| Cite this article: | 石小虎,李超.基于辐热积的灌水量处理对日光温室青椒干物质生产与分配影响的模型分析[J].灌溉排水学报,0,():-. |
| SHI Xiaohu,LI Chao.基于辐热积的灌水量处理对日光温室青椒干物质生产与分配影响的模型分析[J].灌溉排水学报,0,():-. |
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| Model Analysis of Effects of Different Irrigation Amount Treatments on Dry Matter Production and Distribution of Green Pepper based on product of thermal effectiveness in Greenhouse |
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SHI Xiaohu1, LI Chao2
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1.College of Water Resources Science and Engineering, Taiyuan University of Technology;2.Beijing Leping social entrepreneur foundation Kexin Farm
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| Abstract: |
| Abstract: With the continuous increase of green pepper planting in solar greenhouse, the demand of water resources is also increasing. It is of great practical significance to accurately predict the biomass accumulation characteristics of green pepper under different irrigation treatments.【Objective】To explore the response of biomass production and dry matter distribution model of green peppers on the different irrigation amount treatment,【Method】implement greenhouse experiment in Xiaodian district, Taiyuan City, Shanxi Province from October 2018 to April 2020, design 4 irrigation treatments including no deficit in whole growth period, deficit of 50 % only in seedling stage, deficit of 50 % both in seedling stage and flowering stage and deficit of 50 % in whole growth period. This paper based on the dynamic dry matter change of each organs of the green pepper plant under the different irrigation treatments from October 2018 to April 2019, established a dry matter production and distribution model by using irrigation amount and PAR (TEP), validate the stimulation condition of dry matter production and distribution by the experimental data in greenhouse from October 2019 to April 2020.【Result】The dry matter accumulation of green pepper increased with the increase of cumulative thermal accumulation in greenhouse, and had significant difference with different irrigation amount. The dry matter production and distribution model of green pepper plant was established by using cumulative radiation deposition in greenhouse production and water consumption of different treatments. The predicted and measured dry matter values of various organs of aboveground and underground parts of green pepper under different treatments were consistent, and the standard error (RMSE) was 0.79～3.56 g per plant. The mean absolute error (MAE) value of stem dry mass was 0.95～2.14 g per plant, MAE value of leaf dry mass was 1.25～2.95 g per plant, and the MAE value of fruit was 6.34～19.54 g per plant, the MAE value of root dry mass was 0.54～1.10 g per plant; the effect of irrigation amount treatment on dry matter distribution of stems, leaves and fruits was greater than that on dry matter distribution of roots.【Conclusion】The constructed model of dry mass production and distribution can be used for the green pepper production and management in the greenhouse when the fertilizer supply was sufficient but the irrigation amount were different and changing. |
| Key words: irrigation treatment; greenhouse; biomass production; dry matter distribution; green pepper; models |
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