玉米光合生产与产量形成模拟模型

玉米光合生产动态及产量形成模拟是玉米生长发育模拟的核心内容,也是研制基于模型的玉米精准栽培智能专家系统的基础。为此,根据"物质-能量转化-能量平衡"理论及作物生理生态学和农业气象学的基本原理,以田间试验数据和搜集相关区试资料为基础,借助计算机模拟技术和数学物理方法等手段,首先建立了玉米群体光合生产动态模拟模型,模型考虑了群体叶面积动态、光合作用、呼吸作用、同化物向各器官的分配及干物质积累等主要生理过程。然后以此为基础,研制了玉米产量形成模型。利用江苏省大面积栽培品种掖单13和苏玉9号的田间试验数据和区试资料对产量模型进行验证,结果表明,模型具有较好的模拟精度。表2,参21。

Simulation models of the photosynthetic production and yield formation in maize

Modeling photosynthetic production and yield formation, as the core of simulating maize growth and development, is the foundation of developing corn"precision-farming" intelligence expert system based on the simulation models. For that, the simulation models for maize photosynthetic production dynamic were firstly established based on both the theory of "matter-energy transform-energy balance" and the fundamental principia of crop physiological-ecology and agro-meteorology, by means of computer simulation technology and math-physics method.The models, based on datum from our field experiments and others' maize regional experiments, concerned physiological processes such as population leaf area dynamic, photosynthesis, respiration,assimilate distribution among organs and accumulation of dry matter in maize.Then maize yield formation simulation models were developed based on our established photosynthetic production dynamic simulation models. Verified by the datum from field experiments with varieties Yedan no.13 and Suyu no.9 that were widely cultivated over Jiangsu province of China,these models gave reasonable simulation precision.