Effects of accumulated temperature on growth curve of Gynostemma pentaphyllum stem and leaf under the conditions of Simulated light under the forest

The effects of accumulated temperature on the growth curve and leaf number growth curve of Gynostemma pentaphyllum were studied. The growth curve of twigs and strands were studied by curve regression analysis. The results showed that the growth of Gynostemma pentaphyllum Leaf growth curve was optimized, and the growth curve of stem and leaf of Gynostemma pentaphyllum was established, and the curve was fitted and analyzed. Three - dimensional model of the effect of accumulated temperature on the stem length and leaf number of Gynostemma pentaphyllum. The results show that the stem length L and the accumulated temperature t of the strands are in the logistic function, the mathematical model was L=-112.69/(1+(t/892.1)3.31)+130.54, the number of gibbere leaf number n is logistic function with the accumulated temperature t, The model was n=-27.86/(1+(t/1159.77)0.26)+30.37, and the growth model could reflect the dynamic growth of Gynostemma pentaphyllum growth. The experimental results provide a theoretical basis for choosing suitable habitat for Gynostemma pentaphyllum under the forest.