The Dynamic Model of Crop Growth System and Numerical Simulation of Crop Growth Process Under the Multi-Environment External Force Action
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摘要: 依据生物力学的理论与方法,综合探讨了多种环境因子(光照、温度、土壤水分与养分等)外力作用下作物生长的动力学机制.采用连续马尔柯夫过程方法建立了作物生长系统的动力学模型及数值模拟方法,研究了生长速率对外力条件变化的反应与生物量饱和值的变化,并以半干旱区作物为例进行了数值模拟计算与分析,为大田管理提供了定量依据.该动力模型与其它植物生长模型相比,其优越性在于从宏观和微观相结合上反映了资源利用的多维性,揭示了资源转化过程.所建作物生长系统模拟方法,具有先进性和可操作性,实际模拟结果与大田观测结果能很好吻合.Abstract: According to the biomechanic theory and method, the dynamic mechanism of crop growth under the external force action of multi-environment factors (light, temperature, soil and nutrients etc.) was comprehensively explored. Continuous-time Markov(CTM) approach was adopted to build the dynamic model of the crop growth system and the simulated numerical method. The growth rate responses to the variation of the external force and the change of biomass saturation value were studied. The crop grew in the semiarid area was taken as an example to carry out the numerical simulation analysis, therefore the results provide the quantity basis for the field management. Comparing the dynamic model with the other plant growth model, the superiority of the former is that it displays multi-dimension of resource utilization by means of combining macroscopic with microcosmic and reveals the process of resource transition. The simulation method of crop growth system is advanced and manipulated. A real simulation result is well identical with field observational results.
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Key words:
- external force of environment /
- crop growth /
- dynamic model /
- numerical simulation
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[1] Gates D J.Competition between two types of plants located at random on a lattice[J].Math Biosci,1980,48(3):157-194. [2] McMartrie R,Wolf L.A model of competition between trees and grass for radiation,water and nutrients[J].Ann Bot,1983,52(4):449-458. [3] Walker B H,Ludwig D,Holling C S,et al.Stabitity of semi-arid savanna grazing systems[J].J Ecol,1981,69:473-498. [4] 张银萍,张继涛.三种群Lotka-Volterra非周期食饵-捕食系统的持久性[J].应用数学和力学,2000,21(8):792-797. [5] 郭瑞海,袁晓风.一类微生物种群生态数学模型的Hopf分支[J].应用数学和力学,2000,21(7):693-670. [6] Olson R L J,Sharpe P J H,Wu Hsin-I.Whole-plant modelling:A continuous-time Markov(CTM) approach[J].Ecological Modelling1985,(29):171-187. [7] Sharpe P J H,Walker J,Wu Hsin-I.Physiologically based continuous-time Markov approach plant growth modelling in semi-arid woodlands[J].Ecological Modelling,1985,(29):189-213. [8] Harper J L.Population Biology of Plants[M].London/New York:Academic Press,1977,892. -
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