温度与水分驱动的甜瓜幼苗生长形态模拟模型研究

Temperature and water driven growth shape simulation and model of musk melon seedlings

为了探讨甜瓜幼苗形态变化与环境温度及水分的关系,该文利用分期播种法和灌溉上限法,采用线性回归和logistic函数式,根据积温学原理,建立了甜瓜幼苗株高、茎粗、主根长度,子叶、真叶1、真叶2、真叶3的长度、宽度及叶面积受有效温度与水分双因素驱动的机理模型,同时对模型参数进行了估算,对器官形态变化过程进行了分析。结果表明幼苗株高和茎粗与有效积温成直线相关关系,主根长度及子叶、真叶1、真叶2、真叶3的长度、宽度、面积的温度效应模型为logstic函数式,水分影响参数为指数函数式。通过验证,模型能较为真实、客观的模拟实际植株形态变化。

In order to ascertain the relationships between young musk melon seedling and its environment, a mechanism model driven by two factors, effective temperature and water, was worked out. The model reveals the mechanism of plant height, stem diameter and main root length, the length of cotyledon, and leaf No. 1, 2, and 3, of young musk melon seedling, applying linear regression and logistic functional formulae, employing stage planting and irrigation maximum methods and taking advantage of the theory of accumulated temperature. Simultaneously, model parameters and the process of growing shape change were also analyzed and studied. The results show that plant height and stem diameter are linearly correlated with effective accumulated temperatures, and that the temperature effect model of the main root length and the length, width and area of cotyledon, leaf No. 1, 2, and 3 is logistic, while the water effective parameter is an index function. It is validated that the model is able to simulate real plant shape change truly and objectively.