Research On The Soft-wood Cutting Propagation For Chinese Dwarf Cherry (Cerasus Humilis Bge.)

Chinese dwarf cherry(OrasMs humilis Bge.), a bush fruit, belongs to cherry genus of rose family . It is special fruit tree in China There have elected some good varieties recently years. The propagation of good varieties relate to the large scope production Chinese dwarf cherry inseparably. In order to promote the good varieties propagation and reduce the production costs, cutting propagation is an effective way without doubt. This experiment was carried on during 2003-2004 in Shanxi agriculture university, mainly included the research of rooting influencing factor, the physiological biochemistry target determination during the course of cutting , research of anatomy and its rooting mechanism and so on . The main results were as follows:Among the four rooting influencing factors (rooting accelerator, type of shoot, pieces of stem, germicide),the influence of germicide was biggest on NongdaNo.3,the influence was not obvious on Nongda.No.4, and the influence of rooting accelerator was biggest on Nongda.No.5. And the same cultivar had their factors' best combination to rooting rate. Usually, the best concentration of IAA is 3000mg/l, IBA 1000mg/I, ABT1000mg/l,and Guoguang rooting powder is 3000mg/l.In the physiological biochemistry target determination, the content of soluble sugar ,starch and the content of soluble protein between the shoot and the leaf had difference during the course of cutting .The content of soluble sugar and starch were consumption when the callus and root appeared .During the course of cutting ,the content of tannin in the leaf and stem first fell ,then rose ,finally fell.The paraffin method was used in anatomy research .It could be discovered that the root primordium did not exist in the xylem, bast ,cambium and cerebral cortex of shoot before cutting. Formation of adventitious root primordium cell needed rooting accelerator. Root primordium take place in cambium. According to the root type division the Chinese Dwarf cherry belongs to the inductive type of root primitive body,From above several aspects we can see that the mechanism of soft-wood cutting is : Under the condition of without root primordium ,the root primordium appear from cambium by using rooting accelerator under the condition of well temperature ,humidity ,and light, then the root primordium breaks through the cerebral cortex, finally extends to outside .The content of soluble sugar rose and starch decreased during 3-6days of cutting .The content of soluble sugar and starch decreased but soluble protein rose to provide the base of material for the formation of new cell during 6-9days . During 9-12days the content of soluble sugar and starch of stem rose and provided the source of carbon for the formation of root primordium. After 12day,the content of soluble protein decreased and rooting organ formed .Gradually after 2o days the cutting plantlets can be hardened-off ,at last transplanted until become a new plant.