摘要
基于江西中部马尾松天然林不同生长阶段生物量的调查及含碳率的测定,探讨其不同龄组的单株木、乔木层、林下植被层和凋落物层的生物量及碳储量的变化规律。结果表明:随着林龄的增大,乔木层及单株木各器官生物量呈上升趋势,但不同龄组的单株木各器官生物量占单株总生物量的比重有所不同,幼龄林、中龄林为树干>树根>树枝>树叶>树皮,而近熟林、成熟林和过熟林为树干>树枝>树根>树皮>树叶;林下植被层和凋落物层的生物量没有表现出随林龄增大而上升的变化规律。乔木层碳储量随林龄的增大而增加,5个龄组分别为15.58,22.54,28.27,33.87,66.14 t/hm2;林下灌木层、草本层平均碳储量分别为3.18、2.37 t/hm2;凋落物未分解、半分解层平均碳储量分别为0.43、0.37 t/hm2;乔木层、林下植被层和凋落物层碳储量占群落总量的比例分别为80.92%、16.80%和2.28%。
The changing law of the biomass and carbon storage in different stand structures （ single tree ,the tree layer ,the understory vegetation ,litter layer ） of different age groups was probed into based on the investiga-tion of the biomass and the determination of the carbon content rate of natural Pinus massoniana forest in central Jiangxi Province .The results showed that the biomass of each organ of tree layer and single tree was on the rise with the increase of stand age .The biomass of each organ of single tree of different age groups accounted for dif -ferent proportions of the total biomass ,the biomass distributing sequence of different organs in young forest and middle-age forest was：trunk〉root〉branch〉leaf〉bark;in the near-mature forest ,mature forest and overmature forest was：trunk〉branch〉root〉bark〉leaf;the biomass of understory vegetation and litter layer did not show the variation of rising with the increase of stand age .The carbon storage in tree layer rose with the increase of stand age, the carbon storage amounts in the 5 age groups were 15.58 t/hm2 , 22.54 t/hm2 , 28.27 t/hm2 , 33.87 t/hm2 and 66.14 t/hm2 respectively;the average carbon storage amounts in shrub and herb under forestwere 3.18 t/hm2 and 2.37 t/hm2;the average carbon storage amounts of litter in undecomposed layer and half-decomposed layer were 0.43 t/hm2 and 0.37 t/hm2;the distributions of carbon storage in tree layer,understoryvegetation and litter layer were 80.92%,16.80%,and 2.28% respectively.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2014年第1期131-136,共6页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(31160159)
中国科学院战略性先导科技专题(XDA05050205)
关键词
马尾松
天然林
生物量
碳储量
林龄
Pinus massoniana
natural forest
biomass
carbon storage
stand age
