干旱区生态环境知识资源中心(Arid): Estimating sunflower canopy conductance under the influence of soil salinity

Arid

DOI	10.1016/j.agrformet.2021.108778
	Estimating sunflower canopy conductance under the influence of soil salinity
	Wang, Weishu; Rong, Yao; Wang, Xingwang; Wang, Chaozi; Zhang, Chenglong; Huo, Zailin; Huang, Guanhua
通讯作者	Huo, ZL
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2022
卷号	314
英文摘要	Canopy conductance (gc) is the key parameter to quantify eco-hydrology processes. Salinity stress is one of the most important abiotic stresses to growth of crops in arid and semi-arid areas. Understanding the influence of salinity on stomatal movement and accurately describing gc under salt stress are of great significance to quantify agro-hydrology processes affected by salt. Therefore, we measured stomata conductance (gs) of sunflower leaves at different growth stages and soil salinity conditions in two consecutive years. At the same time, the evapotranspiration above canopy and the dynamic changes of soil moisture and salinity in root zone were continuously monitored. It was found that under the same meteorological conditions, leaf gs decreased with the increase of soil salt content. Relatively, gs was more sensitive to salt at seedling and maturity stages than at budding and flowering stages. Furthermore, an empirical formula describing the effect of soil salinity on gs was added to the Jarvis multi-factor multiplication gs model, which used leaf area index (LAI) as a parameter to express the salt tolerance of different growth stages. Effective LAI was used to upgrade the model from leaf scale to canopy scale. gc calculated by Penman-Monteith equation using the farmland canopy evapotranspiration measured by the eddy covariance system was used to evaluate the applicability of model. The results showed that the model could simulate gc well on both the half-hour and the daily average scale. Nash-Sutcliffe efficiency coefficient of the daily average scale model was about 0.65, and determination coefficient of the simulation results of different scales in two years were all above 0.66. Our findings could improve the understanding of influence of salinity on stomatal movement in such areas and provided a basis for simulating canopy evapotranspiration and photosynthesis under salt stress.
英文关键词	Stomata Canopy conductance Salt stress Leaf area index Model
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000795820600001
WOS关键词	STOMATAL CONDUCTANCE ; SURFACE CONDUCTANCE ; ION ACCUMULATION ; PENMAN-MONTEITH ; FOOTPRINT MODEL ; SALT STRESS ; ZEA-MAYS ; WATER ; TRANSPIRATION ; GROWTH
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391566
推荐引用方式 GB/T 7714	Wang, Weishu,Rong, Yao,Wang, Xingwang,et al. Estimating sunflower canopy conductance under the influence of soil salinity[J],2022,314.
APA	Wang, Weishu.,Rong, Yao.,Wang, Xingwang.,Wang, Chaozi.,Zhang, Chenglong.,...&Huang, Guanhua.(2022).Estimating sunflower canopy conductance under the influence of soil salinity.AGRICULTURAL AND FOREST METEOROLOGY,314.
MLA	Wang, Weishu,et al."Estimating sunflower canopy conductance under the influence of soil salinity".AGRICULTURAL AND FOREST METEOROLOGY 314(2022).