The Research On The Propagation Techniques And Rooting Mechanism Of Stem Cuttings Of Choerospondias Axillaris

Choerospondias axillaris is well-know multiple functioning tree species that is native to China, Also it is a fine speedy-growth and high-yield, which can use as ecolomic or timber forest because it has high medicine and edible value and favourable material quality. Choerospondias axillaris is one of the national strategic reserves timber tree species. In order to deal with keep the quality of good cuttings varieties, cutting propagation technology were evaluated with hormones, mess concentration of hormones, hormones treatment time, medium composition, positions of cutting collection. In order to stock and provide the technological basis for effective cultivation and utilization of Choerospondias axillaris, we studied the cutting propagation techniques and the rooting mechanism of cutting in physiology. The result were documented.(1)Four factors were studied with orthogonal experimental design method, for example, hormones, mass of concentration of hormones, hormone treatment time, cutting medium. In order to improve cutting rooting rate and quality of cutting seedlings in Choerospondias axillaris. The result showed that the main factors was the mass of concentration of hormones which affected cutting rooting rate in Choerospondias axillaris, and the main factor was the mass of concentration of hormones and hormones treatment time which affected root number, and the main factor as the mass of concentration of hormones and hormones which affected root length. The results of comprehensive analysis showed that the best cutting seedling treatments in Choerospondias axillaris method was 400mg/L KIBA or IBA for 0.5h or 1h, and inserted the cutting medium of peat and perlite at the ratio of 2:1.(2)The effects of different treatments on green-wood rooting were studied by completely random designs. The result showed:In different concentrations of hormones and hormones, it was the best to treated by 600mg/L for 1 hour, rooting rate reached to 75.56%, average of rotting number was 10.33, average of root length was 7.13cm.The best result of rooting rate by mass of concentration of NAA and IBA, 400mg/L NAA was 66.43%, and 600mg/L IBA was 66.89%.(3)In different cutting medium for rotting rate, the best cutting medium is peat and perlite at the ratio of 2:1.(4)The effects of different lignification cuttings treated by 600mg/L KIBA on rooting rate. The result showed:the low lignification cutting(The diameter of 0.2cm-0.4cm)resulted the highest rooting rate of 81.1%,71.11% of the middle lignification cutting (The diameter of 0.7-0.9cm)and only 51.11% of the high lignification (The diameter of 1.3-1.5cm).(5)The determination results of enzyme activity of phloem by hormones. All the hormones, have the same influence, showed a single peak "up-down".For example, different state of 400mg/LKIBA and 600mg/L KIBA, show the same activity on SOD enzyme,7d for the top and be lower after that, and CK is 21d for the top and be lower after that, synchronizing with the time of self-healing and adventitious rooting. POD in the whole show "up and down" the overall trend, the treatment group and KIBA600mg/L KIBA400mg/L relative to other groups of peaks and troughs appeared early, indicating that a certain concentration of exogenous hormone treatment can increase the activity of POD. Hormone treatments of cuttings resulted increased enzyme activities, and led to promote rooting of cutting.(6)During the rooting process, soluble sugar and starch content present was the "down-up". Soluble sugar and starch was the main factor in process of cutting rooting, their content in the plant will get a drastic falling during the rooting which to prove the energies for Choerospondias axillaris rooting.