摘要
以广州市典型风水林为对象,对其生态系统全组分碳储量及其分配格局进行调查和估算,研究碳密度特征及其影响因素。结果显示:风水林生态系统平均碳密度为(259.17±69.67)t/hm^2,其中,植被碳密度为(194.04±54.07)t/hm^2(占74.9%)(其中以乔木层占绝对优势,达90%以上),土壤碳密度为(65.13±19.30)t/hm^2(占25.1%);植被和土壤碳密度之间呈显著正相关(P<0.05);不同优势种类的风水林碳密度差异较大,以米槠(Castanopsis carlesii(Hemsl.)Hayata.)为优势的林分碳密度最大(310.57±62.65 t/hm^2)。结果表明影响风水林碳密度的主要因子是林分胸高断面积、林分密度、土壤容重和土壤碳含量,其中,风水林碳密度与胸高断面积、土壤容重和土壤碳含量呈显著正相关,与林分密度呈显著负相关,与植物多样性无显著相关。研究结果对南亚热带林分改造和碳汇林营造具有重要科学意义。
Typical geomantic forests were studied in Guangzhou,and their carbon(C)density composition and distribution patterns were investigated.Ecosystem,vegetation,and soil C density were(259.17±69.67)t/hm^2,(194.04±54.07)t/hm^2,and(65.13±19.30)t/hm^2,respectively.The C densities of different dominant species in the geomantic forests differed significantly,with the highest C density for Castanopsis carlesii(Hemsl.)Hayata.(310.57±62.65 t/hm^2).The ecosystem C storage was dominated by the tree layer(more than 90%of the vegetation).The main factors that affected forest vegetation C density in the geomantic forest were mean tree diameter at breast height(DBH),stand basal area(BA),stand density,soil bulk density,and soil C content,but not the species diversity indices.These results confirmed the importance of stand structure on C storage and dynamic reallocation in geomantic forests.Therefore,improving the complexity of community structure in geomantic forests during forest management might enhance forest C storage.
作者
马志婷
周璋
李意德
陈德祥
赵厚本
骆土寿
许涵
陈洁
吴建辉
张霞
Ma Zhi-Ting;Zhou Zhang;Li Yi-De;Chen De-Xiang;Zhao Hou-Ben;Luo Tu-Shou;Xu Han;Chen Jie;Wu Jian-Hui;Zhang Xia(Research Institute of Tropical Forestry, Chinese Academy of Forestry, Jianfengling Long-term Research Station for Tropical Forest Ecosystem, Guangzhou 510520, China;Nanjing Forestry University, Nanjing 210037, China)
出处
《植物科学学报》
CAS
CSCD
北大核心
2020年第4期506-516,共11页
Plant Science Journal
基金
广州市森林碳汇计量与监测研究项目(穗林园科信[2016]-06号)
广东省林业科技创新项目(2020KJCX006)。
关键词
风水林
碳密度
林分结构
物种多样性
土壤碳
Geomantic forest
Carbon storage density
Stand structure
Species diversity
Soil carbon
