Biomass and Increment of Pinus elliottii Plantation in High Altitude Area of Northern Fujian

The biomass and increment of Pinus elliottii plantation in high altitude area of northern Fujian were studied using method of stem analysis. The results showed that the biomass order of Pinus elliottii organs was stem branch root leaf fruit,and the distribution of moisture was root stem leaf branch,the average moisture content of single plant was 56. 19%. The total biomass of 33-year-old Pinus elliottii plantation was 396 735kg·hm-2,and its net productivity was 12 022. 27 kg·hm-2·a-1. The height,DBH and the volume of single plant have reached 21m、24. 6cm and 0. 3805m3. There was 3 pinnacle in DBH growth and 4 pinnacle in height growth,the high growth rate and low growth rate of DBH are consistent with the year of height growth. The annual growth curve of height intersected with the average growth curve multiple times and changed drastically,the volume changed relatively and it did not reach the age of quantitative maturity. The total increment models of height,DBH and volume of Pinus elliottii was established through SPSS 13. 0 with high accuracy.