Study On Direction Nurturing Technology Of Pulp And Construction Wood Of Slash Pine

The study combinate with survey and field test and plot survey and location position survey and qualitative analysis and definite quantity analysis. Applied to dynamic programming and regression analysis on control site and selecting of high quality provenance and family and method of preparation of soil and nursery and original density and thinning method and character of making pulp wood and construction wood of planting industry plantation of slash pine. We careful study on all those.It is obvious effect that model of site index of quantilative control site planting plantation of pulp wood and construction wood of slash pine. It also is the condition of sure high speed and yield of plantation of pulp wood and construction wood.The provenance is located in Alabama and Missisibe and Jorgia and Nancar Provice. Those provenance f ited to pulp wood and construction wood. Applied to 6 high quality families of pulp wood of slash pine such as 0-1027" and 2-46" and 11-101" and 0-609" and IV-47" and 0-508". The timber volume can increase 43. 3%. The fiber length can prompt 5. 67%. The gravity can increase 6. 78%. The content of lifno can increase 7. 53%. Applied to 3 high quality families of construction wood of slash pine such as II -101" and 0-187" and 0-464". The timber volume can increase 46.6%. The gravity can increase7.81%. It can improve straight of trees and dimension of digressive.It is obvious effect that applied rooting flour such as ABT on bake seedling of slash pine. The best concentration is 100 ppm. It can prompt 6.25% of survival contrast with blance. Preparation size and reproduction method and both cross action can not effect increasment of young slash pine. But reproduction method has obvious effect increasment of young slash pine contrast with blance. Reproduction is one of method of prompt land ability of fertilizer. The best preparation size is cave of slash pine in hillock such as 50X50X40cm. The reproduction method is line and block.The original density has obvious effect on diameter and height and single tree volume. It also has obvious effect on straight of tree. But it has not effect on gravity and fiber length and midth. The best original density is 1665 to 2505 trees per hectare of pulp wood and construction wood of slash pine. Thinning has not effect on diameter and height and single tree volume. It has not effect on tree straightand timber character such as gravity and fiber length and width. If nurture pulp wood , thinning times is only 1. The thinning intensity is small to middle scale such as 15% to 30%. If nurture construction wood, thinning times is 2 . The first thinning intensity is middle scale such as 20% to 30%. The second thinning intensity is large scale such as 30% to 45%.Study on the variation regularity of fiber morphogenesis and gravity between year by year. Also analysis the character of timber and growth of slash pine. We decide the pulp wood rotation of slash pine is 13 to 15 years. We also decide the construction rotation is 25 years.We conclude the optimal strategy of management density of pulp wood by applied to growth model and dynamic programming model with optimal target. And value per strategy process combined with dynamic economy such as NPV and IRR. We also conclude 4 model of optimal cultivation of pulp wood and construction wood of slash pine.