干旱区生态环境知识资源中心(Arid): Transpiration and canopy stomatal conductance dynamics of Mongolian pine plantations in semiarid deserts, Northern China

Arid

DOI	10.1016/j.agwat.2021.106806
	Transpiration and canopy stomatal conductance dynamics of Mongolian pine plantations in semiarid deserts, Northern China
	Deng, Jifeng; Yao, Jiaqi; Zheng, Xiao; Gao, Guanglei
通讯作者	Gao, GL (corresponding author), Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Qinghua East Rd 35, Beijing 100083, Peoples R China.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	249
英文摘要	Mongolian pine (Pinus sylvestris var. mongolica) plantations have ecological significance for desertification control and degraded land restoration in drought-induced regions. To date, knowledge about the dynamics of transpiration and canopy stomatal conductance (gs) of Mongolian pine in the semiarid deserts in Northern China is quite limited. Thus, better understanding its physical response to environmental factors and exploring the mechanisms of forest transpiration can offer a theoretical basis for a reasonable tree planting program in semi-arid regions. In this study, transpiration and gs changes in Mongolian pine plantations for a mature forest (MMPP), half-mature forest (HMPP), and young forest (YMPP) were obtained using sap flow observations, while simultaneously monitoring the atmospheric and soil moisture contents. The results showed that the canopy transpiration per unit leaf area (EL) averaged 0.97 mm d(-1), 0.60 mm d(-1), and 0.45 mm d(-1) in MMPP, HMPP, and YMPP, respectively, and the EL of Mongolian pine could be attributed to evaporative demand, soil moisture status, and gs. EL was obviously affected by air temperature, photosynthetic active radiation (PAR), and vapor pressure deficit (VPD) with the highest determined coefficient. The low values measured for the dimensionless coefficient (Omega = 0.041, 0.15, and 0.18) indicated that the canopy and the atmosphere were highly coupled. gs had more control over EL, and thus g(s) was more limited by VPD than that PAR. The average g(s) was 105.27, 105.26, and 99.44 mmol m(-2) s(-1) for MMPP, HMPP, and YMPP, respectively; Both MMPP and YMPP had lower sensitivity for stomatal regulation than HMPP, and the maximum gs was found in trees with both small and large tree diameters at breast height. Therefore, MMPP and YMPP were suspected to vary based on environmental conditions and were more susceptible to decline under mega drought conditions.
英文关键词	Mongolian pine plantations Transpiration Canopy stomatal conductance Vapor pressure deficit Decoupling dimensionless coefficient Water regulation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000632323300003
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349333
作者单位	[Deng, Jifeng; Yao, Jiaqi; Zheng, Xiao] Shenyang Agr Univ, Coll Forestry, Dongling St 120, Shenyang 110866, Liaoning, Peoples R China; [Deng, Jifeng; Yao, Jiaqi] Key Lab Forest Tree Genet & Breeding Liaoning Pro, Dongling St 120, Shenyang 110866, Liaoning, Peoples R China; [Zheng, Xiao] Fushun Min Ind Grp Co Ltd, Forestry Bur, Qingnian East Rd 25, Fushun 210400, Liaoning, Peoples R China; [Gao, Guanglei] Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Qinghua East Rd 35, Beijing 100083, Peoples R China; [Gao, Guanglei] Beijing Forestry Univ, Key Lab State Forestry & Grassland Adm Soil & Wat, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Deng, Jifeng,Yao, Jiaqi,Zheng, Xiao,et al. Transpiration and canopy stomatal conductance dynamics of Mongolian pine plantations in semiarid deserts, Northern China[J]. 北京林业大学,2021,249.
APA	Deng, Jifeng,Yao, Jiaqi,Zheng, Xiao,&Gao, Guanglei.(2021).Transpiration and canopy stomatal conductance dynamics of Mongolian pine plantations in semiarid deserts, Northern China.AGRICULTURAL WATER MANAGEMENT,249.
MLA	Deng, Jifeng,et al."Transpiration and canopy stomatal conductance dynamics of Mongolian pine plantations in semiarid deserts, Northern China".AGRICULTURAL WATER MANAGEMENT 249(2021).