干旱地区农业研究2017，Vol.35Issue(2)：227-233,262,8.DOI:10.7606/j.issn.1000-7601.2017.02.37
黄土塬区麦田能量平衡特征
Characteristics of energy balance in winter wheat field on the Loess Tableland
摘要
Abstract
In this paper,eddy covariance data from a winter wheat field on the Loess Tableland were used to investigate the temporal variation of energy components,as well as the characteristics of energy partitioning and its main controlling factors.Results showed that the total net radiation (Rn) throughout the year was 2.56 × 103 MJ· m-2· a-1,and the energy balance closure degree was 0.72.In the wintering and grain filling periods,the energy components were dominated by upward sensible heat flux (H),with a maximum value of 7.09 MJ· m-2· d-1 occurring in June.However,in other growing stages and the fallow period,the energy components were dominated by upward latent heat flux (LE),with a maximum value of 10.71 MJ· m-2· d-1 occurring in May.The average of Bowen ratio (β) was 0.57 in growing season and 0.46 in the fallow period.The annual total amount of soil heat flux (G) was-15.26 MJ· m-2· a-1.The daily total amount of soil heat flux (G) reached a maximum value of 1.85 MJ·m-2·d-1 in June,and it was negative from October to the next January,which showed the release of heat from soil.关键词
冬小麦/涡度相关法/能量平衡/潜热通量/感热通量/黄土高原Key words
winter wheat/eddy covariance method/energy balance/latent heat flux/sensible heat flux/Loess Plateau分类
天文与地球科学引用本文复制引用
苑旭,朱元骏,刘文兆,韩晓阳..黄土塬区麦田能量平衡特征[J].干旱地区农业研究,2017,35(2):227-233,262,8.基金项目
国家自然科学基金项目(41571036) （41571036）
公益性行业(气象)科研专项(重大专项)(GYHY201506001) （气象）
