气象因子对田面无水层条件下渠灌中稻腾发量的影响研究  

Research on Effect of Meteorological Factors on Evapotranspiration of Semilate Rice under No-water Layer Canal Irrigation

作　　者：赵江辉[1] 李瑞金 

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225009 [2]山东省沂沭河水利管理局,山东临沂276004

出　　处：《节水灌溉》2010年第12期41-43,共3页Water Saving Irrigation

基　　金：江苏省高校自然科学基金项目(06KJD570215)

摘　　要：通过田间试验,研究了在田面无水层条件下渠灌水稻拔节孕穗期、抽穗开花期及乳熟期等3个主要生育阶段腾发量对气象因子的响应及预测模型。相关分析及多元逐步回归分析表明,田间小气候因子中气温、相对湿度及风速对中稻腾发的影响较大。误差分析结果也表明,对气温、相对湿度及风速等逐步回归建立的多元线性模型,最大测量误差分别为5.87%、2.40%和4.56%,拟合效果满意(P<0.01),研究成果为田面无水层条件下中稻需水量的实时预报和节水灌溉制度的制定提供了科学依据。A field experiment was conducted to study effect of meteorological factors on rice evapotranspiration and prediction models of it at three different growth stages（including jointing booting,heading to flowering and milk stage） under no-water layer canal irrigation.Correlation analysis and stepping multi-regression analysis indicated that atmospheric temperature in the field,relative humidity and wind were the three main microclimate factors affecting semilate rice evapotranspiration.Error analysis also showed that the stepping multi-linear regression models of evapotranspiration established based on major meteorological factors at three different growth stages were satisfying（P0.01）,and the maximum relative errors were 5.87%,2.40% and 4.56%,respectively.The research supplied the scientific basis for real-time forecast of semilate rice evapotranspiration and water-saving irrigation program under none-water layer irrigation.

关 键 词：渠灌水稻 无水层 腾发量 小气候条件 

分 类 号：S274.1[农业科学—农业水土工程] S162.42[农业科学—农业工程]