Study On Growth Simulation Model And Visualization Of Barley In Gansu Province

With the development of information technology and digital agriculture, cropgrowth model and morphological structure and visualization simulation research aregetting more and more attention. Up to now virtual agricultural studies about wheat,rice, corn instead of malting barley in Hexi corridor of Gansu province were more notonly at home but also on abroad.Based on the physiological and ecological process inbarley, integrating growth and cultivation experiment of characteristic barley varietiesin Gansu, with GDD as the main line, combined with growth model research ofdifferent barley organs such as leaves and stems, growth rule and developmentprocess of major organs were explored, and then several parameter-based geometricalmodel for organs were constructed through the method of geometrical curve orsurface. Each development organ in different barley varieties was simulated andvirtual growth of barley, integrating OpenGL,was realized on the base of VC++6.0.Modeling morphogenesis construction in barley was test by the common model testmethods at home and abroad---root mean square error (RMSE) and model accuracy(EF), the test results indicated that the models perform quite well in explanation andprediction. The anticipated results would lay a technical foundation on crops forfurther virtual research.Specifically，the main research works in the paper are as follows:(1)The experimental results showed that the organ development in barley was inaccord with logistic model. According to it,the development of leaf, sheath and stemwere simulated.Leaf form, as the most important part,was expressed through thevarieties of leaf width along with leaf length and the leaf form model was improvedthrough analyzing the data in different leaf position of different leaf.Based on theresearch of relationship between stem and sheath,sheath length, stem length and stemthick were simulated.Combined with the experiment data, with GDD as the main line,the growth relationship in each organ was explored and analyzed, in addition, the timemodel for each organ growth in barley was developed in the condition of GDD. At thesame time the different barley variety parameters in Gansu were determined. An parameter-based geometrical model for organ was constructed according to theabove,which was the important basis for individual visualizatio n of barley.(2)With the NURBS Curve, the virtual model of leaf and sheath were established.Replaced of the parameter in morphogenesis model by each coordinate in NURBSCurve, the design of the organs form was fulfilled through the change of coordinate.(3)Based on the barley morphogenesis model and integration of morphogenesismodel and growth model, used the OpenGL in VC++system,the barley virtual growthsystem was fulfilled. The system included input module, interior management moduleand output module. Basic parameter,genotype parameter in barley morphogenesismodel and output parameter in barley growth model were included in input module.As central part, interior management module was used to fulfill barley virtual show.Firstly, geometrical model and virtual growth morphogenesis of each organ in barleywere improved.Afterwards, using the growth relationship in each organ andintegrating each organ according to structure character in barley, the system realizedvirtual growth show of the whole barley. The output of barley virtual growth wasincluded in the output module.The growth model of malting barley in Gansu is of theoretical and practicalsignificance for modeling morphogenesis construction and visualization of barleygrowth.The technical support was offered to the development of virtual agricultureand digital agriculture, information management of malting barley cultivation andprogress of variety improvement technology were promoted.