干旱区生态环境知识资源中心(Arid): Shuttleworth - Wallace模型模拟陕北枣林蒸散适用性分析

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	Shuttleworth - Wallace模型模拟陕北枣林蒸散适用性分析
其他题名	Applicability of Shuttleworth - Wallace Model for Evapotranspiration Estimation of Jujube Forests in Loess Hilly-gully Region
	卫新东 1; 刘守阳 2; 陈滇豫 1; 汪有科 1; 汪星 1; 魏新光 1
来源期刊	农业机械学报
ISSN	1000-1298
出版年	2015
卷号	46 期号:3 页码:142-151
中文摘要	在生态脆弱的陕北黄土丘陵区,林地耗水是生态学者长期关注的热点问题,准确测算植物耗水量是环境水分研究的关键。根据陕北山地枣林的立地条件和蒸散过程特点,结合2012年的实测资料,确定了相关模型参数,实现了Shuttleworth-Wallace(SW)和Penman-Monteith(PM)模型对枣林蒸散量的模拟,并利用2013年茎流计监测的蒸腾量和水量平衡原理推求的蒸散量,对这2个模型进行了比较和检验。结果表明:就整个枣树生育期10d尺度蒸散量而言,SW模型模拟精度优于PM模型。此外,2模型精度随枣树生育期变化而变化,且萌芽展叶期精度均最低。SW模型日蒸腾量模拟精度满足要求,但易受到天气状况影响,晴天模型精度优于雨天。SW模型精度在陕北山地枣林里得到验证,是半干旱区山地枣林耗水规律研究的有效工具。
英文摘要	In the Loess Plateau region, where climatic conditions are dry with severe water shortage, agricultural development is limited by water availability. Several studies have shown that due to high water consumption and poor land management, forest trees induce soil dry-up and ecological degradation in Loess Plateau region. Pear jujube (Ziziphus jujuba Mill.) is one of the common tree species cultivated in this region due to its high drought tolerance and considerable economic benefits, but there are limited studies about its water consumptions. Sustainable cultivation of vast jujube plantations could prevent these ecological issues in the fragile ecological environment of Loess Plateau. Evapotranspiration (ET),which is the sum of plant transpiration and soil evaporation, is a continuous process of water loss in the soilplant-atmosphere continuum. An accurate prediction of ET is necessary for developing agricultural management strategies to improve water use efficiency and ensure sustainable agricultural production. Therefore,the aim of this study on the simulation model of jujube ET would be significant. In addition, the single-layer Penman - Monteith (PM) model is the most commonly used and the one recommended by FAO. However, the model is mostly used for dense canopy vegetation types as the big-leaf" assumption cannot sufficiently differentiate between vegtation and bare soil. As a measure of PM model weakness, Shuttleworth and Wallace developed a more complex two-layer interactive model called the Shuttleworth - Wallace (SW) model that allows interaction between canopy and bare-soil flue. The two-layer SW model shows a superior performance over single-layer models. In the Loess Plateau, due to water shortage, jujube forests are usually cultivated sparsely with low canopy cover, so it is necessary to select a suitable ET model for pear jujube forest. Based on the forest stand and climate condition,we parameterized the SW and PM models by using the data measured in 2012 and fulfilled the estimation of pear jujube forest ET in the fragile,semi-arid,hilly Loess Plateau region of Mengcha Village in Shaanxi Province,China. Then the estimated ET by SW and PM models were validated and compared through ET computed by water balance theory, while the estimated transpiration by SW model was examined by observation from thermal dissipation probes (TDP) during 2013. The results showed that over the whole growing season, SW model performed better than PM model in ET estimation. Their accuracy was the poorest in the germination and leaf expansion stage and changed following the growth seasons. The accuracy of SW model in ET estimation met the evaluation criteria but PM model did not. The accuracy of SW model in transpiration estimation met the evaluation criteria,but it was affected by the weather condition, specifically, sunny days were better than rainy days. In the stand of sparsely cultivated jujube forest, the reliability of SW was comprehensively validated. Therefore, SW model could be the promising model applied in ET estimation to grasp the law of water consumption for jujube forest and similar stand in the semi-arid Loess Plateau.
中文关键词	梨枣 ; Shuttleworth-Wallace模型 ; Penman - Monteith模型 ; 蒸散量
英文关键词	Pear jujube Shuttleworth - Wallace model Penman - Monteith model Evapotranspiration
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5383540
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233064
作者单位	1.西北农林科技大学水利与建筑工程学院, 杨凌, 陕西 712100, 中国; 2.法国国家农业科学研究院(INRA)地中海气候与农业水利系统模拟实验室, 阿维尼翁, 84914
推荐引用方式 GB/T 7714	卫新东,刘守阳,陈滇豫,等. Shuttleworth - Wallace模型模拟陕北枣林蒸散适用性分析[J]. 西北农林科技大学,2015,46(3):142-151.
APA	卫新东,刘守阳,陈滇豫,汪有科,汪星,&魏新光.(2015).Shuttleworth - Wallace模型模拟陕北枣林蒸散适用性分析.农业机械学报,46(3),142-151.
MLA	卫新东,et al."Shuttleworth - Wallace模型模拟陕北枣林蒸散适用性分析".农业机械学报 46.3(2015):142-151.