机构地区: 云南大学生命科学学院生态学与地植物研究所
出 处: 《云南大学学报(自然科学版)》 1994年第3期220-224,共5页
摘 要: 本文研究了滇西北高山松林的生物量。林龄大生物量减小。林龄约40年和100年的林分,生物量分别为294.306t/hm ̄2和231.495t/hm ̄2;在各器官中,树干生物量(143.532t/hm ̄2和102.120t/hm ̄2)最大,占群落总生物量的48.90%和44.24%;乔木一层(亦即高山松)的生物量254.283t/hm ̄2和171.408t/hm ̄2,占群落总生物量的86.41%和74.04%;与林龄约40年的林分相比较,林龄约100年的高山松林中,高山松生物量所占比例减小而黄背栎等树种的生物量增大。 Thebiomass of Pinus densata forests which locate in NorthwestYunnan Province China with 28°05′N and 99°4o′E,and an elevation 3340~3500mis studied with the dimension analysis method.The total biomass of 40-aged stand is294.306 t / hm ̄2and that of 100-aged stand is 231;495 t / hm ̄2.Of the total biomass,thefirst tree layers which are only composedof Pinus densata share 86.41 % and 74.04%,the second tree layers which are mainly composed of Quercus ponnosa, Rhododendron,and Lyonioa share 13.32% and 25. 67% ,and the shrub layers, herbaceous layer andIitter shares respictively 0.04% and 0.05 % ,0.0 1 % and 0.02% 10.22%. The tree layerbiomass allocates differently to organs,i,e,48.90% and 44. 24% to stem wood,9.10% and 7.76% to stem bark, 19.10% and l9.60% to branches,4.99% and 5.85% toneedles(leaves),8.01 % and 6.82%to root neck,and 9. 80%and 15.81 % to root svs-tem。The importance of Pinus densata to the total biomass of stands reduces and that ofQuercus ponnosa raises as the age of stands increases.