干旱区生态环境知识资源中心(Arid): 基于改进S-W与结构方程模型的干旱区枣园蒸散特征分析

Arid

	基于改进S-W与结构方程模型的干旱区枣园蒸散特征分析
其他题名	Analysis of Evapotranspiration Characteristics of Ziziphus jujuba Mill. Orchards in Arid Areas Based on Improved S-W and Structural Equation Model
	乔英; 马英杰; 辛明亮
来源期刊	农业机械学报
ISSN	1000-1298
出版年	2021
卷号	52 期号:8 页码:1000-1298
中文摘要	为准确量化蒸散及其组分、分析蒸散的控制机制,利用改进的Shuttleworth-Wallace模型(S-W)对干旱区滴灌枣园的蒸散量、植株蒸腾量进行模拟,使用两年的涡度相关系统、针式茎流计数据对模型进行参数率定及验证,并利用结构方程模型(Structural equation model,SEM)分析枣园蒸散与其影响因子之间的关系。结果表明:S-W模型在干旱区枣园有较好的适用性,适宜的模型参数a_1为6.944 5、g_0为0.0439、b_2为4.604 1、b_3为957.110 6;蒸散量模拟精度为:均方根误差(RMSE)为0.62~0.76 mm/d,回归系数b为0.77~0.88,决定系数R~2为0.95~0.97,一致性指数d为0.92~0.94,模型效率纳什系数(EF)为0.70~0.81,均方根误差与观测值标准差比率(RSR)为0.44~0.55。SEM模型显示,6个测量因子能够解释89%的植株蒸腾量、84%的土壤蒸发量,植株蒸腾量对土壤蒸发量的标准化总影响系数为-0.70。对植株蒸腾量影响最大的因子是叶面积指数,标准化总影响系数为0.52;其次是气温,标准化总影响系数为0.44。对土壤蒸发量影响最大的因子是净辐射,标准化总影响系数为0.50,标准化直接影响系数为0.66;其次是土壤表层含水率,标准化总影响系数为0.49,标准化直接影响系数为0.69。S-W模型是估算干旱区枣园蒸散量的有效工具,基于SEM模型的蒸散特征分析可为干旱区农业节水提供新的思路。
英文摘要	Accurate quantification of evapotranspiration and the analysis of its control factors are of vital importance for agricultural water conservation and ecological-environmental protection. The improved Shuttleworth-Wallace (S-W) model was introduced for simulating evapotranspiration and transpiration in drip-irrigated jujube (Ziziphus jujuba Mill.) orchards in arid areas. The simulations of the S-W model were verified against measured data obtained from the eddy covariance system and measurements of a pin-type stem flowmeter for two consecutive years. The relationships between evapotranspiration in jujube orchards and influencing factors were analyzed by using the structural equation model (SEM). The S-W model showed good performance in simulating evapotranspiration and transpiration in arid areas under parameter value with a_1 of 6.9445, g_0 of 0.043 9, b_2 of 4.604 1, b_3 of 957.110 6, achieving root mean square error (RMSE) of 0.62~0.76 mm/d, regression coefficient (b) of 0.77~0.88, determination coefficient (R~2) of 0.95~0.97, index of agreement (d) of 0.92~0.94, efficiency of simulation (EF) of 0.70~0.81, ratio of RMSE to observations standard deviation (RSR) of 0.44~0.55. The results of SEM indicated that six factors explained 84% and 89% of observed variations in soil evaporation and transpiration, respectively. The coefficient of influence of plant transpiration of soil evaporation was -0.70. Leaf area index had the highest effect on plant transpiration, with total influence coefficient of 0.52, followed by air temperature with total influence coefficient of 0.44 and no indirect influence. Net radiation had the highest effect on soil evapotranspiration, followed by soil surface water content, with total influence coefficients of 0.50 and 0.49 and direct influence coefficients of 0.66 and 0.69, respectively. The results of this model confirmed that the S-W model can be served as an efficient tool for estimating evapotranspiration in jujube orchards in arid areas, whereas SEM may provide a perspective on agricultural water conservation in arid areas.
中文关键词	枣园 ; 干旱区 ; 蒸散量 ; 相关分析 ; 改进Shuttleworth-Wallace模型 ; 结构方程模型
英文关键词	Ziziphus jujuba Mill. orchards arid area evapotranspiration correlation analysis improved Shuttleworth-Wallace model structural equation model
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7027807
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365193
作者单位	乔英, 新疆农业大学水利与土木工程学院;;新疆理工学院建筑工程学院, ;;, 乌鲁木齐;;阿克苏, ;; 830052;;843100.; 马英杰, 新疆农业大学水利与土木工程学院, 乌鲁木齐, 新疆 830052, 中国.; 辛明亮, 新疆农业大学水利与土木工程学院, 乌鲁木齐, 新疆 830052, 中国.
推荐引用方式 GB/T 7714	乔英,马英杰,辛明亮. 基于改进S-W与结构方程模型的干旱区枣园蒸散特征分析[J],2021,52(8):1000-1298.
APA	乔英,马英杰,&辛明亮.(2021).基于改进S-W与结构方程模型的干旱区枣园蒸散特征分析.农业机械学报,52(8),1000-1298.
MLA	乔英,et al."基于改进S-W与结构方程模型的干旱区枣园蒸散特征分析".农业机械学报 52.8(2021):1000-1298.