التفاصيل البيبلوغرافية
| العنوان: |
供氮质量浓度对水培生菜营养液消耗影响模拟研究. (Chinese) |
| Alternate Title: |
Simulation Water Consumption of Hydroponic-cultured Lettuce: The Effects of Nitrogen Concentration. (English) |
| المؤلفون: |
王利春, 郭文忠, 李友丽, 宁松瑞, 李银坤, 魏晓明 |
| المصدر: |
Journal of Irrigation & Drainage; Nov2021, Vol. 40 Issue 11, p37-43, 7p |
| Abstract (English): |
[Objective] The objective of this paper is to investigate the influence of nitrogen concentration in nutrient solution on physiological traits of lettuce grown in hydroponic culture. [Method] The experiment was conducted in a greenhouse, with the Flandria cultivar used as the model plant. We compared five nitrogen concentrations: 12.25, 24.5, 49, 98 and 196 mg/L, each having two replicates. In the experiment, we measured the leaf area index (LAI), accumulated water consumption and the change in meteorologic factors in the greenhouse, from which we derived the relationship between water consumption of the crop and nitrogen concentrations in the solution. [Result] The accumulated water consumption and LAI both increased first followed by a decline as the nitrogen concentration increased. The relationships between LAI and the nitrogen concentration can be fitted to a quadratic function, and comparison with measured data showed fitting of the model was accurate. The model describing the change in water consumption with nitrogen concentrations also agreed well with experimental data. [Conclusion] Accumulative water consumption and LAI of the hydroponic-cultured lettuce both increased with nitrogen concentration in the nutrient solution, and the models describing their relationships agreed well with experimental data. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
【目的】探明供氮质量浓度对封闭式水培生菜营养液消耗量的影响规律, 构建考虑供氮质量浓度及气象信息 的水培生菜营养液消耗量模型。【方法】以"富兰德里"奶油生菜为供试作物, 设置5 个营养液供氮质量浓度（12.25、 24.5、49、98、196 mg/L）处理, 开展了2 茬水培试验, 测定了温室内气象信息、生菜的叶面积指数（LAI）和营养 液累积消耗量。【结果】水培生菜的营养液累积消耗量和LAI 均随着供氮质量浓度的增加呈先增大后减小的趋势, 生 菜LAI 与营养液供氮质量浓度呈二次曲线关系, 建立了考虑营养液供氮质量浓度影响的生菜LAI 变化模型。模型验 证结果表明, 营养液不同供氮质量浓度处理的生菜LAI 模拟值与实测值吻合较好。在此基础上, 进一步构建了考虑 营养液供氮质量浓度及气象信息的水培生菜营养液消耗量模型。【结论】利用构建的营养液消耗量模型对不同供氮质 量浓度处理的水培生菜营养液消耗量进行模拟, 模拟值与实测值吻合较好. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |