| Comparative study on submodels of tomato transpiration based on the weather data in soloar greenhouse |
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| DOI：10.7606/j.issn.1000-7601.2021.01.24 |
| Key Words: the cold region of the northern China solar greenhouse aerodynamic resistance stomatal resistance tomato transpiration rate model |
| Author Name | Affiliation | | Meteorological Bureau of Jinzhou, Jinzhou, Liaoning 121000, China | Meteorological Bureau of Jinzhou, Jinzhou, Liaoning 121000, China | | College of Agronomy, Shenyang Agricultural University, Shenyang, Liaoning 110866, China | College of Agronomy, Shenyang Agricultural University, Shenyang, Liaoning 110866, China | | Meteorological bureau of Liaoyang, Liayang, Liaoning 111000, China | Meteorological bureau of Liaoyang, Liayang, Liaoning 111000, China | | Meteorological bureau of Huludao, Huludao, Liaoning 125000, China | Meteorological bureau of Huludao, Huludao, Liaoning 125000, China | | Meteorological Bureau of Jinzhou, Jinzhou, Liaoning 121000, China | Meteorological Bureau of Jinzhou, Jinzhou, Liaoning 121000, China |
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| Abstract: |
| 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 253~1 356 s·m-1 and 235~1 260 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. |
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