水稻的Jensen模型中敏感指数累积函数拟合公式的线性化研究

作物阶段耗水量与产量函数模型是缺水条件下进行非充分灌溉决策和灌溉管理的理论基础。作物不同生育期缺水对产量的影响可用作物阶段水分敏感指数来表示。针对过去在敏感指数的研究过程中,对生育阶段的划分过少,而实际应用中又要求生育阶段相对较多的情况,可采用敏感指数累积函数的的方法进行解决,满足了工程的应用需求。但是,由于敏感指数的累计函数在拟合时计算比较麻烦,给公式的应用造成了一定的困难。为了简化计算,提出了线性拟合的计算方法,既能达到计算的精度,又能大大简化计算工作,使敏感指数累积函数的应用更加方便和实用。

Study of Linear Imitation for the Accumulated Function of the Sensitive Index in the Rice's Jensen model

The function model of the crop's stage water consumption and yield is the theory base when we carry out the water-saving irrigation decision and irrigation management.The effect of yield due to deficient water in different stage can be expressed by the sensitive index λ_i.The accumulated function of the sensitive index λ_i was applied to solve the situation of the few growth stages and disunion of the main crop in past research and the more required in practice.The method of traditional imitation for the accumulated function is too comptex,and it made the using of the formula particular difficult.The paper takes the linear calculation method in the accumulated function and it had a high precision and simple count.The result makes the applying of the accumulated function of the sensitive index λ_ihave more practical sense.