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揭示水稻株高在不同旱涝交替胁迫下的生长规律,寻求理想的水稻株高生长模型,可为进一步利用灌溉调控方式协调群体光合效率和抗风倒伏性能以及产量结构提供参考。运用Logistic,Gompertz和von Bertalanffy 3种非线性生长模型,分别对分蘖期旱涝交替胁迫处理(T-LD和T-HD)、拔节期旱涝交替胁迫处理(J-LD和J-HD)以及浅水勤灌的对照处理(CK)的水稻株高数据进行曲线拟合和分析。经分析得出,不同时期的旱涝交替胁迫处理对于株高生长有着显著影响;通过模型评价指标可知,Logistic,Gompertz和von Bertalanffy 3种非线性生长模型对CK,T-LD和T-HD的模拟效果均显著优于J-LD和J-HD处理;Logistic,Gompertz和von Bertalanffy 3种非线性生长模型均可模拟旱涝交替胁迫下粳稻的生长曲线,但Logistic模型拟合优度更高,与实测值更接近。通过对Logistic方程求导,得出株高增长速率随时间的变化方程,可知T-LD和T-HD在生育阶段后期的生长速率显著大于J-LD、J-HD和CK处理,这表明分蘖期旱涝交替胁迫能够引起生育后期株高的补偿生长。与Gompertz和von Bertalanffy模型相比,Logistics模型更适合分蘖期旱涝交替胁迫处理下株高生长规律。
Revealing the growth of rice plant under different altitudes of drought and waterlogging, and seeking ideal plant height growth model for rice, which can provide reference for further utilizing the regulation of irrigation to coordinate the photosynthetic efficiency, windward lodging performance and yield structure. Using Logistic, Gompertz and von Bertalanffy three nonlinear growth models, the effects of drought-waterlogging alternation (T-LD and T-HD), alternate drought-waterlogging (J-LD and J-HD) Rice plant height data from CK (CK) were curve fitted and analyzed. Through the analysis, it is concluded that the alternate treatment of drought and flood in different periods has a significant effect on the growth of plant height. According to the model evaluation index, Logistic, Gompertz and von Bertalanffy three kinds of nonlinear growth models of CK, T-LD and T-HD Logistic, Gompertz and von Bertalanffy all could simulate the growth curve of Japonica rice under alternate drought and flood stress. However, the Logistic model had a higher goodness of fit, Close to the measured value. Through the derivation of Logistic equation, we can get the equation of plant height growth rate with time, we can see that the growth rate of T-LD and T-HD in late growth stage is significantly higher than that of J-LD, J-HD and CK, Alternate droughts and floods can cause compensatory growth of plant height in later growth period. Compared with the Gompertz and von Bertalanffy models, the Logistics model is more suitable for the plant height growth under alternate drought and waterlogging at tillering stage.