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为了寻找适合浑善达克沙地参照作物腾发量计算的简易方法,该文以实测的微气象数据为基础,分别采用FAO56 Penman-Monteith(1998)、Hargreaves-Samani(1985)、Irmark-Allen拟合以及Priestley-Tay-lor(1972)计算参照作物腾发量,并以普适性强、精度高的FAO56 Penman-Monteith为基准,对其他方法进行气象因子的非线性修正。结果表明:气象因子修正后的参照作物腾发量精度大大提高,为获得相对可靠的参照作物腾发量开辟了新的途径。FAO56 Penman-Monteith、Irmark-Allen拟合和Priestley-Taylor都需要用到净辐射,而专业测量净辐射的设备在农业气象站里很少安装,使三种方法推广使用受到一定限制。气象因子修正后Hargreaves-Samani需要的气象数据相对容易获得,且计算简单,具有较高的精度,建议在缺少气象资料的干旱地区推广采用。
In order to find an easy way to calculate the reference crop evapotranspiration in Hunshandake Sandy Land, based on the measured micro-meteorological data, we use the FAO56 Penman-Monteith (1998), Hargreaves-Samani (1985), Irmark-Allen Fitting and Priestley-Tay-lor (1972) calculated the reference crop evapotranspiration and non-linear correction of other meteorological factors based on the universal and high-precision FAO56 Penman-Monteith. The results showed that the precision of reference crop evapotranspiration after meteorological factor amendment was greatly improved, which opened up a new way for obtaining relatively reliable reference crop evapotranspiration. Net radiation is required for both the FAO56 Penman-Monteith, Irmark-Allen fit, and Priestley-Taylor, while equipment specializing in measuring net radiation is seldom installed in agrometeorological stations, limiting the use of the three methods. The meteorological data needed by Hargreaves-Samani after the meteorological factor correction are relatively easy to obtain, and the calculation is simple and has high precision. Therefore, it is suggested to be popularized in arid areas without meteorological data.