环洞庭湖不同类型防护林生物量研究  

Study on biomass of different types for protection forest system area around Dongting Lake

作　　者：罗佳[1] 田育新[1] 杨楠[1] 姚敏[1] 

机构地区：[1]湖南省林业科学院,湖南长沙410004

出　　处：《湖南林业科技》2011年第5期27-29,43,共4页Hunan Forestry Science & Technology

基　　金：湖南省林业厅重点项目(1999-2);国家林业局推广项目([2006]42号)

摘　　要：以环洞庭湖的杨树、马尾松、杉木等3种防护林为研究对象,对其生物量进行研究。结果表明:3种林分中不同树种营养器官生物量所占比例的大小顺序有所差异,各主要造林树种单株生物量均以地上部分占绝对的优势,占全株生物量的87%以上。3种林分中,杉木林分生物量最高,为232 172.5 kg/hm2;马尾松林的生物量最低,为87 420.88 kg/hm2。各种林分中乔木层生物量与林分生物总量的排序相同。杉木林的平均净生产力最高,为16 982.66 kg/(hm2.a),杨树林其次,为13 984.90 kg/(hm2.a);马尾松林最低,为7 060.40 kg/(hm2.a)。这种差异的产生可能是因为树种不同其生长特性不同以及树叶的光合能力不同所造成的。在3种林分中,均以树干的净生产力最大,其次为树枝。The biomass of Three types of protection forest surrounding Dongting Lake were studied with the protection forest of Populus deltoids, Pinus massoniana and Cunninghamia lanceolata. The results showed that the order of the size of the proportion of biomass for organs of different species for Three stands forestation were different. The biomass of tree aboveground was absolute superiority of the main tree, accounting for 87% of total plant biomass. In the three forestation stands, stand biomass of C. /anceo/ata was highest of 232 172. 5 kg/hm2 and biomass of P. massoniana was lowest of 87 420. 88 kg/hm2. The order of biomass of arbor level were as the same as total biomass. The average net productivity of C. /anceo/ata was highest, 16 982. 66 kg/ （hm2 . a）. P. de/to/des was fol- lowed, 13 984. 90 kg/ （hm2 . a）, and P. massoniana was lowest, 7 060. 40 kg/ （hm2 .a）. The cause of the differences might be different growth characteristics of different species and different photosynthetic capacity of leaves. In the three forestation stands, the net productivity of the trunk was highest, the branches was followed.

关 键 词：洞庭湖 防护林 生物量 

分 类 号：S727.2[农业科学—林木遗传育种]