Study On The Niche And The Production Of Artificial Korean Pine And Larch Population

The Expand Niche Theory is applied in this paper. Based on the investigation of functional structure of Korean pine forest and Korean Larch forest and their ecological factors, a groping study and analysis had been done on the relationship of their production and niche populationally in Hei Longjiang province. It develops taxonomy of different organization niche and production taxonomy of tree-height grade population niche. On the grads of main niche factors of one and multi dimensions, using the formulates of calculating the population niche of Korean pine and Korean Larch in planted forest as,It calculated the niche breadth of different tree-height grade population by the formula in the dimensions of light, water and nutrient. And discussed the niche breadth laws of all tree-height grade population in the environment grads of one, two and three dimensions. The study discovered the effects of different tree-height grade population on the utilization of environment resources and the adaptability of main ecological factors. The calculation results show that the highest rtee-height grade population of the same aged appeared the resource niche that the soil water content exceeds 25%,soil organic matter content more than 6%.The paper brought forward that it should take into account the environment structure and tree-height grade population contents of planting place when plant Korean pine forest and Korean Larch forest. This study gives scientific theory and instruction to market forest construction of Korean pine and Korean Larch with efficiency, harmony, high quality and low consumption.