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温室大棚内作物蒸发蒸腾量计算

陈新明1,2;蔡焕杰1;李红星1;王健1;杜文娟2   

  1. 1西北农林科技大学水利与建筑工程学院, 陕西杨凌 712100;
    2塔里木大学农业工程学院, 新疆阿拉尔 843300

  • 收稿日期:2006-01-16 修回日期:2006-11-07 出版日期:2007-02-10 发布日期:2007-02-10

Calculation of crop evapotranspiration in greenhouse

CHEN Xin-ming1,2; CAI Huan-jie1; LI Hong-xing1; WANG Jian1; DU Wen-juan2   

  1. 1College of Water Resources and Architecture Engineering, Northwest A&F University, Yangling
    712100, Shannxi, China;
    2College of Agricultural Engineering, Tarim University, Alar 843300, Xinjiang, China
  • Received:2006-01-16 Revised:2006-11-07 Online:2007-02-10 Published:2007-02-10

摘要: 以彭曼-蒙特斯(Penman-Monteith)方程为基础,引进作物冠层高度,对方程中与风速有关的空气动力学项进行修正,推导出适合于温室大棚计算作物蒸腾量的简单方法.对推导公式进行理论分析,并应用气象资料给予验证计算.结果表明,修正后的Penman-Monteith计算精确度较高,与实测值较为吻合,相对偏差为4.7%~17.1%,平均相对偏差为11.1%.该公式适于在温室大棚中用于作物蒸腾量的计算.

关键词: 城市植被, 生态效益, 遥感, GIS, 城市生态系统分析(UEA)

Abstract: Based on Penman-Monteith equation, a simplified formula for calculating the crop evapo-transpiration in greenhouse was deduced by introducing the parameter of crop canopy height and modifying the item of aerodynamics related to wind velocity. The deductive procedure was analyzed theoretically, and the formula was validated with meteorological data. The results showed that the modified Penman-Monteith equation had a higher precision of prediction, with a relative deviation of 4.7%—17.1% and 11.1% on average, being suitable to calculate the crop evapotranspiration in greenhouse.

Key words: Urban vegetation, Ecological benefits, Remote sensing, GIS, Urban Ecosystem Analysis (UEA)