南亚热带红椎马尾松纯林及其混交林生物量和生产力分配格局  

Allocation Pattern of Biomass and Productivity for Three Plantations of Castanopsis hystrix,Pinus massoniana and Their Mixture in South Subtropical Area of Guangxi,China

作　　者：覃林[1] 何友均[2] 李智勇[2] 邵梅香[1] 梁星云[1] 谭玲[1] 

机构地区：[1]广西大学林学院,南宁530004 [2]中国林业科学研究院林业科技信息研究所,北京100091

出　　处：《林业科学》2011年第12期17-21,共5页Scientia Silvae Sinicae

基　　金：林业公益性行业科研专项(200904005)

摘　　要：研究中国林业科学研究院热带林业实验中心28年生红椎纯林、马尾松纯林以及红椎-马尾松混交林的生物量和生产力分配格局。结果表明:红椎纯林、马尾松纯林与红椎-马尾松混交林生物量分别为94.797,212.435和155.638t.hm^-2;3种林分的乔木层生物量均占林分生物量的95%以上,其他各层均表现为凋落物层(0.56%～3.26%)>草本层(0.24%～0.85%)>灌木层(0.25%～0.37%);在3种林分的乔木层各组分中,干材生物量最大,占总生物量的49.31%～62.25%,红椎纯林中其他组分表现为根(17.16%)>枝(11.76%)>干皮(6.84%)>叶(1.99%),而马尾松纯林与红椎-马尾松混交林则为枝(18.39%～19.98%)>根(14.48%～17.72%)>叶(5.55%～8.80%)>干皮(4.19%～5.57%);3个林分的净生产力表现为红椎纯林(3.369t.hm^-2a^-1)<红椎-马尾松混交林(5.628t.hm^-2a^-1)<马尾松纯林(7.781t.hm^-2a^-1)。The three 27-years old plantations,mixed stand of Pinus massoniana and Castanopsis hystrix（MCP）,pure stand of Pinus massoniana stand（PPS） and pure stand of Castanopsis hystrix stand（PCS）,were investigated in the Experimental Centre of Tropical Forestry,Chinese Academy of Forestry which located in Pingxiang County of Guangxi.By harvesting and measuring the average diameter of trees collected from the above three stands,we established a group of allometric growth equations to estimate their allocation patterns of biomass and net productivity.The results showed that the total biomass for PCS,MCP and PPS were 94.797,212.435 and 155.638 t·hm-2,respectively,and the tree layer accounted for more than 95% of the total biomass.The biomass of other layers was in the order as：litters（0.56%~3.26%） herbs（0.24%~0.85%） shrubs（0.25%~0.37%）.For the biomass of tree layer in the three stands,allocation to stems was the greatest,ranged from 49.31% to 62.25%,followed by roots（17.16%）,branches（11.76%）,bark（6.84%）,and then leaves（1.99%）,for PCS;but for PPS and MCP,the order was branches（18.39%~19.98%）roots（14.48%~17.72%） leaves（5.55%~8.80%）barks（4.19%~5.57%）.The net productivity in the studied plantations was in the following order：PCS（3.369 t·hm-2a-1）MCP（5.628 t·hm-2a-1）PPS（7.781 t·hm-2a-1）.

关 键 词：红椎人工林 马尾松人工林 混交林 生物量 生产力 

分 类 号：S718.155[农业科学—林学]