摘要
为了更加准确地估算淮北平原夏玉米(Zea mays L.)蒸散量,基于安徽省蚌埠市五道沟水文试验站实测的叶面积指数数据,对FAO双作物系数法中的基础作物系数(K_(cb))和土面蒸发系数(K_e)的计算方法进行改进;并以2016、2017两年基于蒸渗仪实测的夏玉米蒸散量对FAO双作物系数法和改进双作物系数法的估算结果的准确性进行评估。结果表明,改进双作物系数法在夏玉米各生长阶段及全生育期的估算结果准确性都高于FAO双作物系数法;改进双作物系数法在夏玉米拔节期至抽雄期的蒸散量计算中改进效果最为明显。说明改进双作物系数法更适用于淮北平原夏玉米蒸散量的估算。
In order to estimate the crop evapotranspiration of summer maize(Zea mays L.) in Huaibei plain more accurately, the calculate methods of the basal crop coefficient(Kcb) and the soil evaporation coefficient(Ke) in FAO dual crop coefficient approach were improved using the leaf area index data, which was measured by summer maize experiment in Wudaogou Hydrology Experimental Station in Bengbu city,Anhui province. Then the accuracy of the estimated results by FAO and improved dual crop coefficient approach was evaluated by comparing the estimated values and the observation values which were obtained by lysimeters. The results showed that the accuracy of the improved dual crop coefficient approach was higher than that of FAO dual crop coefficient approach in all growth stages and the whole growth period of summer maize. The improved dual crop coefficient approach was the most effective in the evapotranspiration calculation of summer maize between jointingstage and tasseling stage. The improved dual crop coefficient approach was more suitable for the estimation of evapotranspiration of summer maize in Huaibei plain.
作者
肖然
朱永华
吕海深
XIAO Ran;ZHU Yong-hua;LYU Hai-shen(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China)
出处
《湖北农业科学》
2019年第9期33-36,共4页
Hubei Agricultural Sciences
基金
国家自然科学基金项目(2016YFA0601504
41571015
41371049)
