干旱区生态环境知识资源中心(Arid): Dynamical effects of plastic mulch on evapotranspiration partitioning in a mulched agriculture ecosystem: Measurement with numerical modeling

Arid

DOI	10.1016/j.agrformet.2019.01.014
	Dynamical effects of plastic mulch on evapotranspiration partitioning in a mulched agriculture ecosystem: Measurement with numerical modeling
	Wang, Pei 1,2; Deng, Yujing 2; Li, Xiao-Yan 1,2; Wei, Zhongwang 3; Hu, Xia 1,2; Tian, Fei 4; Wu, Xiuchen 1,2; Huang, Yongmei 1,2; Ma, Yu-Jun 1,2; Zhang, Cicheng 2; Wang, Yang 2; Li, Engui 2; Wang, Jiaqi 2
通讯作者	Wang, Pei
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2019
卷号	268 页码:98-108
英文摘要	Mulching is a common and effective practice to artificially reduce evaporation for the purposes of water conservation in arid/semiarid ecosystems. Few studies have quantified the effects of plastic mulch on evapotranspiration (ET) partitioning impacted by different biophysical processes between bare and mulch-covered soil within a soil-mulch-plant-atmosphere continuum. Here, we partitioned ET flux into bare soil evaporation (E-bs), mulch-covered soil evaporation (E-ms) and transpiration (T) in an oasis cropland ecosystem that was partially covered by plastic film, using an improved multisource energy balance model. The modeled water/energy fluxes agreed well with those measured by the eddy covariance. The modeled surface temperatures of both bare soil and mulch-covered soil were also consistent with measured fluxes, with a high R-2 (0.81). During the growing season, the mean fractional contribution to total ET was 21 +/- 12%, 6 +/- 4%, and 73 +/- 14% for E-bs, E-ms and T, respectively. Comparisons of modeled output with and without considering mulching effects indicate that mulching increases the T/ET by decreasing E (0.02 +/- 0.02 mm h(-1)), with a mean value of 7.2% and a range of 0-16% during the growing season. Mulching also increases soil temperature, while decreasing available energy at the land surface. These results show that the effects of mulching on ET partitioning varied with leaf development and were more sensitive during periods characterized by a lower leaf area index (e.g., the initial growing period and the period after clear cutting). Without considering mulch effects, the ET (E/ET) flux would be an overestimate, mainly because soil resistance and the availability of soil water would be underestimated. This study highlights the potential of plastic film mulch as a viable management option for soil water conservation and improving soil temperature, which is crucial for plant growth in arid and semiarid ecosystems.
英文关键词	Mulching Evapotranspiration partitioning Numerical modeling Soil-mulch-plant-atmosphere continuum Soil temperature Energy budget
类型	Article
语种	英语
国家	Peoples R China ; Japan
收录类别	SCI-E
WOS记录号	WOS:000460844700011
WOS关键词	ENERGY-BALANCE CLOSURE ; WATER-USE EFFICIENCY ; GRAVEL MULCH ; EDDY-COVARIANCE ; SOIL EVAPORATION ; RIVER-BASIN ; TEMPERATURE ; TRANSPIRATION ; MAIZE ; YIELD
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构	北京师范大学 ; 中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213942
作者单位	1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; 2.Beijing Normal Univ, Sch Nat Resources, Fac Geog Sci, Beijing 100875, Peoples R China; 3.Univ Tokyo, Dept Civil Engn, River & Environm Engn Lab, Tokyo, Japan; 4.China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Wang, Pei,Deng, Yujing,Li, Xiao-Yan,et al. Dynamical effects of plastic mulch on evapotranspiration partitioning in a mulched agriculture ecosystem: Measurement with numerical modeling[J]. 北京师范大学, 中国农业大学,2019,268:98-108.
APA	Wang, Pei.,Deng, Yujing.,Li, Xiao-Yan.,Wei, Zhongwang.,Hu, Xia.,...&Wang, Jiaqi.(2019).Dynamical effects of plastic mulch on evapotranspiration partitioning in a mulched agriculture ecosystem: Measurement with numerical modeling.AGRICULTURAL AND FOREST METEOROLOGY,268,98-108.
MLA	Wang, Pei,et al."Dynamical effects of plastic mulch on evapotranspiration partitioning in a mulched agriculture ecosystem: Measurement with numerical modeling".AGRICULTURAL AND FOREST METEOROLOGY 268(2019):98-108.