干旱区生态环境知识资源中心(Arid): Water Use by Chinese Pine Is Less Conservative but More Closely Regulated Than in Mongolian Scots Pine in a Plantation Forest, on Sandy Soil, in a Semi-Arid Climate

Arid

DOI	10.3389/fpls.2021.635022
	Water Use by Chinese Pine Is Less Conservative but More Closely Regulated Than in Mongolian Scots Pine in a Plantation Forest, on Sandy Soil, in a Semi-Arid Climate
	Dang, Hongzhong; Zhang, Xueli; Han, Hui; Chen, Shuai; Li, Mingyang
通讯作者	Dang, HZ (corresponding author), Chinese Acad Forestry, Inst Desertificat Studies, Beijing, Peoples R China.
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2021
卷号	12
英文摘要	The diversity of plant water use patterns among species and ecosystems is a matter of widespread debate. In this study, Chinese pine (Pinus tabuliformis, CP) and Mongolian Scots pine (Pinus sylvestris var. mongolica, MP), which is co-exist in the shelterbelt plantations in the Horqin Sandyland in northern China, were chosen for comparison of water use traits by monitoring xylem sap flow alongside recordings of the associated environmental factors over four growing seasons. Continuous sap flux density measurements were converted into crown projected area transpiration intensity (T-r) and canopy stomatal conductance (G(s)). The results indicated that MP showed a higher canopy transpiration intensity than in CP, with T-r daily means (+/- standard deviation) of 0.84 +/- 0.36 and 0.79 +/- 0.43 mm.d(-1), respectively (p = 0.07). However, the inter-annual variability of daily T-r in MP was not significant, varying only approximately a 1.1-fold (p = 0.29), while inter-annual variation was significant for CP, with 1.24-fold variation (p < 0.01). In particular, the daily mean T-r value for CP was approximately 1.7-times higher than that of MP under favorable soil moisture conditions, with values for relative extractable soil water within the 0-1.0 m soil layer (REW) being above 0.4. However, as the soil dried out, the value of T-r for CP decreased more sharply, falling to only approximately 0.5-times the value for MP when REW fell to < 0.2. The stronger sensitivity of T-r and/or G(s) to REW, together with the more sensitive response of G(s) to VPD in CP, confirms that CP exhibits less conservation of soil water utilization but features a stronger ability to regulate water use. Compared with MP, CP can better adapt to the dry conditions associated with climate change.
英文关键词	Pinus sylvestris var mongolica Pinus tabuliformis sap flux density canopy transpiration canopy stomatal conductance
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000642423500001
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368860
作者单位	[Dang, Hongzhong; Chen, Shuai; Li, Mingyang] Chinese Acad Forestry, Inst Desertificat Studies, Beijing, Peoples R China; [Zhang, Xueli; Han, Hui] Inst Sandy Land Management & Utilizat, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Dang, Hongzhong,Zhang, Xueli,Han, Hui,et al. Water Use by Chinese Pine Is Less Conservative but More Closely Regulated Than in Mongolian Scots Pine in a Plantation Forest, on Sandy Soil, in a Semi-Arid Climate[J],2021,12.
APA	Dang, Hongzhong,Zhang, Xueli,Han, Hui,Chen, Shuai,&Li, Mingyang.(2021).Water Use by Chinese Pine Is Less Conservative but More Closely Regulated Than in Mongolian Scots Pine in a Plantation Forest, on Sandy Soil, in a Semi-Arid Climate.FRONTIERS IN PLANT SCIENCE,12.
MLA	Dang, Hongzhong,et al."Water Use by Chinese Pine Is Less Conservative but More Closely Regulated Than in Mongolian Scots Pine in a Plantation Forest, on Sandy Soil, in a Semi-Arid Climate".FRONTIERS IN PLANT SCIENCE 12(2021).