| 摘要: |
| 建立模型分析温室青椒干物质生产及分配对不同灌水量处理的响应。【方法】于2018年10月―2020年4月，在山西省太原市小店区日光温室内进行不同水分处理的青椒栽培试验，设置全生育期充分灌水处理、苗期亏水50%处理、苗期和开花期连续亏水50%和全生育期亏水50% 4种水分处理，采用2018年10月―2019年4月数据，建立了基于耗水量和累积辐热积的干物质生产及分配模型，并利用2019年10月―2020年4月试验数据进行验证。【结果】青椒干物质积累随温室累积辐热积增加而增加，并随不同灌水量处理而产生显著差异；运用温室青椒生产中累积辐热积和不同处理的耗水量，构建得到青椒植株干物质生产及分配模型，各处理青椒地上和地下部分各器官干物质的预测值和实测值较为一致，标准误差（RMSE）为0.79～3.56 g?株-1；不同灌水量处理的青椒生产中，各器官干物质的模拟值和实测值之间有较高的一致性；青椒茎杆干物质积累绝对误差（MAE）为0.95～2.14 g?株-1，叶的干物质积累MAE为1.25～2.95 g?株-1，果实的干物质积累MAE为6.34～19.54 g?株-1，根的干物质积累MAE为0.54～1.10 g?株-1；亏水处理对茎叶果干物质分配的影响大于其对根系干物质分配的影响。【结论】基于累积辐热积的干物质生产与分配特征模型所需参数少且容易获取，可将该模型应用于肥料充分但灌水量不同的北方温室青椒生产及产量预测和管理中。 |
| 关键词: 水分处理；温室；干物质生产；干物质分配；青椒；模型 |
| DOI： |
| 分类号:S625.5 |
| 基金项目:山西省应用基础研究项目(201701D221193) |
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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 |
