Studies On Simulation Model Of Above-Ground Organ Morphology Of Flue-Cured Tobacco

Tobacco is one of the important economic crops in china. Its area and total yield ranking first in the world. Its structure is relatively simple.Analysis of the structure indicates that tobacco is composed by many of architectural units.At the same time, the internode, the segmentl and on attached organ (for example leaf) composes the architectural unit.As a result, The growth of tobacco also be interpreted as the growth of architectural unit during the formation and growth.In this paper, based on the information of 2006 and 2007 years of test data and extensive collection of relevant information, according to plant structure and function of the feedback mechanisms, to the growth cycle GC for the time step, the structural unit of the architectural unit, a growth of tobacco Physiological ecology and morphology of the simulation model is made. The model is divided into development modules, the production of the assimilation module, the distribution of assimilation and accumulation of modules, Construction of organ morphology models and so on several sub-modules.Based on the linear correlation relations of the increased structural unit's number and the accumulated temperature change in the tobacco growth process,the growth module carries on the forecast of the tobacco birth advancement.Based on the tobacco upside a net increase of assimilation products increase and the growth cycle change relations, the assimilation production module carries on the assimilation of the estimate products.The use of a particular moment of the tobacco plant above-ground biomass and total weight to calculate the proportion of the allocation for the department of the ground, using the proportion of various organs of the ground and the total weight to calculate upside various organs assignment index, and simulated various organs of the dynamic changes of the tobacco dry weight at the foundation of the assigned index and the biomass. The models have constructed the dynamic relations of upside, green leaf, stem, assignment index and growth cycle for the first time. Thus it had demonstrated precisely along with various organs assignment index continuously change rule of the tobacco growth process and enhanced the model of rational explanation and the mechanismBased on 2006 test and analysis of meteorological data obtained the value for the development parameters DR is 75.76(℃·d).Morphology construction parameter including leaf and internode shape parameter respectively. Based on the principle of organ morphology and 2006 test data obtained parameters of leaf morphologyξb is 0.045 g/ cm2,the value of k i and r are 11.328 and 0.4153 respectively. The internode shape coefficient appears two peak values along with the location of knots rise.βrises along with the internode position rise. In order to confirm the model, Comparison with the test data of 12th GC and 20th GC and the simulated result carry on the separately,the tentative data is as a whole consistent with the analogue result.Through continuous observation of content of tobacco leaf chlorophyll , Comprehensive analysis of the tobacco leaf chlorophyll content with the reproductive process of change and its relationship with the RGB,and Construct the simulation model of tobacco leaf color changes based on the chlorophyll content of . Chlorophyll content of tobacco leaves with the reproductive process of change in early growth period and growth of the early maturity and growth in line with the laws of the Second Curve. Chlorophyll content essentially unchanged in the second phase of leaf color changes. The leaf chlorophyll content and leaf position are linear relationship at this stage.Using segment function to describes the leaf chlorophyll content with the growth cycle process of dynamic change process. And use of linear equations quantitative description of the leaf pigment content and the quantitative relationship RGB. The correlation coefficient of simulated value and measured all above in 0.763 .Application of internationally commonly used method of tested model, to test the simulated result of tobacco morphology, the results show that, Simulation of tobacco to form a better performance parameters of the growth and development of tobacco,and has a good agreement with the measured data. All of these note the use of this model to simulate the growth of the tobacco process to be effective.