Study On Application Of Central European Coniferous Forest Management Theory And Technology In Pinus Tabulaeformis And Larix Kaempferi On Qinling Mountain

Thinning is a very important method in forest management. Proper and scientific thinning could be benefit to the nutrition distribution of crowns and the under ground water and nutrition absorption. The growth of individual and community will be accelerated after thinning and it has been announced as a useful approach to improving forest productivity. Central European got much experience during the past several decades towards plantation management. This study introduce the research results of"High value coniferous plantation forest cultivation and management"from Lehrstuhl für Waldbau und Forsteinrichtung, take Houzhenzi forestry centre as research location, through plots investigation and stand monitoring, conducted the thinning method in Pinus tabulaeformis and Larix kaempferi forest on different site condition. The result shows:(1) The method of"High value coniferous plantation forest cultivation and management"is a convenient and efficient thinning management. Above ground herbage and bush species diversity increased after thinning. Meanwhile, the height, coverage and the amount of each species increase dramatically. The root system and crown of potential crop tree developing faster compare to controls, and the micro-environment quality inside the forest improved as well. The site condition improved and the growth of forest accelerated after thinning.(2) The height of Pinus tabulaeformis and Larix kaempferi forest increasing rapidly than controls, this indicate that thinning management enhance the height growth.(3) The DBH of Pinus tabulaeformis and Larix kaempferi increased after thinning in each site condition, this indicate that thinning management accelerate the DBH development. The DBH increased higher than the average level in the initial 6-7 years, after which the growth tends to slow.(4)The timber value of Pinus tabulaeformis and Larix kaempferi forest increased in evidence after thinning. Thinning measurement is benefit for the timber production.(5)The consequence of thinning is affected by different site condition. The height of Pinus tabulaeformis and Larix kaempferi in adret plots grew slower than shade plots after thinning. The DBH of Pinus tabulaeformis and Larix kaempferi developed slower in adret...