Study On Energy Exchange Of Dry-Land Spring Maize Field In Loess Plateau

文献类型： 外文期刊

第一作者： Guo, Jiaxuan

作者： Guo, Jiaxuan;Mei, Xurong;Li, Yuzhong

作者机构：

关键词： Dry-land spring maize;Bowen ratio;evaporation ratio;eddy correlation method

期刊名称：ADVANCES IN ENVIRONMENTAL TECHNOLOGIES, PTS 1-6

ISSN： 1022-6680

年卷期： 2013 年 726-731 卷

页码：

收录情况： SCI

摘要： Dry-land spring maize is a main cultivated crop in North-West China. To explore the mechanism for changes of evapotranspiration and heat consumption in dry-land spring maize, eddy covariance technique was used to monitor the energy-exchange characteristics of the crop in "Eastern Loess Plateau" field. The results showed that the field-energy-balance ratio of dry-land spring maize is in the 0.75 - 1.0 range during non-rainfall daily noon (12:00 - 14:00). The Bowen ratio exhibited "L-type" trend during the total growth stages, namely, the highest Bowen ratio was at seedling stage with phase average 4.85 +/- 1.42. The evaporation fraction showed a single peak trend in August, and the higher evaporation ratio met with more precipitation with average values 0.55 +/- 0.06. The Bowen ratio and average evaporation fraction at the entire growth period were 1.78 +/- 1.71 and 0.40 +/- 0.18, respectively. About 40% of surface energy obtained from drought agro-ecosystem was used for evapotranspiration and heat consumption.

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