摘要
基于2014年上海市森林资源连续清查统计报告和2013-2014年乔木林典型样地实测数据,采用转换因子连续函数法(CM法)和单木异速生长方程法(AM法)对上海全市乔木林生物量进行估算。结果显示:2种方法估算的乔木林总生物量较为接近,分别为4.828×106和4.805×106t,前者仅比后者高0.47%。樟树Cinnamomum camphora,其他硬阔类,阔叶混,水杉Metasequoia glyptostroboides,其他软阔类和杨树Populus是上海乔木林生物量的主要贡献者, CM法估算这6个树种组在总生物量中占比为88.7%, AM法估算占比为85.7%。幼、中龄林是上海乔木林生物量的主体部分, CM法估算这2个龄组在总生物量中占比为86.2%, AM法估算占比为79.3%。自1999年起上海市乔木林总生物量持续快速增长,到2016年接近6.400×106t; 1999-2016年乔木林总生物量年均增长率为19.2%,超过同期乔木林总面积的年均增长率(16.8%)。乔木林单位面积生物量同样总体上呈增长趋势,到2016年达75.7 t·hm-2。由此认为:CM法和AM法在上海市乔木林总生物量估算上具有较好的一致性;过去20 a,上海城市森林资源的数量和质量都有显著提升,且仍存在一定上升空间。
The objectives of this study are to estimate the total biomass of forests in Shanghai and its temporal dynamic during the past two decades. Taking report data from a continuous inventory of forest resources in2014 and in-situ measured data from typical sample plots of forests in 2013-2014, biomass of forests in Shanghai were estimated using the conversion factor continuous function method(CM) and the allometric growth equation method(AM). Results showed that the total biomass of forests in Shanghai in 2014 estimated by CM(4.828×106 t) and AM(4.805×106 t) were similar with CM only 0.47% higher than AM. The six main contributors to forest biomass in Shanghai were forests of Cinnamomum camphora, other hardwood, mixed broadleaf,Metasequoia glyptostroboides, other softwood, and poplar. These six species groups occupied 88.7%(CM) and85.7%(AM) of the total forest biomass in Shanghai with young and medium-aged forests occupying 86.2%(CM) and 79.3%(AM). CM estimates showed that forest biomass had increased since 1999 approaching6.400 ×106 t in 2016. The average annual growth rate of forest biomass from 1999 to 2016 in Shanghai was19.2% exceeding the average annual growth rate of forested areas(16.8%). Meanwhile, biomass per unit area of forest also showed an overall growth movement reaching 75.7 t·hm^-2 by 2016. In conclusion, CM and AM were relatively consistent in estimating the total biomass of forests in Shanghai. The biomass estimates showed both quantity and quality of Shanghai forests improved markedly during the past two decades, which were expected to increase further in the future.[Ch, 2 fig. 4 tab. 35 ref.].
作者
仲启铖
傅煜
张桂莲
ZHONG Qicheng;FU Yu;ZHANG Guilian(Shanghai Academy of Landscape Architecture Science and Planning, Shanghai 200232, China;Shanghai Engineering Research Center of Landscaping on Challenging Urban Sites, Shanghai 200232, China)
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2019年第3期524-532,共9页
Journal of Zhejiang A&F University
基金
"十三五"国家重点研发计划项目(2017YFC0505706)
国家自然科学基金资助项目(31800411)
上海市自然科学基金资助项目(17ZR1427400)
上海市科学技术委员会崇明科技专项(15dz1210905)
关键词
森林生态学
乔木林
生物量
转换因子连续函数
单木异速生长方程
上海
forest ecology
arbor forest
biomass
conversion factor continuous function method
allometric growth equation
Shanghai
