,但影响不显著;增雨25%未能显著促进柠条、油蒿新枝生长;50%增雨未能促进柠条新枝生长而能促进油蒿的新枝生长;57月,增雨100%能显著增加油蒿新枝生长量,仅能增加柠条67月生长量;1年生草本植物地上部分生物量随降雨量增加呈线性增加趋势,减雨50%显著降低了草本植物株高,而其他降雨处理对株高影响不显著。
英文摘要	Precipitation is the chief limiting factor for the processes and functions of desert ecosystems, and the plant species are extremely sensitive to precipitation variations during growing seasons. Artificial rainfall simulation experiments were conducted upon desert plants of different life forms to assess the responses of plant growth to rainfall changes. According to the rainfall amount in the growing season of 2013,rainfall amount was reduced by 25% or 50%,or increased by 25%, 50% or 100%, with natural rainfall as the control. The results showed that precipitation changes in growing season affected the growth of plants and the primary productivity,and significant differences were found in the response to rainfall amount between plants of varying life forms. Reduced precipitation slowed down the new branch growth of Caragana korshinskii and Artemisia ordosica, though the change was not significant. Rainfall increase by 25% did not significantly promote the growth of C. korshinskii and A. ordosica. Rainfall increase by 50% significantly promoted the new branch growth of A. ordosica, but not C. korshinskii. Between May and July, rainfall increase by 100% significantly promoted the new branch growth of A. ordosica,and so was it for C. korshinskii between June and July. The aboveground biomass of annual herbaceous plants significantly linearly increased with rainfall amount in the growing season and plant height significantly decreased only in plots with rainfall reduction by 50%.
中文关键词	减雨 ; 增雨 ; 新枝生长量 ; 地上部分生物量
英文关键词	reduced precipitation increased precipitation new branch growth aboveground biomass
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:5469665
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/2XILL650/233234
作者单位	中国科学院寒区旱区环境与工程研究所, 中国科学院沙坡头沙漠研究试验站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	张浩,王新平,张亚峰,等. 干旱荒漠区不同生活型植物生长对降雨量变化的响应[J]. 中国科学院西北生态环境资源研究院,2015,34(7):1847-1853.
APA	张浩,王新平,张亚峰,虎瑞,潘颜霞,&陈宁.(2015).干旱荒漠区不同生活型植物生长对降雨量变化的响应.生态学杂志,34(7),1847-1853.
MLA	张浩,et al."干旱荒漠区不同生活型植物生长对降雨量变化的响应".生态学杂志 34.7(2015):1847-1853.