黑龙江省森工林区森林生物量和生产力评估

根据第七次黑龙江省森工林区森林资源清查成果,采用方精云等所建立的森林生物量和生产力估算模型,估算黑龙江省森工林区乔木林生物量和生产力分别为96699.68万t和8436.20万t/年。其中阔叶混交林生物量和生产力最高分别占63.62%和52.3%;按不同起源分龄组乔木林总生物量和总生产力划分,天然乔木林总生物量和总生产力为92718.24万t和7824.46万t/年,其中幼龄林和中龄林占67.2%;人工乔木林总生物量和总生产力为3979.01万t和611.74万t/年,其中幼龄林占30.91%。森工林区平均生物量为83.35t/hm2,低于全国平均水平86.07t/hm2。森工林区森林总生物量和总生产力为103722万t和9334.16万t/年。其中阔叶混交林生物量占森林总生物量59.44%,生产力占森林总生产力47.41%,具有绝对优势。

Assessment of 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 bio mass and productivity of arbor forest in Heilongjiang forest industry region is 966996800 t and 84362000 t/a respec tively.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 orig inal ages,the total biomass and total productivity of natural arbor forest is 927182400t and 78244600 t/a,in which,the young forest and middle aged forest accounts for 67.2%,the total biomass and total productivity of artificial ar bor forest is 39790100 t and 6117400t/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 1037220000 t and 9334160000t/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.