Research On Domestication And Drought-resistance Of Rosa Rugosa Thunb

Rosa rugosa Thunb, in which distributes in Hunchun city jingxinarea, is the Grade one protected plant of the Jilin Province. It has thevery big potential value. At the base of Guo Meng Yao's studies, Thisarticle has been done the further research on the biology characteristicabout Reproduction and growth, the difficult problem of seed depthdormancy on Sexual propagation has been broken. We has laid the foundationto plant it largely continue researching on it home. in the preliminaryresearch of drought-resistance, it was compared with the series of rosespecimen, it is the best of all. we confirmed that it can resist droughtin the nature, we also proved that why it could grew well in the droughenvironment. Thus, we perfect, the researchon domestication gradually andwe could regard it as a idioplasm resources in future. Therefor The socialeconomy and the ecology protection has also been provided an importantinformation. Research conclusion as follows:1) It is difficult to germinate of the seeds of Rosa rugosa Thunb isbecause of its comprehensive dormancy include in physiology dormancy andshape dormancy. Under the cold shock about 0—5℃stratification 180 daysthe seeds could be broken dormancy, the best treatment that 200mg/L peni-cillin could promote to break seed dormancy in certain degree After that,but its germination percentage is only 60%.the maturity 87% seeds withstratificat ion the germination percentage could achieve 80% above.2) The seedling of Rosa rugosa Thunb grows well for the environmentbasic request is: we adopted the suitable mix soil(fine sand:turf:crop-land soil:1:1:1) that bulk density of soil is 0.763/cm3, Sowing depth1～2cm; The seedling density is 800 seedlings/m~2 or below;PH 6.5～7.5;Soil moisture content 23%; illumination 18000lx.3) It is very important to prunes Rosa rugosa Thunbs for its growth well. a year seedling should be cut the inferior branches except superiorbranches, that whould do the important preparation for its blossoming innext year. Only 3 strong branches remain is The best way to update theperennial ones.4) The best fertilization meathod of the seedling of Rosa rugosaThunb is: N, 125.0kg/hm2, P205, 225.0kg /hm2, K20: 125.0kg/hm2.5) It was found that the best specimen on rought—resistance is Rosarugosa Thunb through the analysis of physiology index about ten specimen.There are four main indexes affect the rought—resistance of Rosa rugosaThunb remarkably:Sp;Tr;RWC;MDA. rherefore, we would measure these targetsas the identification.