For example of the Shiyang River Basin along the Hexi Corrider,in Gansu province,made the imitial research of the major crop water production function and irrigation schedule optimal model,the results are following: 1Based on the related experimental datum gathered,drawing the relationship curve of several major crop yield and evapotranspiration,such as spring wheat,spring wheat-corn strip field,seed melon,sweet melon,cotton and flax and so on. The result shows these there:linearity and non-linear between crop yield and evapotranspiration.

本研究以甘肅省河西走廊石羊河流域為例操操av网，對其主要農(nóng)作物的水分生產(chǎn)函數(shù)及灌溉制度優(yōu)化模型作了初步研究igao.com视频在线，取得了以下成果： 1 根據(jù)收集的有關(guān)試驗資料一级毛在线，繪制了春小麥、春小麥-玉米帶田日韩欧美亚洲中文字幕看、籽瓜色色色。com、白蘭瓜、棉花和亞麻等幾種主要農(nóng)作物產(chǎn)量與耗水量的關(guān)系曲線农村女人一级毛片20岁的毛片，結(jié)果表明老王黄色网站中文字幕，產(chǎn)量與耗水量之間一般存在著線性與非線性的關(guān)系。