摘要
根据FAO(1991)推荐的参考作物需水量(ET0)计算模式(FAO Penman Monteith),并通过作物系数、农林复合系统作物光胁迫系数及风速减弱系数的综合订正,建立太行山低山丘陵区苹果 小麦复合系统小麦潜在蒸散量计算模型,并利用Li 1600稳态气孔仪实测得到小麦蒸腾量,经转换后得出蒸散量对模型进行验证,旨在探索农林复合系统中作物蒸散的计算方法,为进一步开展水分生态特征的研究提供可行性途径。结果表明:小麦拔节 乳熟期间,模拟值与测算值吻合效果较好,二者线性相关系数可达0 9630(n=51),相对误差平均值为9 68%,t=0 075<<t1090 01=2 618。建立的模拟模型具有理想的计算精度,可以用以计算苹果 小麦复合系统小麦日潜在蒸散量。
According to the reference crop potential evapotranspiration model (FAO-Penman-Monteith),which modified by crop coefficient,radiation stress coefficient and wind speed reduced coefficient,the wheat potential evapotranspiration (ET_(pp)) model in an apple-wheat intercropping in the hilly land of Taihang Mountain was developed.This modified model was tested with the experimental data from LI-1600 steady state porometer.The results showed that the estimated value of ET_(pp) had good agreement with the measured and that the linear correlation coefficlent (R^2) between them was 0.963 0(n=51),the average relative error was 9.65%,t=0.075<<t^(110)_(0.01)=6.87).This model could provide useful reference for estimating wheat evapotranspiration in apple-wheat intercropping.
出处
《林业科学研究》
CSCD
北大核心
2004年第3期284-290,共7页
Forest Research
基金
国家自然科学基金资助项目(39770624)
"九五"国家科技攻关专题(96 007 04 05)部分研究内容
