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华北地区冬季温室植物冠层温度建

, PP. 169-172

Keywords: 温室,冠层温度,机理模型,神经网络

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Abstract:

基于温室内植物冠层能量平衡关系,建立了与温室内、外气象条件和温室结构相关的冠层温度模拟机理模型,并在华北地区文洛型温室内对该模型进行了试验验证。结果表明:模型能较好地模拟冬季温室内植物冠层温度,模拟值和实测值之间的相关系数为0.7975,均方根误差为1.3℃。建立了冠层温度的BP神经网络模型,模型相关系数为0.7835,均方根误差为0.6℃。在所建神经网络模型基础上,运用敏感性分析法对影响冠层温度的各因素进行重要性分析和排序,得出影响冠层温度的最重要因子是室内温度,其次为蒸腾速率、室外太阳辐射和室内相对湿度。

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