马尾松-肉桂人工复层林生物量及生产力研究  

Biomass and Productivity of Strified Mixed Stands of Pinus massoniana and Cinnamomum cassia

作　　者：杨梅[1] 李丽娟[1] 蓝金宣[2] 陈立金[1] 叶绍明[1] 

机构地区：[1]广西大学,南宁530004 [2]广西林业科学研究院,南宁530011

出　　处：《西北植物学报》2013年第3期585-591,共7页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金(31070560);"948"国家林业局引进项目(2005-4-03);广西林业"十一五"科技项目(林科字2006-0009);梧州市科学研究与技术开发计划(201101013)

摘　　要：应用相对生长法和样方收获法研究了广西岑溪市马尾松不同光环境处理下营造的马尾松-肉桂人工复层林的生物量及生产力。结果显示:(1)不同处理中,枯落物层生物量随林分郁闭度的增加而增加,灌木层、草本层生物量则随着林分郁闭度的增加而减少;马尾松-肉桂人工复层林模式下林分的生物量、生产力以及群落总生物量远大于马尾松单层林。(2)不同处理的马尾松-肉桂人工复层林林分净生产量均大于马尾松单层林,且上层林马尾松郁闭度在0.5～0.7条件下与肉桂形成的复层林更有利于提高环境资源的获取能力,其中以马尾松林分郁闭度为0.5、密度781株/hm2以及肉桂密度5 952株/hm2的人工复层林模式的成层性最明显,群落生物量、乔木层生物量、净生产力水平最高,分别达167.64t/hm2、160.549t/hm2、9.146t/(hm2.a),且分别高于马尾松单层林14.9%、18.5%、68.7%,是经济效益和生态效益最理想的复合林模式。研究表明,光环境处理对群落生物量空间分布有显著影响,对林分各器官生物量的分配有较大影响,复层林能提高乔木层生物量在总群落生物量中的分配。人工复层混交林比单层林更有利于提高获取环境资源的能力并增加林分的稳定性。The biomass,productivity of the multi-layer forests for Pinus rnassoniana and Cinnarnomum cas- sia under different light treatments was studied by the methods of sampling plot harvesting method and al- lometric dimension analysis in Cenxi City. The results were as follows. （1）Among different treatments, the biomasses of litter layer increased while the shrub and herb layer decreased with the shade density increas- ing. The stand biomass,productivities and total biomass in multi-layer forests are far more than that in the single-layer pine forest during the management period. （2）The net productions of stand in multi-layer for- ests were more than that in the single-layer pine forest and the stand structure with 0. 540.7 shade density of pine those multi-layer forests was helpful to get light resource. Particularly, the multi layer model with 0.5 shade density in upper layer and 781 trees/hm^2 of pine and 5 952 trees/hm^2 of cinnamon were consid- ered the desired pattern on economic and ecological benefits that showed the distinct stratification with the highest total biomass （167.64 t/hm^2）,biomass of tree layer （160. 549 t/hm^2） and net productivity [9. 146 t/（hm2·a）] were 14.9%, 18.5G and 68.7% higher than that the single-layer pine forest respectively. From the results,adjusting light resource affected on the distribution of total biomass significantly and alsohad major impact on allocation of organ biomass. The multi-layer forest improved the proportion of tree bi omass in the total biomass which illustrated its stronger ability to gain environment resources, consequent ly,to improve forest stability.

关 键 词：人工复层林 生产力 生物量 马尾松 肉桂 

分 类 号：Q948.157[生物学—植物学]