水稻生长发育动态监测农业气象模式研究

STUDY ON AGROMETEOROLOGICAL MODELS FOR MONITORING RICE GROWTH/DEVELOPMENT DYNAMICS

本文发展了一个综合考虑光长和温度非线性效应的水稻发育速度模式,并通过变换衍生出水稻生理发育日概念及计算方法,借此考察水稻叶龄、茎蘖消长和叶面积动态变化过程的特点,采用线性/非线性模型、带弱时滞/强时滞效应的Logistic模型,分别建立了水稻叶龄、茎蘖动态和叶面积动态随累积生理发育日增加而变化的农业气象监测模式。最后,以大田实测资料作了应用检验。

In this study a new rice growth/development rate model is developed from theanalysis of nonlinear effect of daylength and temperature on the rice growth and devel-opment process. Thereupon,the concept and estimating method of the physiological de-velopment day(PDD)is introduced. Several agrometeorological models,including linear/nonlinear models, logistic models with weak and/or strong time-lag effects, demon-strating leaf age,stem-tiller and leaf area index dynamics varying with accumulatedPDD values, are constructed,based on the investigation of the changing agronomical fea-tures. Finally,the models mentioned above are all tested with the field data.