干旱区生态环境知识资源中心(Arid): 基于双作物系数的旱作玉米田蒸散估算与验证

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	基于双作物系数的旱作玉米田蒸散估算与验证
其他题名	Estimating Rainfed Maize Evapotranspiration Using the FAO Dual Crop Coefficient Method on the Loess Plateau
	冯禹 1; 龚道枝 1; 王罕博 1; 郝卫平 1; 梅旭荣 1; 崔宁博 2
来源期刊	中国农业气象
ISSN	1000-6362
出版年	2017
卷号	38 期号:3 页码:141-149
中文摘要	农田蒸散(ET)准确估算与区分对理解土壤-植物-大气连续系统水分传输动力学过程和调控机制具有重要意义。本研究基于FAO-56 Penman-Monteith(PM)模型计算参考作物蒸散量(ET_0),运用双作物系数法计算黄土高原东部地区旱作玉米田2011-2012年蒸散(ET_(FAO)),以同期涡度相关系统实测值(ET_(EC))作为标准值对双作物系数法计算结果进行评价,并将玉米田ET区分为土壤蒸发和作物蒸腾。结果表明:2011年春玉米生长季ET_0、ET_(EC)和ET_(FAO)分别为628、400.3和492.7mm,双作物系数法RMSE、AAE和R~2分别为0.864mm·d~(-1)、0.678mm·d~(-1)和0.755,且R~2达极显著水平(P<0.01);2012年三者分别为553、372.6和441.4mm, RMSE、AAE和R~2分别为0.676mm·d~(-1)、0.693mm·d~(-1)和0.781,R~2亦达极显著水平(P<0.01),说明双作物系数法在该地区模拟旱作春玉米ET有较高的精度。基于双作物系数法对ET进行区分表明,2011年全生育期土壤蒸发和作物蒸腾分别占ET的36.4%和63.6%;2012年分别占ET的31.7%和68.3%,说明旱作春玉米田ET主要来自春玉米蒸腾。
英文摘要	Evapotranspiration (ET) is the only term which appears in both land surface energy balance equation and water balance equation, accurate estimation of ET is challenging but of impotance for assessing biomass production, allocation of water resources, and improving crop water ues efficiency in rainfed agricultural ecosystem. This paper invested the applicability of FAO dual crop coefficient approach in estimating ET and its components (plant transpiration and soil evaporation) of rainfed maize in semi-arid region of the Loess Plateau. Continuous measurements of ET with eddy covariance system in 2011 and 2012 were used to validate the performances of FAO dual crop coefficient approach. The results indicated that reference evapotranspiration were 628mm in 2011 and 553mm in 2012. The FAO dual crop coefficient approach was acceptable in estimating ET compared to eddy covariance measurements, with RMSE, AAE and R~2 of 0.864mm·d~(-1), 0.678mm·d~(-1) and 0.755 (P<0.01) in 2011, 0.676mm·d~(-1), 0.693mm·d~(-1) and 0.781 (P<0.01) in 2012, and the measured and estimated ET values were 400.3 and 492.7mm in 2011, 372.6 and 441.4mm in 2012, which confirmed the good performances of FAO dual crop coefficient for estimating ET. Soil evaporation and maize transpiration accounted for 36.4% and 63.6% of total ET in 2011, 31.7% and 68.3% in 2012, respectively, indicating that maize transpiration was the main component of ET.
中文关键词	玉米 ; 双作物系数法 ; 蒸散 ; 涡度相关系统
英文关键词	Maize Dual crop coefficient approach Evapotranspiration Eddy covariance system
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5952080
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237052
作者单位	1.中国农业科学院农业环境与可持续发展研究所, 作物高效用水与抗灾减损国家工程实验室;;农业部旱作节水农业重点实验室, 北京 100081, 中国; 2.四川大学/水利水电学院, 水力学与山区河流开发保护国家重点实验室, 成都, 四川 610065, 中国
推荐引用方式 GB/T 7714	冯禹,龚道枝,王罕博,等. 基于双作物系数的旱作玉米田蒸散估算与验证[J],2017,38(3):141-149.
APA	冯禹,龚道枝,王罕博,郝卫平,梅旭荣,&崔宁博.(2017).基于双作物系数的旱作玉米田蒸散估算与验证.中国农业气象,38(3),141-149.
MLA	冯禹,et al."基于双作物系数的旱作玉米田蒸散估算与验证".中国农业气象 38.3(2017):141-149.