MODELING AND PREDICTION OF DEVELOPMENTAL PROCESS IN RICE .1. STRUCTURE AND METHOD OF PARAMETER-ESTIMATION OF A MODEL FOR SIMULATING DEVELOPMENTAL PROCESS TOWARD HEADING
MODELING AND PREDICTION OF DEVELOPMENTAL PROCESS IN RICE .1. STRUCTURE AND METHOD OF PARAMETER-ESTIMATION OF A MODEL FOR SIMULATING DEVELOPMENTAL PROCESS TOWARD HEADING
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DOI：
10.1626/jcs.59.687
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发表时间：
1990-12-01
影响因子：
--
通讯作者：
NAKAGAWA, H
中科院分区：
文献类型：
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作者：
HORIE, T;NAKAGAWA, H
水稻生育期由一个连续变量DVI来量化，DVI在出苗期定义为0，抽穗期定义为1。DVI值在这两个边界阶段之间的任何时刻都可以通过积分开发速率DVR与时间的关系给出，类似于De Wit等人的方法。(1970)适用。我们提出了水稻日平均温度T和日长L的关系式，其中G是特定品种抽穗所需的最小天数；Th是在给定日长下DVR是最大值的一半的温度；Lc是发育的临界日长；Dvi*是作物对光周期变得敏感的DVI值；A和B是参数。利用单纯形法这一非线性函数的最小二乘回归方法，可以根据水稻物候试验数据集和田间条件下获得的环境数据来估计这些参数的值。模型解释了35种不同条件下生长的日本晴水稻的抽穗期，S.E.=3.6d，而传统的有效度日模型解释相同的数据，S.E.=6.5d。
Rice developmental stage is quantified by a continuous variable termed developmental index, DVI, of which value at the emergence is defined to be 0 and at the heading to be 1,0. The value of DVI at any moment between these two boundary stages can be given by integrating the development rate, DVR, with respect to time, in a similar way as de Wit et al. (1970) applied. We propose an equation for DVR of rice as a function of daily mean temperature T and day length L, where G is a minimum number of days required for heading of a given cultivar; Th is the temperature at which DVR is the half of the maximum under a given day length; Lc is the critical day length for development; DVI* is the value of DVI at which the crop becomes sensitive to photoperiod; A and B are the parameters. By utilizing the Simplex method, a least square regression method for non-linear functions, the values of these parameters can be estimated from experimental data sets on rice phenology and the envionments obtained under field conditions. The model explained heading dates of Nipponbare rice grown under 35 different conditions with S.E. = 3.6 days, while the traditional effective degree day model explained the same data with S.E. = 6.5 days.