漂浮育苗温室水分蒸发特性初步研究.PDF

中国农学通报 2015,31(17):262-266 Chinese Agricultural Science Bulletin 漂浮育苗温室水分蒸发特性初步研究 曾超尘，向 阳，曹 凡，吴明亮 （湖南农业大学工学院，长沙410128 ） 摘 要：为指导漂浮育苗温室精确除湿，通过对营养池中营养液的蒸发、培养基质的水分蒸发、作物的蒸 腾作用等温室大棚水分蒸发的主要来源，在特征环境下的各种参数的适宜性进行了分析描述，构建了漂 浮育苗条件下温室大棚水分蒸发模型，并人工模拟晴天和阴天的恒定光照实验验证了水汽蒸发速率的模 2 型。结果表明：模型预测值与实际观测值之间的回归估计标准误差＜0.02 kg/(m ·h) ，相对误差＜8.9% ， 2 决定系数R 在0.92~0.94 之间。模型关于在漂浮育苗条件下温室大棚水分蒸发的参数选取和模型的准 确预测性较好，对除湿有一定的指导意义。 关键词：漂浮育苗温室；水分蒸发；预测模型 中图分类号：S625.5 文献标志码：A 论文编号：cas PreliminaryStudyonCharacteristicsofWaterEvaporationofFloatingSeedlingGreenhouse ZengChaochen,XiangYang,CaoFan,WuMingliang (CollegeofEngineering，HunanAgriculturalUniversity,Changsha410128) Abstract: Forguidingprecisedehumidificationinfloatingseedlinggreenhouse,basedonPenmanformula, thispapertooktheevaporationofthenutrientsolution,theevaporationofthemediummoistureandthecrop transpirationasmainrecoursesofevaporation.Theauthoranalyzedanddescribedthesuitabilityofvarious parametersinparticularenvironment,establishedthemodelofevaporationinfloatingseedlinggreenhouse. Theexperimentsunderartificiallightingconditionofsunnyandcloudydayshowedthatthevalueofmodel predict was in good agreement to the observed value. The regression estimation standard error was 2 2 ＜0.02 kg/(m ·h),therelativeerrorwas ＜8.9%andthecoefficientofdeterminationR wasbetween 0.92- 0.94.Theaccuracyofparameterselectionofwaterevaporationmodelofgreenhouseandthepredictionof modelwerebothgood,andcouldbeaverygoodguidefordehumidification. Keywords:floatingseedlinggreenhouse;wa