The Effect Of Plant Growth Regulator On The Growth Of Chinese Mahogany (Toona Sinensis Roem)

To spray gibberellins(50,100,150mg/L) upon Chinese Mahogany, can accelerate terminal bud to sprout ahead of schedule for three days.100mg/L gibberellins can accelerate terminal bud to grow rapidly, remarkably increasing single plant yield, and make the harvest ahead of time. 6-BA(25,50,75 mg/L) can promote lateral branch to sprout in great quantities and restrain the apical dominance, 6-BA50mg/L would get the best effect, which can make about 7.5 lateral branches sprout. 6-BA75mg/L can accelerate terminal bud to sprout in advance, grow rapidly, increase diameter, and increase the yield single plant. Gibberellins and 6-BA could also speed up the ratoon to appear and improve the ratoon yield remarkably, 6-BA50-75mg/L would get the best effect.Gibberellins and 6-BA can improve Chinese Mahogany bud's yield and the water content, getting tender, reducing crude fat, crude protein and crude fiber content remarkably, 100 mg/L,150mg/L gibberellins and 6-BA75mg/L would get the best effect. To spray 6-BA75mg/L upon Chinese Mahogany bud, the crude protein content of each 100g fresh weight was 5.08g less than CK. The crude fat content was reduced byl.l3g. To spray gibberellins 100mg/L upon Chinese Mahogany bud, the crude protein content of each 100g fresh weight was reduced by 3.08g than CK, the crude fat content reduced by 0.95g. Comparing with other vegetable crops, the crude protein content of Chinese Mahogany bud fresh weight was the same as pulse crops, but crude protein content was higher than other vegetable crops.To soak Chinese Mahogany's semi-lignification branch in aqua of ABT (25,50,100mg/L), IBA(25,50,100mg/L) and NAA acid for about 12 hours, ABT₃50 mg/L and IBA50mg/L) would get the best effect, the percentage of success was 20% and 17%. To soak seed in aqua of gibberellins(50,100,150mg/L), 6-BA(25,50,75 mg/L) and ABT3(50,100,150mg/L), gibberellins50mg/L would get the best effect, the percentage of seed germination was the highest. Then the second was 6-BA25mg/L and ABT3100mg/L. But 6-BA75 mg/L and ABT3l50mg/L inhibited the seeds' rudiment. The most suitable consistency of Offspring growing were gibberellins50mg/L, 6-BA25 mg/L and ABT350-100mg/L.When seedlings got three or four euphyllum, the seedlings were sprayed different consistency gibberellins and 6-BA. When sprayed gibberellins, the cane could get long rapidly, the leaves would get yellow, the leaf area would get small, the quantity of fallen compound leaf was larger, the plant became slender and long, the network of roots was poor, the axial root was long, the axillary's root was little. 6-BA can accelerate the offspring network and the aerial growth. The 6-BA75mg/L would get the best effect. It can accelerate the grow, that the leaves were big and black green. The compound leaves were more than the leaves, the stalk of a plant was strong. The network was abundant, the dry mater content was high.