Evapotranspiration Characteristics of Apple Forest in Hilly-Gully Region of the Loess Plateau

被引：0
|
作者：
Li Q. [1 ,2 ,3 ]
Mu Y. [1 ]
Wang Y. [2 ]
机构：
[1] College of Landscape Architecture and Arts, Northwest A&F University, Yangling
[2] College of Resources and Environment, Northwest A&F University, Yangling
[3] Environmental Monitor Station in Kaifeng, Kaifeng
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2019年 / 44卷 / 08期
关键词：
Evapotranspiration characteristics; Hydrogeololgy; TDP; The hilly appleforest; Transpiration rate;
D O I：
10.3799/dqkx.2018.941
中图分类号：
学科分类号：
摘要：
In this paper, Mizhi County, a typical example of hill-gully region in the Loess Plateau, was selected as the study area to analyze the water balance and evapotranspiration characteristics of apple forestland. The purpose was to understand correctly and evaluate the eco-hydrological effect of apple forest. A thermal dissipation probe (TDP) and micro-lysimeter were used to measure various components of evapotranspiration such as plant transpiration and soil evaporation, and canopy interception was calculated by water balance formula. This study analyzed the relationship between meteorological factors and transpiration rate, evaluated condition of the evapotranspiration of 7-years apple forest. The results show that the average daily transpiration rate in the different growth periods ranked in the order of fruit growth period>fruit coloring stage>new shoots growth and young fruit growth period>germination and flowering period. The time of peak which the transpiration rate reached at different growth stages was different at the hour scale. Under the different weather conditions, the main meteorological factors affecting the transpiration rate of apple forest were solar radiation and air temperature, and the transpiration in sunny days were significantly larger than that of the rainy days. The main periods of water consumption of apple trees were fruit growth period and fruit coloring period. Precipitation shows significant lagging effect on transpiration. The contribution of plant transpiration, soil evaporation and canopy interception to evapotranspiration in the apple forestland ranked in the order of 58.9%>26.8%>14.3%, respectively. During the experiment period, the precipitation was more than the evapotranspiration, and the water of apple forest was surplus. The water management of apple forest should be strengthened in germination and flowering period, new shoots growth and young fruit growth periods. © 2019, Editorial Department of Earth Science. All right reserved.
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页码：2818 / 2828
页数：10
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