Sap flow characteristics and responses to summer rainfall for Pinus tabulaeformis and Hippophae rhamnoides in the Loess hilly region of China

doi:10.1002/ece3.3639

ISWC OpenIR > 水保所科研产出--SCI > 2018--SCI

	Sap flow characteristics and responses to summer rainfall for Pinus tabulaeformis and Hippophae rhamnoides in the Loess hilly region of China
	Wu, Xu 1,2; Tang, Yakun 3; Chen, Yunming 1,3; Wen, Jie 4; Xie, Yuli 1,2; Lu, Senbao 4; Chen, YM (reprint author), Chinese Acad Sci, Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dry Land Farming Loess, Yangling, Shaanxi, Peoples R China.
文章类型	Article
	2018
发表期刊	ECOLOGY AND EVOLUTION
ISSN	2045-7758
通讯作者邮箱	ymchen@ms.iswc.ac.cn
卷号	8 期号:1 页码:617-630
摘要	As a major driving element of the structure and function of arid and semiarid ecosystems, rainfall is the essential factor limiting plant biological processes. To clarify the characteristics of transpiration and responses to summer rainfall, sap flow density (F-d) of Pinus tabulaeformis and Hippophae rhamnoides was monitored using thermal dissipation probes. In addition, midday leaf water potential (psi(m)) and leaf stomatal conductance (G(s)) were also analyzed to determine water use strategies. The results indicated that the diurnal variation in the normalized F-d values exhibited a single-peak curve for P.tabulaeformis, while H.rhamnoides showed multiple peaks. The normalized F-d for P.tabulaeformis remained relatively stable regardless of rainfall events. However, there was also a significant increase in the normalized F-d for H.rhamnoides in response to rainfall in June and August (p < .05), although no significant differences were observed in July. The normalized F-d values for P.tabulaeformis and H.rhamnoides fitted well with the derived variable of transpiration, an integrated index calculated from the vapor pressure deficit and solar radiation (R-s), using an exponential saturation function. The differences in fitting coefficients suggested that H.rhamnoides showed more sensitivity to summer rainfall (p < .01) than P.tabulaeformis. Furthermore, during the study period, P.tabulaeformis reduced G(s) as soil water decreased, maintaining a relatively constant psi(m); while H.rhamnoides allowed large fluctuations in (m) to maintain G(s). Therefore, P.tabulaeformis and H.rhamnoides should be considered isohydric and anisohydric species, respectively. And more consideration should be taken for H.rhamnoides in the afforestation activities and the local plantation management under the context of the frequently seasonal drought in the loess hilly region.
关键词	Anisohydric Hippophae Rhamnoides Isohydric Pinus Tabulaeformis Sap Flow
学科领域	Ecology ; Evolutionary Biology
DOI	10.1002/ece3.3639
收录类别	SCI
出版地	111 RIVER ST, HOBOKEN 07030-5774, NJ USA
语种	英语
WOS记录号	WOS:000419483200053
出版者	WILEY
引用统计
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/7859
专题	水保所科研产出--SCI_2018--SCI
通讯作者	Chen, YM (reprint author), Chinese Acad Sci, Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dry Land Farming Loess, Yangling, Shaanxi, Peoples R China.
作者单位	1.Chinese Acad Sci, Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dry Land Farming Loess, Yangling, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Northwest Agr & Forestry Univ, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 4.Northwest Agr & Forestry Univ, Coll Forestry, Yangling, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wu, Xu,Tang, Yakun,Chen, Yunming,et al. Sap flow characteristics and responses to summer rainfall for Pinus tabulaeformis and Hippophae rhamnoides in the Loess hilly region of China[J]. ECOLOGY AND EVOLUTION,2018,8(1):617-630.
APA	Wu, Xu.,Tang, Yakun.,Chen, Yunming.,Wen, Jie.,Xie, Yuli.,...&Chen, YM .(2018).Sap flow characteristics and responses to summer rainfall for Pinus tabulaeformis and Hippophae rhamnoides in the Loess hilly region of China.ECOLOGY AND EVOLUTION,8(1),617-630.
MLA	Wu, Xu,et al."Sap flow characteristics and responses to summer rainfall for Pinus tabulaeformis and Hippophae rhamnoides in the Loess hilly region of China".ECOLOGY AND EVOLUTION 8.1(2018):617-630.

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