Epsilon Archive for Student Projects

Abstract

Chinas government has a multifunctional program for a more sustainable forestry since 2000. This six key forest programs goal is to develop a more sustainable forest sector but also take environment consideration. The state forest administration in China has decided to create 5.8 million hectare of fast growing and high yield forest. Eucalyptus has showed to have good properties for pulp and timber production and therefore Eucalyptus plantations are under development in costal areas in southern China. By adding extra nutrients, growth can be enhanced in Eucalyptus plantations. The purpose of this fertilization trial is to see the possible effects on growth in different fertilization treatments. This thesis is a part of a series of experiment conducted on the site the past years. The whole trial will be summarized the coming years. Treatment NPK 300-B had after 44 month the highest CAI of 47 m3 ha-1, year-1. The lowest CAI had treatment NK-90 with 30 m3 ha-1, year-1.Highest standing volume has treatment NPK- 300-B (131 m3 ha-1) followed by NPK-150-B (126 m3 ha-1). Four treatments are very close to each other and range between 110-119 m3 ha-1. The treatment with the lowest volume was NK-90 (96 m3 ha-1) followed by control treatment (101 m3 ha-1). Despite extra phosphorus the trial has not reach the target ratio for this nutrient and because of this the trail has potential for higher growth. No visual effect was visible on the root system between broadcast and string applied fertilizer.

Fires impact on wood quality has also been investigated in this study. The aim is also to evaluate the economic impact a fire can have in a stand. Fire damaged trees from three damage classes were dissected in three ways; as Chips, planks and discs to evaluate quality. The quality problems that were found were charcoal remains. These were located 3-4 m up in trees and seem to be randomly spread among the trees. Presence of gum were also found but it seems not to be a problem in the pulp process. The study indicates that it is hard to avoid charcoal in timber by judging only the surface and the size of the fire scars to estimate quality.

Best revenue has veneer in treatment NPK-150 B 58965 RMB/ ha-1 followed by NPK- 100 but in pulp and chipboard alternative best revenue were found in treatment NPK-100. Pulp had 40431 RMB/ ha-1 and chipboard had 5425 RMB/ ha-1