The Assessment of the Forest Biomass and Productivity in Heilongjiang Forest Industry Region

According to the results of the Seventh Forest Industry Region inventory of forest resources, adopting the model of estimating the forest biomass and productivity which is established by Fang Jingyun, estimating the biomass and productivity of arbor forest in Heilongjiang Forest Industry Region is 96699.68×104t and 8436.20×104t/a respectively. Among them, the biomass and productivity of broadleaved mixed forest accounts for 63.62% and 52.3% of the total in maximum respectively. Based on the total biomass and total productivity of arbor forest in different original ages, the total biomass and total productivity of natural arbor forest is 92718.24×104t and 7824.46×104t/a, in which, the young forest and middle aged forest accounts for 67.2%, the total biomass and total productivity of artificial arbor forest is 3979.01×104t and 611.74×104t/a, therein, the young forest accounts for 30.91%. The average biomass of Forest Industry Region is 83.35t/hm2, which is lower than the national average level, 86.07t/hm2. The biomass and productivity of forest in Heilongjiang Forest Industry Region is 103722×104t and 9334.16×104t/a respectively. Among them, broadleaved mixed forest accounts for 59.44% of the total biomass, productivity accounts for 47.41% of total forest productivity, with absolute advantage.