| 摘要: |
| 为探究广州市常见园林植物夏季光合特性及其固碳释氧能力，以广州市园林 9 种典型园
林树种幼苗为研究材料，采用 Li-Cor6400 便携式光合测定仪测定光合参数特征和光响应曲线，计算
各苗木的日固碳释氧能力，分析光合速率影响因素，并以单位绿化面积固碳量作为衡量各树种苗木吸
收 CO2 能力的特征向量进行聚类分析。结果表明：9 种的园林树种幼苗单位叶面积固碳量和释氧量分
别为 6.25~11.93、4.55~8.68 g · m-2 · d-1
，单位绿化面积固碳量和释氧量分别为 1.87~10.37、1.33~7.54
g · m-2 · d-1
，9 个园林树种苗木的光合净固碳量按高低排序可分为 3 类，单株植物单位绿化面积固碳量较高
（9.44~10.37 g · m-2 · d
-1
）的有铁冬青 Ilex rotunda、枫香 Liquidambar formosana、假苹婆 Sterculia lanceolata、
糖胶树 Alstonia scholaris，中等（7.19~8.38 g · m-2 · d
-1
）的有仪花 Lysidice rhodostegia、樟树 Cinnamomum
camphora，较低（1.87~5.89 g · m-2 · d-1
）的有杧果 Mangifera indica、木油桐 Aleurites montana、鱼尾葵
Caryota ochlandra。综合考虑植物的光合及固碳特性，在树种配置时，枫香、糖胶树、假苹婆和铁冬青为
优选乔木树种。 |
| 关键词: 园林树种 光合作用 固碳释氧 碳汇 |
| DOI： |
| 分类号: |
| 基金项目:省自然科学基金 广东省林业科技创新项目：基于高碳汇目标的造林树种筛选和林分结构研究 |
|
| Study on Photosynthetic Characteristics and Carbon Fixation and Oxygen Release Capacity of Nine Garden Plant Seedlings |
|
GU Jiawei, XIAN Li-hua, ZHENG Feng-lin, CHEN Hong-yue
|
|
College of forestry and landscape architecture,South China Agricultural University
|
| Abstract: |
| To explore the photosynthetic characteristics and carbon ?xation and oxygen release capacity of
common garden plants in Guangzhou in summer, seedlings of 9 typical garden tree species in Guangzhou were
used as research materials. The characteristics of photosynthetic parameters were measured with a Li-Cor6400
portable photosynthetic analyzer, and the daily carbon ?xation and oxygen release capacity of each seedling was
calculated quantitatively. The light response parameters and the factors affecting the photosynthetic rate were
analyzed. The carbon ?xation per unit green area was used as the feature vector to measure the CO2 absorption
capacity of each species of seedlings for cluster analysis. The results showed that the carbon ?xation and oxygen
release per unit leaf area of seedlings of nine garden tree species were 6.25-11.93 g·m-2
·d-1
and 4.55-8.68 g·m-2
·d-1
respectively, and the carbon sequestration and oxygen release per unit land surface were 1.87-10.37 g·m-2
·d-1
and
1.33-7.54 g·m-2
·d-1
respectively. The photosynthetic net carbon sequestration of the seedlings of nine garden tree
species can be divided into three categories according to the order of high and low. The higher carbon(9.44-10.37 g·m-2
·d-1
) sequestration per unit green area of a single plant is Ilex rotunda , Liquidambar formosana, Sterculia
lanceolata, Alstonia scholaris, the medium(7.19-8.38 g·m-2
·d-1
) is Lysidice rhodostegia, Cinnamomum
camphora, and the lower(1.87-5.89 g·m-2
·d-1
) is Mangifera indica, Aleurites montana, and Caryota ochlandra .In
consideration of the photosynthetic and carbon ?xation characteristics of plants, Liquidambar formosana, Alstonia
scholaris, Sterculia lanceolata, and Ilex rotunda are the best tree species for tree species allocation. |
| Key words: garden tree species photosynthetic carbon ?xation and oxygen release carbon sink |
