Study On Technology Of Rapid Propagation And Micrografting Of Korla Fragrant Pear And Its Rootstock In XinJiang

This thesis is based on three kinds of pear species(korla fragrant pear ,S?F series dwarfing rootstock of pear , Berchleaf pear )to be experimental material, The key influential factors of the three kinds of material to proliferate?rooting?transplant and factors of survival of micrografting seedling were brought up,through the studies on regeneration and technology of micrografting , At the same time, some improving methods were put forward, technical system of rapid propagation and micrografting of these material were established. The main results are as follows: The succeed rate of establishing explant are higher when adopting dormant caudexes segment to be material of rapid propagation of pear species. In this experiment, multiplication rate and growth of shoots of korla fragrant pear are optimum on medium: AS + BA1.0mg/ l+ the IBA0.1mg/ l+ GA30.7mg/l. Through analysis and observe on experimental data and growing potential of tube shoot, the mean multiple rate of delicate shoot goes upping with increasing concentration of BA. At the same time, rate of variation and abnormal seedling is also gradually increasing. However, certainly concentration of the IBA matching with BA would increase valid quantity of seedling, which can be easily transferred. GA3 matching with BA and IBA could obviously improve the biology index of delicate shoot. Berchleaf pear and dwarfing rootstock of pear all could induce to take root. AC could obviously promote rooting of pear species. PG has no 5function to promote rooting of pear. Fixed amount vermiculite in medium can clearly increase the quality of root. Control with the environmental situation is the key technique to increase survival rate of tube seedling which have transplanted to outside. Among three way of grafting, cleft grafting show the best result, its difficulty to graft is lowest, and the survival rate is highest. When subjoining IBA0.5mg/L into medium, the survival rate of seedling will be enhanced. Cion and rootstock age of grafting Seedling is important to its survival.