摘要
利用平流—干旱修正模型计算了太行山低山丘陵区苹果—小麦复合系统中麦田蒸散量 (ETesti) ,并利用Li- 1 6 0 0稳态气孔仪实测得到小麦蒸腾量 ,经转换后得出的麦田蒸散量 (ETexpe)对模型进行验证。结果表明 :ETesti与ETexpe吻合效果较好 ,二者线性相关系数可达 0 .980 9(n =1 1 2 ) ,相对误差平均值为 1 0 .2 5 % ,且平流—干旱模型所需输入的气象因子相对较少 。
The experimental field is located in the 'Experimental Area for the Comprehensive Study on the Agroforestry Systems in the hilly regions of the Taihang Mountain' (31°11′N, 112°03′E) in Pei Village, Jiyuan City, Henan Province, and the total area of the agroforestry systems is 160 hm 2. The field is 200 m in length from east to west and 36 m in width, and it is 0.72 hm 2 in area. The soil texture is sandy light soil, the soil thickness is 80 cm, and the field can be irrigated. The evapotranspiration (ET) from winter wheat field within an apple wheat intercropping in the hilly land of the Taihang Mountain is estimated by an advection aridity modified model. The model is tested with the experimental data measured by LI 1600 steady state porometers. The results show that ETesti has a good agreement with ETexpe, the linear correlation coefficient between them is as high as 0.980 9 (n=112), and the average relative error is 10.25%. The advection aridity model can provide the useful reference for estimating the field evapotranspiration in the agroforestry systems.
出处
《干旱区研究》
CSCD
2004年第2期134-138,共5页
Arid Zone Research
基金
国家自然科学基金项目 ( 3 9770 62 4)
关键词
平流-干旱模型
农林复合系统
农田
蒸发
太行山
丘陵区
advection aridity model
agroforestry system
field evapotranspiration
the Taihang Mountain.
