玉米籽粒灌浆与积温关系的非线性动态模型

Study on the Nonlinear Model on the Relationship Between the Corn Grain Filling and the Cumulated Temperature

分别用线性与非线性模型建立了描述1989和1990年8至10月份内不同时段积温变化规律的动态模型。在此基础上研究了玉米籽粒灌浆过程的Logistic模型及玉米籽粒灌浆与积温的非线性相关关系，并提出了在研究谷类作物籽粒灌浆与环境因子相关模型时可普遍使用的非线性模型方法。验证结果表明，此方法提高了数据拟合的精度。

In this paper, the change patterns of cumulated temperature between Aug. to Oct. in 1989 and 1990 were established at different time intevals by linear models and nonlinear models, respectively. The Logistic equation model which describes the corn grain filling course was studied accoding to the cumulated temperature model, and another nonlinear relationship model between acumulated temperature and corn grain filling course were also studied. The result from this study showed that the nonliear models could be widely used in the simulation of the grain filling course in cereal crop plants.