铁力木人工林生物量与碳储量及其分配特征

在样方调查和实测生物量的基础上,采用相对生长法对28年生铁力木人工林碳储量及其分配特征进行了研究。结果表明:铁力木各器官碳含量在452.4~524.5 g/kg之间,大小排序为:树叶树干树枝树根树皮;土壤碳含量以表土层最高,且随土层深度增加而降低;铁力木人工林乔木层生物量和碳储量分别为165.8和79.3 t/hm2, 分配顺序均为树干树枝树根树叶树皮;铁力木人工林生态系统生物量与碳储量分别为173.5和203.1 t/hm2,生物量的分配主要集中在乔木层(95.6%), 碳储量的分配顺序为土壤层(59.3%)乔木层(39.0%)地被层(1.7%);林下植被碳含量为地上部分地下部分,而生物量和碳储量的分配均为地上部分地下部分。 

Biomass,carbon stock and allocation characteristics in Mesua ferrea plantation

Based on the quadrat survey and actual biomass measurement in a 28-year-old Mesua ferrea plantation in Experimental Center of Tropical Forestry located at Pingxiang City of Guangxi Zhuang Autonomous Region, the carbon stock and its allocation characteristics were studied by the allometric method. The results showed that carbon contents in different organs of M. ferrea ranged between 452. 4 and 524. 5 g/kg, following the order of leaf >stem >branch >root >bark. Soil carbon content in the surface layer was the highest, and it reduced with the increase of soil depth. The biomass and carbon stock of tree layer in M. ferrea plantation were 165. 8 and 79. 3 t/hm2 , and the allocation of biomass ranked as stem>branch>root>leaf>bark, the same as the allocation of the carbon stock in the tree layer. The biomass of M. ferrea plantation ecosystem was 173. 5 t/hm2 and carbon stock 203. 1 t/hm2 , the biomass in the plantation was mainly distributed in the tree layer ( 95. 6%) , and the allocation of carbon stock in different components was soil layer ( 59. 3%) > tree layer ( 39. 0%) > ground layer (1. 7%) . The carbon content aboveground was greater than that underground in shrub layer and herb layer;however, the biomass and carbon stock aboveground were less than those underground.