摘要
北方寒区日光温室冬季生产基本无通风,为了探寻温室内不同边界层空气动力学阻力(ra)与气孔平均阻力(rc)表达式计算植株蒸腾量的差别及适用于此环境下的最优子模型模拟式,以Penman-Monteith(P-M)方程为基础,比较分析了4组适用于北方寒区冬季日光温室(基本无通风条件)的ra、rc子模型模拟的温室内番茄植株蒸腾量。结果表明:子模型的变化具有波动性,采用不同子模型模拟的蒸腾量值差异较大,北方寒区冬季日光温室植株蒸腾作用主要集中于白天,此时不同子模型模拟的ra、rc平均变化量分别为5.73%、37.10%;本试验环境下,温室仅在中午前后通风,其余时间处于密闭状态,此时,室内风速垂直流通且并不均匀,选用包含空气温度、植株叶片温度及植株生理指标(叶片特征长度、单株植株叶面积指数LAI)等参数模拟单株植株边界层空气动力学阻力值,选用的r a模拟式在晴天、阴天平均变化范围分别为185~489、249~357 s·m^-1,模型检验结果为:Pearson=0.826,MRE=21.69%,MAE=0.02,RMSE=18.59,EF=0.81;应用反演式模拟单株植株气孔平均阻力的准确率较高,选用的r c反演式在晴天、阴天平均变化范围分别为253~1356、235~1260 s·m^-1,模型检验结果为:Pearson=0.955,MRE=7.16%,MAE=0.01,RMSE=8.56,EF=0.95。
Crop production in solar greenhouse in the cold region of the northern China is usually performed under the environment of little ventilation,To explore the difference of transpiration on disparate aerodynamic resistance(ra)and average stomatal resistance(rc)as well as optimal submodel simulation for this environment,in this study,a tomato(Lycopersicon esculentum Mill)transpiration model based on the Penman-Monteith(P-M)equation,four groups ra,rc were used to estimate the transpiration rate of a tomato scales and comparative analysis by experiments.The results showed that the variation of submodels should be fluctuating,different transpiration values were obtained by different submodel calculation and the transpiration values were different.Transpiration of CSGs plants in winter was mainly concentrated in daytime in northern cold region,thus,mean change of ra and rc was 5.73%and 37.10%.The solar greenhouse only around noon ventilated indoor wind speed and vertical circulation was not uniform,thus we chose air temperature,plant leaf temperature,and plant physiological indexes(leaf characteristic length,individual plant LAI)to simulate the aerodynamic resistance.The mean variation range of submodel ra by selected was 185~489 s·m^-1,249~357 s·m^-1 in sunny and cloudy days.The model test results were:Pearson=0.826,MRE=21.69%,MAE=0.02,RMSE=18.59,EF=0.81 and the inversion formula with high accuracy to calculate stomatal resistance.The mean variation range of submodel rc selected was 253~1356 s·m^-1 and 235~1260 s·m^-1 in sunny and cloudy days,respectively.The model test results were:Pearson=0.955,MRE=7.16%,MAE=0.01,RMSE=8.56,and EF=0.95.The results of this experiment can provide reference for the selection of sub-models for calculating plant transpiration in practical production.
作者
王淼
罗新兰
尹佳琪
苏慧
常姝婷
WANG Miao;LUO Xinlan;YIN Jiaqi;SU Hui;CHANG Shuting(Meteorological Bureau of Jinzhou,Jinzhou,Liaoning 121000,China;College of Agronomy,Shenyang Agricultural University,Shenyang,Liaoning 110866,China;Meteorological bureau of Liaoyang,Liayang,Liaoning 111000,China;Meteorological bureau of Huludao,Huludao,Liaoning 125000,China)
出处
《干旱地区农业研究》
CSCD
北大核心
2021年第1期182-190,共9页
Agricultural Research in the Arid Areas
基金
国家重点研发计划课题(2019YFD1002204)。
关键词
北方寒区
日光温室
空气动力学阻力
气孔平均阻力
番茄
蒸腾速率
模型
the cold region of the northern China
solar greenhouse
aerodynamic resistance
stomatal resistance
tomato
transpiration rate
model
