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DOI10.1016/j.scitotenv.2018.08.025
Divergent responses to water and nitrogen addition of three perennial bunchgrass species from variously degraded typical steppe in Inner Mongolia
Zhang, Hongxiang1; Gao, Yingzhi2; Tasisa, Buli Yohannis2,6; Baskin, Jerry M.3; Baskin, Carol C.3,4; Lu, Xiao-Tao5; Zhou, Daowei1
发表日期2019
ISSN0048-9697
EISSN1879-1026
卷号647页码:1344-1350
英文摘要

Water and nitrogen (N) availability to plants are spatially and temporally variable in arid and semi-arid grasslands. We aimed to investigate the eco-physiological responses of three bunchgrass species to water and N addition along a gradient of habitat degradation in the Inner Mongolian typical grasslands. The effects of water and N addition on aboveground and belowground growth and biomass allocation and water- and nitrogen-use efficiency (WUE and NUE) of Stipa grandis, Agropyron cristatum and Cleistogenes squarrosa from non-degraded, moderately-degraded and heavily-degraded grasslands, respectively, were compared. Stipa grandis had higher specific root length and WUE than C. squarrosa, while C. squarrosa had higher NUE than S. grandis in waterand N-limited conditions. Responses of A. cristatum were intermediate between those of S. grandis and C. squarrosa. Water and N addition did not have a significant effect on growth and biomass allocation of S. grandis, but it increased growth and leaf biomass allocation of A. cristatum and growth and stem biomass allocation of C. squarrosa. The three species differ in WUE, NUE, biomass allocation and responses to water and N addition, and these differences are adaptive to their respective habitats. The degraded grasslands can be restored by an increase in water and N availability such as is expected to occur via climatic change, but S. grandis will not benefit from the increases. (C) 2018 Elsevier B.V. All rights reserved.


WOS研究方向Environmental Sciences & Ecology
来源期刊SCIENCE OF THE TOTAL ENVIRONMENT
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/92004
作者单位1.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Jilin Prov Lab Grassland Farming, Changchun 130102, Jilin, Peoples R China;
2.Northeast Normal Univ, Inst Grassland Sci, Changchun 130024, Jilin, Peoples R China;
3.Univ Kentucky, Dept Biol, Lexington, KY 40506 USA;
4.Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA;
5.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Liaoning, Peoples R China;
6.Dambi Dollo Univ, Dept Plant Biol & Biodivers Management, Dambi Dollo 260, Ethiopia
推荐引用方式
GB/T 7714
Zhang, Hongxiang,Gao, Yingzhi,Tasisa, Buli Yohannis,et al. Divergent responses to water and nitrogen addition of three perennial bunchgrass species from variously degraded typical steppe in Inner Mongolia[J],2019,647:1344-1350.
APA Zhang, Hongxiang.,Gao, Yingzhi.,Tasisa, Buli Yohannis.,Baskin, Jerry M..,Baskin, Carol C..,...&Zhou, Daowei.(2019).Divergent responses to water and nitrogen addition of three perennial bunchgrass species from variously degraded typical steppe in Inner Mongolia.SCIENCE OF THE TOTAL ENVIRONMENT,647,1344-1350.
MLA Zhang, Hongxiang,et al."Divergent responses to water and nitrogen addition of three perennial bunchgrass species from variously degraded typical steppe in Inner Mongolia".SCIENCE OF THE TOTAL ENVIRONMENT 647(2019):1344-1350.
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