摘要
对四川川中丘陵地区 2 0世纪 80年代中叶引种造林的墨西哥柏人工林分生物量和生产力进行了测定和研究。按“径阶平均标准木法”和“样方收获法”分别调查了乔木层、草本植物层和枯枝落叶层的生物量。据调查数据 ,用“相对生长法则”建立了乔木层单株立木各器官生物量干重的回归方程 ,方程的精度均在 98.5 %以上。同时还研究了林分平均净生产量和产量结构。结果表明 :川中丘陵区 11年生墨西哥柏林分生物量平均为 77.75 6t/hm2 ,净生产量为 892 8.73kg/hm2 ·a。其中 ,乔木层生物量为 75 .710t/hm2 ,占林分总量的 97.37% ;净生产量为 6 882 .73kg/hm2 ·a ,占林分净生产量的 77.0 9%。林分中草本的生物量和净生产量分别为 1.0 5 0t/hm2 和 10 5 0kg/hm2 ·a ;枯枝落叶现存量为 0 .996t/hm2 ,占林分平均生物量的 1.2 8% ,林分年枯枝落叶量为 996kg/hm2 ·a ,占林分生产力的11.15 %。
A preliminary study of plant biomass and production of the recommended Gupressus lusitanica in 1980s in the mountain area of middle Sichuan Province is presented here.The spruce tree, living plant cover and dead branches and leaves were observed by 'average standard tree'and 'divided-storeys' method.The following regression equations were divided from the standing crop of the destructive trees.The structure of output and productive forces have been examined. The results show that the estimated total biomass of Gupressus lusitanica is 77.756 t/hm 2.The productivity is 8 928.73 kg/hm 2·a. in which the percentage of trunks, barks,branches, leaves and roots are 54.00%,19.62%,18.19%,8.19%,respectively. The biomass percentages of Gupressus lusitanica,herbs and dead branches and leaves are 97.37%,1.35% and 1.28% respectively. The productivity percentages of Gupressus lusitanica,herbs are 77.09%,11.76% respectivity.The annual litter and drying trees productivity of Gupressus lusitanica,is 996 kg/hm 2·a, with their percentage being 11.15%.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2002年第2期133-136,共4页
Resources and Environment in the Yangtze Basin
基金
"九五"国家攻关课题"长江中上游防护林经营利用技术研究"内容之一部分
关键词
墨西哥柏
人工林
四川
生物量
生产力
回归方程
forestry of plantation,Gupressus lusitanica
Sichuan prorince
biomass
productive forces
