Modelling Greenhouse Young Musk Melon Seedling Growth And Studying Its Eco-Physiological Alteration Rule

In order to establish the model of musk melon seedling growth and development driven by temperature and water, 13 tests have been done in greenhouse and in laboratory to simulate young musk melon seedling growth and to study its eco-physiological alteration rule. This study is composed of 6 aspects. They are as the follows:Simulating and modeling young musk melon seedling growth based on development temperature and day as well as on irrigation water maximum. The result shows that the effective accumulated temperatures when musk melon finishes seedling coming out, cotyledon spreading out, shooting 2 and 4 leaves separately, are 22.27℃·d, 83.22℃·d, 110.89℃·d, 130.2℃·d. The effective accumulated temperature needed for the whole young seedling growing phase is 346.8℃·d. The parameter functional formula showing the influence of media relative water content on seedling development is . Effective accumulated temperature parameters at different growing phases, and water water affecting parameter, are worked out. Dynamic developmental and growth model of musk melon is established so that development phases of muck melon seedling can be forecasted systematically. The result from validation of the model shows that the model possesses simulation accuracy, mechanism and practicability.Modeling the plant morphological changing mechanism of young musk melon seedling and studying the relations between morphological change and environment. Linear regression and logistic functional formulae are applied, with factual statistics analysis and according to the theory of accumulated temperature, to work out a musk melon seedling growth model which shows the influence of two factors, effective temperatures and water,on the plant height, stem diameter and main root length of musk melon seedling; and a temperature effect model is also worked out on the length, width and leaf area of cotyledon and leaf. Simultaneously, model parameters and the process of growing morphological change are also analyzed and studied. The results show that plant height and stem diameter are linearly correlated with effective accumulated temperatures; when the functional formula of water content's influence is exponential, the correlated modulus of the model reaches remarkable level. A strong seedling index simulating model is also built with the comprehensive consideration of effective accumulated temperature, photo accumulation and temperature difference accumulation. The result from validation of the model shows the model is precise.