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| 温度、二氧化碳和营养液耦合对甜瓜幼苗生长的效应分析 |
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张冠智1,李洋1,徐鹏1,周顺1,马丽媛1,李艳1,武永军2,杨振超1*
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| (1.西北农林科技大学 园艺学院/农业农村部西北设施园艺工程重点实验室, 陕西 杨凌 712100;2.西北农林科技大学 生命学院, 陕西 杨凌 712100) |
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| 摘要: |
| 为解析环境因子耦合对甜瓜幼苗的影响，实现温室甜瓜环境的精准化管理，以白天空气温度、CO2浓度和营养液浓度为调控因子，采用三因子五水平通用旋转组合设计，引入因子分析法对6个生长指标(总鲜重、总干重、净光合速率、壮苗指数、叶面积和叶绿素含量)提取公因子，将所得公因子作为幼苗综合评价指标。根据评价值拟合甜瓜幼苗综合生长对环境多因素的响应模型，分析环境因素的协同调节作用。结果表明:模型的决定系数(R2)为0.944，均方根误差(RMSE)为0.07，拟合效果较好。在试验范围内，白天空气温度对甜瓜幼苗的影响大于CO2浓度和营养液浓度的影响。甜瓜幼苗综合评价值随CO2浓度和营养液浓度的升高呈先升高后降低趋势，随温度的升高而升高。甜瓜幼苗综合生长的最佳环境因子区间为白天空气温度33 ℃~35 ℃、CO2浓度1 043~1 408 μmol/mol和营养液浓度2.0~2.9 mS/cm。本研究可为甜瓜幼苗环境调控优化提供决策支持。 |
| 关键词: 甜瓜 正交旋转 温室环境 综合评价指标 模型 |
| DOI：10.11841/j.issn.1007-4333.2023.06.12 |
| 投稿时间：2022-10-20 |
| 基金项目:陕西省技术创新引导专项(2021QFY08-02)；2021年陕西省千亿级设施农业专项(K3030821094)；西藏高原设施蔬菜关键技术创新与集成(XZ202202YD0002C) |
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| Analysis of the effect of coupling temperature, carbon dioxide and nutrient solution on the growth of melon seedlings |
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ZHANG Guanzhi1,LI Yang1,XU Peng1,ZHOU Shun1,MA Liyuan1,LI Yan1,WU Yongjun2,YANG Zhenchao1*
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| (1.College of Horticulture/Key Laboratory of Northwest Facility Horticulture Engineering of Ministry ofAgriculture and Rural Affairs, Northwest A&F University, Yangling 712100, China;2.College of Life Sciences, Northwest A&F University, Yangling 712100, China) |
| Abstract: |
| In order to analyze the influence of coupling environmental factors on melon seedlings and realize the precise management of greenhouse melon environment. In the study, the daytime air temperature, carbon dioxide concentration and nutrient solution concentration were used as the regulatory factors, and the universal rotating combination design with three factors and five levels was adopted. The factor analysis method was introduced to extract the common factors of six growth indicators(total fresh weight, total dry weight, net photosynthetic rate, seedling index, leaf area and chlorophyll content), and the obtained common factors were used as the comprehensive evaluation index of seedlings. According to the evaluation value, the response model of integrated growth of melon seedlings to environmental factors was fitted, and the synergistic regulation of environmental factors was analyzed. The results showed that the coefficient of determination(R2)of the model was 0. 944, and the root mean square error(RMSE)was 0. 07, which was a good fit. In the experimental range, the effect of daytime air temperature on melon seedlings was greater than that of CO2 concentration and nutrient solution concentration. The comprehensive evaluation value of melon seedlings increased first and then decreased with the increases of CO2 concentration and nutrient solution concentration, and increased with the increase of temperature. The optimal combination of environmental factors for the comprehensive growth of melon seedlings was daytime air temperature 33 ℃-35 ℃, CO2 concentration 1 043-1 408 μmol/mol and nutrient solution concentration 2. 0-2. 9 mS/cm. This study can provide decision support for the optimization of environmental regulation of melon seedlings. |
| Key words: melon orthogonal rotation greenhouse environment comprehensive evaluation index model |
