Sprouting Regeneration Of Chinese Fir

Sprout regeneration used the characteristics of strong sprouting of sprouting trees, grow into Sprout and develop into the plant relying on the dormant buds or adventitious buds of stumps, biological basis of which from germination of the domiant buds.Chinese fir recommended as the important timbey tree species in China, also as one of the conifer trees with stronger sprouting capability.For a long time, Chinese fir seedling plantations mainly based reforestation, which not only had the high cost, but will also caused soil erosion and other adverse consequences, at the same time, forest management objectives, had also changed into focused on unification of economic, ecological and environmental effectiveness, instead of the mode of high input, high output, low effectiveness in the past.Sprout regeneration not only budded low cost,but also can avoided many disadvantages,such as the various defects, in such circumstances, Sprout regeneration favoured by the people again.Especially in recent years, people pay more attention to the dwarf forest operations of short-rotation, Chinese fir sprout regeneration as a vitality and ancient field of study, the scholars aroused great concern again. This paper mainly studied the technologies of sprout regeneration of Chinese fir and maintaining soil fertility, The results of the experiments are following:1. Diameter of Chinese fir stumps had a little impact on the sprout number,the sprout height and the sprout diameter.2. the sprout number,the sprout height and the sprout diameter increased with the increasing of the heights of stump.3. PVP had a great impact on the sprout number,the sprout height and the sprout diameter. they increased with the increasing of the concentration of PVP, the sprout number,the sprout height and the sprout diameter reached a significant level compared with the control plots.When 6 months old, compared with the control plots treatments had reached significantly level, the concentration of 12 g/L and 8 g/L PVP solution on the sprout number,the sprout height and the sprout diameter in basal were not significant; When 12 months old, PVP concentration of 8 g/L and 2 g/L of the influence on the sprout height was significantly, PVP concentration of 8 g/L and2 g/L of the sprout height the impact of the difference was not significant.The mathematical model of PVP concentration with the sprout number,the sprout height and the sprout diameter was builded, the mathematical model results showed that there were significant correlation between PVP concentration and the sprout number, between PVP concentration and the sprout height, between PVP concentration and the sprout number. PVP concentration and the sprout number, PVP concentration and the sprout height, PVP concentration and the sprout diameter were positively correlated.The results of EP analysis and MPP showed that PVP concentration increased one percent, the sprout number,the sprout height and the sprout diameter increased the corresponding percentage. PVP concentration increased of one unit, the sprout number,the sprout height and the sprout diameter increased of the basal value.4.Schima litter had greater impact on the sprout number,the sprout height and the sprout diameter of Chinese fir. With Schima increased in the amount of litter, the sproutting indexes also gradually increased. When 6 months old, Schima litter of 2 kg / strains, the number of sprouts was higher than control plots by 53.57 percent; the height of sprouts was higher than control plots by 31.02 percent; the diameter of sprouts was higher than control plots by 25.88 percent. When 12months old, Schima litter of 2 kg / strains,the height of sprouts was higher than control plots by 30.41 percent, stumps the diameter of sprouts was higher than control plots by 42.98 percent.5. Studied on the effect of different hormones on sproutting indexes of Chinese fir using orthogonal experimental design, The results showed that the best combination were 6-BA, IBA 100 mg/L, GA₃ 50mg/L for the number of sprouts of Chinese fir.When 6 months old, GA₃, IBA 50 mg/L, NAA200 mg/L had the best effect for the height of sprouts of Chinese fir; GA₃,IBA 50 mg/L, NAA 200 mg/L had the best effect for the diameter of sprouts of Chinese fir. When 12 months old, 6-BA, IBA 100mg/L, GA₃ 50 mg/L had the best effect for the height of sprouts;6-BA 100 mg/L, IBA 50 mg/L and NAA 400 mg/L had the best effect for the diameter of sprouts.6.Studied on the effect of different fertilization on sproutting indexes of Chinese fir using orthogonal experimental design, The results showed that the most important affecting on the sprout number,the sprout height and the sprout diameter was P fertilizer treatment, next was N fertilizer treatment, the lest one was K fertilizer, P fertilizer, N fertilizer 100 g/strain , K fertilizer 50 g/strains had the best effect for the sprout number,the sprout height and the sprout diameterof Chinese fir.7.The cost in the sprout regeneration of Chinese fir were lower than the seedling regeneration white the investment in the sprout regeneration is only 1/2.4 as much as that in the seedling regeneration for the 3-year-young plantation.