Artificially Propagated China Ivy Growth And Aging Under The Conditions Of Effective Accumulated Temperature

The hedera nepalensis var. sinensis growing in open field of Kunming were used as the experimental materials. The character of planting and the pattern of branching were summed up according to surveying the habitat, measuring the growth and senescence situation of Hedera nepalensis var. sinensis. At the same time, it used SPSS11.5 for setting up the regressive equations, and then the curves were drawn on the basis of them by Microsoft Office Excel 2003. The life period of hedera nepalensis var. sinensis's leaf and stem were summed up on the basis of the regressive equations and the curves. Afterwards the patterns of the planting to field and the horticultural management were promoted. The results are as follows:During the growth and senescence period of the hedera nepalensis var. sinensis's leaf, measuring the leaf length, leaf width, single leaf area and effective accumulation temperature, the growth and senescence regressive equation were set up, and then the curves were drawn on the basis of them. The results indicated that the leaf length which grows first achieves maximum value earlier than the leaf width, but the maximum value of the leaf length is less than the leaf width. The senescence rate to the effective accumulation temperature is"J"curve, and the speed of the leaf senescence appears lampshade-single peak curve along with the effective accumulation temperature.Effective accumulation temperature was selected as drive variable. After measuring, observing, analyzing the development and formation of hedera nepalensis var. sinensis'stem. The results indicated that the effective accumulation temperature was 2718.34℃·d when the main stem of hedera nepalensis var. sinensis finished the growth. The elongation length of main stem to the effective accumulation temperature is"S"curve, and the elongation speed of the main stem appears lampshade-single peak curve along with the effective accumulation temperature.After analyzing and studying the changes of matter accumulation, allocation in the whole growth period. Mathematical model of main stem matter accumulation, matter accumulation in stem and leaf are established using a method of curve imitating. After imitating, not only the main stem matter accumulation, but also the matter accumulation of stem and leaf all take on"S"curve. After mathematical analyzing, the dynamics of matter accumulation rate for main stem matter and matter allocation in stem and leaf all take on"single peak"curve.The hedera nepalensis var. sinensis was used the triangle planting to field during the rest period of the hedera nepalensis var. sinensis, and the best planting density is 510 mm×510 mm in the ideal growing situation. The management of hedera nepalensis var. sinensis should give first place to pruning. The pruning stage divides into winter pruning and summer pruning. The pruning methods include shorting, thinning, cut back and pruning shoot. Adjustable technique includes training and traction. The purning branches and removing leaves organize into the training of hedera nepalensis var. sinensis. The training can control quality, appearance and the incidence of diseases. Traction can mold the shape of plant which will be fit for the around environment and strengthen the adhesion power.