| 摘要: |
| 为准确估测森林碳储量和碳汇能力、 以及下木的生物质利用提供基本信息, 研究采用湿烧法
对湛江市廉江市和河源市龙川县松林样地的松类下木 (简称松类下木) 进行碳含率测定, 同时采用氧弹
燃烧法对其相应的热值进行了分析。 结果显示, 龙川县松类下木的碳含率 (514. 62 g·kg
-1
) 显著高于廉
江市 (497. 69 g·kg
-1
) (P<0. 05), 树干、 树根和整株碳含率在不同地域间存在显著差异 (P<0. 05),
树枝、 树叶的碳含率差异不显著; 不同地域、 径阶的松类下木的热值特征差异不显著, 树叶的热值最高,
树根最低; 松类下木的碳含率和热值之间相关性不显著。 径阶对热值没有显著影响, 可能处于幼龄期的
树木尚未完成生理成熟过程, 其径向生长与热量转化效率尚未形成显著梯度; 是否亚热带比热带更利于
松类下木将太阳能转化成化学能, 有待于进一步研究。 |
| 关键词: 下木 松类 碳含率 热值 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业科技创新平台建设项目 (2016CXPT03), 广东省低碳发展专项资金支持项目 (办资字 [2012] 14 号), 广东 省林业科技创新专项基金科研项目 (2012KFCX019-01)。 |
|
| Carbon Content and Calorific Value in Pine Understory Vegetation in Guangdong Forests |
|
Zhang Hong-ai1, Yang Jiazhi1, Ding Sheng1, WANG Qiulai2, HUANG Ninghui2, SU Chenhui2, CHEN Pan2, YANG Zhigang2
|
|
1.Guangdong Province Forestry Investigation and Planning Institute,Guangshan Road No. 338,guangzhou,guangdong,510520;2.Guangdong Province Forestry Investigation and Planning Institute
|
| Abstract: |
| To fundamental information for accurately estimating forest carbon storage and carbon sink capacity and evaluating the biomass utilization potential of understory vegetation, this study utilized the wet combustion method to determine the carbon content of Pine understory vegetation in Lianjiang city (Zhanjiang) and
Longchuan county (Heyuan), while simultaneously analyzing their corresponding calorific values using oxygen
bomb calorimetry. The results showed that the carbon content rate of the Pine understory in Longchuan county
(514. 62 g·kg
-1
) was significantly higher than that in Lianjiang city (497. 69 g·kg
-1
) (P<0. 05). There
were significant differences in the carbon content of trunk, root, and the whole plant among different regions
(P<0. 05), but there was no significant difference in the carbon content of branches and leaves. There was no
significant difference in the calorific value characteristics of Pine understory in different regions and diameter classes. The calorific value of leaves was the highest and the that of roots was the lowest. The correlation between
carbon content and calorific value of Pine understory was not significant. The lack of significant effect of diameter class on calorific value, is likely attributable to the juvenile period stage of these trees, where incomplete
physiological development results in limited variation in carbon storage capacity. Whether the subtropical climates
enhance the photosynthetic energy conversion efficiency of Pine understory vegetation compared to tropical climates requires further investigation. |
| Key words: underwood pine tree carbon content rate calorific value |
