摘要
基于浑善达克沙地2005-2006两个不同水文年对羊草、拂子茅、冰草构成的羊草群落生育期中气象因子及生理因子野外观测试验数据,用联合国粮农组织FAO-56分册中介绍的方法计算了羊草群落生育期基本作物系数和土壤蒸发系数,并对基本作物系数进行了地区气象因素和牧草单叶气孔阻力校正。用校正后的作物系数模拟计算的蒸腾、蒸发量与实际观测值间进行了拟合相关图、拟合优度参数法的有效性检验。结果表明:计算的蒸发、蒸腾量与实测结果基本接近。考虑水分胁迫时,有条件的地区应该对作物系数进行地区气象因素和单叶气孔阻力校正。
Based on the field experiment data of climate and physiological factors in the growth period of the Community of Leymus Chinensis from 2005 to 2006 to simulate the basic crop coefficient（Kcb）,and one for soil evaporation（Ke） of the Community of Leymus Chinensis in the Otindag sandy area in two different hydrological years presented in the FAO irrigation and drainage paper 56（FAO56,1998,crop evapotranspiration,guidelines for computing crop water requirements）,and adjust them by climate and leaf resistance.The daily evapotranspiration is simulated with the basic crop coefficient adjusted.The simulation results are assessed by the approach of consisting in presenting a graphical representation of model simulation transpiration and evaporation compared with observed values and by the regression between observed and model simulated values close to the origin The results show that the transpiration and evaporation values calculated by adjusted dual crop coefficient approach are close to that as estimated from experiment data.The basic crop coefficient on the Penman Method need to be updated by climate and leaf resistance under water stress conditions if there are on-the-spot experiment data available.
出处
《中国农村水利水电》
北大核心
2010年第4期39-42,共4页
China Rural Water and Hydropower
基金
国家自然基金地区项目(50769005
50319040)
高等学校博士学科点专项科研基金(20060129004)
关键词
水分胁迫
浑善达克沙地
羊草群落
双作物系数法
蒸发蒸腾量
water stress
the otindag sandy area
the community of leymus chinensis
dual crop coefficient approach
evapotranspiration
