作　　者： ; ; ; ; ;

机构地区： 河海大学

出　　处： 《节水灌溉》 2009年第5期1-3,8,共4页

摘　　要： 根据设施栽培蔬菜需水量试验资料,分析了设施栽培春菠菜和冬菠菜在全生育期内的需水规律和累积需水规律;采用FAO-56单作物系数法计算了设施栽培春菠菜和冬菠菜的作物系数,分析了2种作物的作物系数在全生育期内的变化规律;引入Logistic曲线划分的生育阶段对设施栽培作物系数进行了进程修正,引入气象修正因子对其进行了数值修正。结果表明,设施栽培春菠菜与冬菠菜作物需水规律随生长发育表现为先增后减变化规律,作物累积需水量表现出符合Logistic曲线的慢—快—慢的累积规律;作物系数呈与需水规律一致的变化规律;进程、数值双重修正后的作物系数值更加接近实测值。 According to the data of vegetable water requirement experiment under facility cultivation, the water requirement rules and cumulative water requirement rules of spring spinach and winter spinach under facility cultivation are analyzed and their crop coefficients are calculated through single coefficient approach recommended by FAO-56 in this paper. Moreover, the change rules of two kinds of crops in whole growing stage are analyzed, and the crop coefficients are amended in course according to the growth stage from Logistic curve and in value through weather parameters. The results indicate that water requirement of spinach under facility cultivation increases at first and then decreases, while cumulative water requirement shows the rule of slow to fast to slow, which is accorded with the Logistic curve, the change rule of crop coefficient is similar to the water requirement, and the crop coefficient after course and value amended is more coincident with the measured value.

关 键 词： 设施栽培 需水规律 曲线 作物系数

领　　域： [农业科学]