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兰州大学机构库  > 草地农业科技学院  > 期刊论文
题名: Responses of photosynthesis and water relations to rainfall in the desert shrub creosote bush (Larrea tridentata) as influenced by municipal biosolids
作者: Yan, SG; Wan, CG; Sosebee, RE; Wester, DB; Fish, EB; Zartman, RE
收录类别: SCIE
出版日期: 2000
刊名: JOURNAL OF ARID ENVIRONMENTS
卷号: 46, 期号:4, 页码:397-412
出版者: ACADEMIC PRESS LTD
出版地: LONDON
英文摘要: Responses of photosynthesis (P-n), stomatal conductance (g(s)), pre-dawn leaf water potential (Psi (1p)) and leaf water content (omega (1)) of creosote bush to 10 rainfall events in the Chihuahuan Desert were investigated. Infiltration of rainwater was manipulated by applying municipal biosolids. The responses of P-n and water relation parameters to rainfall ( > 10 mm) were mainly dependent upon drought severity: (1) following a moderate drought, P-n, g(s), Psi (1p) and omega (1) recovered to corresponding values of irrigated plants within 2 days after a 23-mm rainfall; (2) Psi (1p) and g(s) responded to a 15-mm rainfall within 2 days, following a 25-day drought, whereas responses of P-n and w, were delayed for several days; (3) responses of P-n, g(s), Psi (1p) and omega (1) to a 14.7-mm rainfall were all delayed for several weeks following a 110-day drought, but the delay was longer in P-n, g(s) and omega (1) than in Psi (1p). Creosote bush responded to small rainfall events (approximately 6 to 8 mm) with an increase in Psi (1p), but without noticeable changes in g(s) and P-n, suggesting a strong stomatal control of water loss even though xylem embolism was reduced. Biosolids applied at high rates (3.4 and 9 kg m(-2)) decreased the soil water by 2 to 4 mm following rainfall events, and this in turn delayed and decreased the responses of P-n and water relation parameters to rainfall. P-n and g(s) were linearly related to omega (1) and exponentially related to Psi (1p). With the generally coincidental responses of P-n or g(s) and omega (1) to rainfall, We concluded that the responses of P-n and g(s) to rainfall were dependent on leaf rehydration which resulted from restored hydraulic conductance following drought.
关键词: photosynthesis ; water relations ; drought ; recovery ; Larrea tridentata
作者部门: Texas Tech Univ, Dept Range Wildlife & Fisheries Management, Lubbock, TX 79409 USA ; Texas Tech Univ, Dept Plant & Soil Sci, Lubbock, TX 79409 USA ; Gansu Grassland Ecol Res Inst, Lanzhou 730020, Peoples R China
通讯作者: Wan, CG (reprint author), Texas Tech Univ, Dept Range Wildlife & Fisheries Management, Lubbock, TX 79409 USA.
学科分类: Environmental Sciences & Ecology
文章类型: Article
语种: 英语
DOI: 10.1006/jare.2000.0682
ISSN号: 0140-1963
WOS记录号: WOS:000166370400006
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/113519
Appears in Collections:草地农业科技学院_期刊论文

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Recommended Citation:
Yan, SG,Wan, CG,Sosebee, RE,et al. Responses of photosynthesis and water relations to rainfall in the desert shrub creosote bush (Larrea tridentata) as influenced by municipal biosolids[J]. JOURNAL OF ARID ENVIRONMENTS,2000,46(4):397-412.
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