云南普洱地区思茅松林生物量及碳储量研究

研究对云南普洱21个思茅松林乔木层、灌木层、草本层、粗死木(CWD)、凋落物进行了调查,建立了思茅松生物量模型,估算了其生物量和碳储量,并分析了其分配特征.结果表明:普洱地区思茅松林活体生物量为82.63～197.89 thm-2(平均129.11 thm-2),其中乔木层生物量占97.86%~98.38%,灌草层为1.62%~2.14%.乔木层生物量的器官分配为茎(67.06%~78.45%)枝(9.75%~16.98%)根(10.14%~13.85%)叶(1.54%~2.10%).死地被层生物量为4.58~8.94 thm-2,其中凋落物占到了81.58%~96.91%,CWD仅占3.09%~18.42%.乔木层生物量和碳储量随年龄增加而增加,分别从12～13 a的101.76 thm-2 和52.06 thm-2增加到25 a的194.68 thm-2 和 97.03 thm-2.当地思茅松林的间伐活动严重影响生物量和碳储量,在间伐强度高的16～19龄的样地中,生物量(82.63 thm-2)甚至低于12～13龄的生物量(103.79 thm-2).

Biomass and carbon storage of Pinus kesiya var. langbianensis in Puer,Yunnan

Based on the investigation of 21 Pinus kesiya var.langbianensis plots in Puer,the biomass and carbon storage in tree layer,shrub layer,herb layer,CWD and litter were estimated by regression analysis and quadrat harvesting method,respectively,and the composition distribution characteristics were analyzed.The results showed that: the living biomass and carbon storage of Pinus kesiya var.langbianensis increased by different stand ages except the forests of 1619 years.The living biomass of Pinus kesiya var.langbianensis forest in Puer was 82.63197.89 thm-2(129.11 thm-2 on average).The biomass of the tree layer contributed to 97.86%98.38%,while shrub and herb only took up 1.62%2.14%.The lbiomass allocation in organs of different tree layers was stem(67.06%78.45%)branch(9.75%16.98%)root(10.14%13.85%)leaf(1.54%2.10%).Dead biomass was 4.588.94 thm-2,in which litter and CWD took up 81.58%96.91% and 3.09%18.42%,respectively.The biomass and carbon storage of the tree layers increased as the forests aged,from 101.76 thm-2 and 52.06 thm-2 in forests of 1213 years to 194.68 thm-2 and 97.03 thm-2 in forests older than 25 years. The high intensity of intermittent lumbering strongly affected the biomass and carbon storage which led to the biomass of 16-19 years old forests (81.15 thm-2) lower than that of the 1213 years.