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【目的】干物质生产与分配是菊花(Chrysanthemum morifolium Ramat.)外观品质形成的基础。本研究建立一个预测温室标准切花菊各器官干重和植株地上部分鲜重的模型,为温室标准切花菊外观品质的调控提供决策支持。【方法】根据光温对菊花生长的影响,通过不同定植期和不同品种的试验,建立以生理辐热积(Physiological product of thermal effectiveness and PAR,PTEP)为尺度的温室标准切花菊干物质生产和分配模型,并用独立的试验数据对模型进行检验。【结果】模型对温室标准切花菊的植株总干重、叶干重、茎干重、花干重和单株地上部分鲜重的模拟值与实测值的符合度较好,模拟值与实测值间1:1线的决定系数(R2)和回归估计标准误差(RMSE)分别为:0.97、0.97、0.97、0.83、0.99;67.5g·m-2、22.4g·m-2、28.2g·m-2、15.4g·m-2、3.73g/株。本模型对菊花植株干物质生产的预测精度明显高于基于光合作用驱动的生长模型(R2和RMSE分别为0.82和274.68g·m-2)。【结论】本研究建立的模型能较准确地预测温室标准切花菊的干物质生产和各个器官的干重,模型的实用性较强,可以为温室标准切花菊生产中的光温调控提供理论依据和决策支持。
【Objective】 The production and distribution of dry matter are the basis of appearance quality of Chrysanthemum morifolium Ramat. In this study, a model was established to predict the dry weight of organs and the fresh weight of above-ground part of cut chrysanthemum in greenhouse, and to provide decision-making support for the regulation of cut chrysanthemum appearance quality in greenhouse. 【Method】 Based on the effects of light temperature on the growth of chrysanthemum, through the experiments of different colonization periods and different varieties, we established the greenhouse standard cut chrysanthemum dry matter production based on PTEP (Physiological product of thermal effectiveness and PAR) Assign the model and test the model with independent test data. 【Result】 The results showed that the simulated values of total dry weight, dry weight of leaf, dry weight of stems, dry weight of flowers and fresh weight of above-ground parts of cut chrysanthemum in greenhouse were in good agreement with the measured values. The simulated and measured values The determination coefficient (R2) and the standard error of regression estimation (RMSE) of the 1: 1 line were 0.97,0.97,0.97,0.83,0.99, 67.5g · m-2, 22.4g · m-2,28.2g · m -2, 15.4 g-m-2 and 3.73 g / plant. The prediction accuracy of this model on dry matter production of chrysanthemum plants was significantly higher than that based on photosynthesis-driven growth models (R2 and RMSE were 0.82 and 274.68 g · m-2, respectively). 【Conclusion】 The model established in this study can accurately predict the dry matter production and the dry weight of each organ of the standard cut chrysanthemum, the model is more practical and can provide a theoretical basis for the regulation of light and temperature in the production of greenhouse standard cut chrysanthemum And decision support.