温室内作物腾发量计算与验证  

Calculation and verification of crop evapotranspiration in greenhouse

作　　者：陈新明[1] 蔡焕杰[1] 李红星[1] 王健[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院

出　　处：《水科学进展》2007年第6期812-815,共4页Advances in Water Science

基　　金：国家自然科学基金资助项目(50479051);西北农林科技大学校长基金(05ZR041)资助项目~~

摘　　要：以彭曼-蒙特斯方程(简称P-M)为基础,根据温室内地表净辐射的规律,推导出了计算温室内地表净辐射公式,同时引进作物冠层高度,对P-M方程中与风速有关的空气动力学项进行修正,导出了适合于计算温室条件下参考作物腾发量的P-M公式(简称P-M-修)。对不同方法的计算值进行了分析比较,并应用试验资料对P-M-修给予了验证。结果表明,P-M-修与实测值较为吻合,累计值平均误差仅为9.1%。The systems of soil-plant-environment can be controlled in greenhouse with the water heating migration mode, which is different from open field. In the paper, the crop canopy degrees are introduced and the air dynamics value is modified in Penman-Monteith（P-M） equation. As a result, a modified P-M equation that can simplify the calculation of the reference crop evapotranspiration in greenhouse is obtained. The equation is analyzed theoretically and verified by the meteorological data. The results show that the daily evapotranspiration varies with the same trend as the climate factors, but the difference is not negligible. Its precision is higher and the result of the experiment is in accordance with the calculation value through the modified P-M equation. The results show a higher precision and with a daily relative deviation of the prediction 9.1% on average.

关 键 词：温室 作物腾发量 计算 验证 彭曼-蒙特斯方程 

分 类 号：S152.7[农业科学—土壤学] S316[农业科学—农业基础科学]