Research On Cultural Technology Of Liriodendron Chinense×L.tulipifera Plantation

In this thesis, we studied on the growth law of L.chinense XL.tulipifera plantation, searched for the key meteorological factors, site factors and management measures which effected the growth of forest stand by investigating the sample areas. The same time, we studied on the key technologies of cultivating seedlings, planting and tending by the specific design of experiments. All above, the target is to get technology system of L.chinense XL.tulipifera plantation. The main conclusions are as follows:After 6 years, the diameter, height and volume of L.chinense XL.tulipifera plantation reached 14.8cm,9.9m and 0.0805m3 respectively, and grow rapidly, so the forest stand is at the stage of vigorous growth.The dominant weather factor was water factor, which effected growth of L.chinense X L.tulipifera forest stand, light factor followed by the least heat factor. Forest stands on plain and shady slope had the most vigorous growth rate. Growth of forest stand increased with the soil depth, soil organic matter, available nitrogen and phosphorus content increased, while the elevation, slope position, slope and soil gravel content decreased.Producer can get large-sized grafting plants using stem graft, and breeding a large number of grafting plants by bud grafting. Bud the greater, the stock cruder, the higher survival rate, growth was more vigorous.1-year seedling show obvious slow-fast-slow rhythm, the growth rate of fast-growing period close to 60%.1-year and 2-year seedlings come out nursery rate was 76.0% and 82.6%. Mulching can promote seedling growth of L.chinense XL.tulipifera and improve come out nursery rate. After shifting, seedlings heel was effective measures to maintain the survival and current growth, and the use of SAP or mud can maintain high survival rate in 2-3 days. Exogenous hormone can promote root growth potential of and young forest growth L.chinense XL.tulipifera seedlings.Comprehensive site preparation can promote stand growth. Seedlings can be planted in both spring and late autumn, and the large-size seedlings and grafting plants grow quickly after planting. Weed control can improve the growth of forest stands, and chemical weed control saving time and working efficiently. Trees did not need be pruned in the first year after planting; light pruning can promote the growth of L.chinense XL.tulipifera in second year. Fertilization and intercropping dwarf shrub crops can promote the growth of young L.chinense XL.tulipifera plantation.