| 宿少锋1，2，薛 杨1，2，杨众养1，2，王小燕1，2，林之盼1，2.海南文昌不同林龄木麻黄人工林碳储量分配格局[J].广东农业科学,2018,45(11):46-52 |
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海南文昌不同林龄木麻黄人工林碳储量分配格局 |
| Carbon storage allocation pattern of Casuarina equisetifolia Forst with different ages in Wenchang city of Hainan |
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| DOI：10.16768/j.issn.1004-874X.2018.11.008 |
| 中文关键词: 海南 木麻黄 林龄 生物量 估算模型 |
| 英文关键词: Hainan Casuarina stand age biomass estimation model |
| 基金项目:海南省省属科研院所技术开发专项（KYYS-2018-24） |
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| 中文摘要: |
| 利用木麻黄各器官生物量模型，对海南文昌不同林龄木麻黄人工林生态系统碳储量及分配特征进行研究，结果表明：木麻黄人工林乔木层各器官含碳量变化范围在454~526 g/kg之间，器官平均含碳量表现为树根＞树叶＞果＞树干＞树枝＞树皮；0~60 cm土壤碳含量变化范围在0.8~9.3 g/kg之间，平均含碳量仅为3.6 g/kg，同一林龄不同土壤层含碳量差异显著，土壤含碳量随林龄的增加呈递增趋势。不同林龄乔木层碳储量表现为过熟林（233.1 t/hm2）＞成熟林（165 t/hm2）＞近熟林（99.8 t/hm2）＞中龄林（56.0 t/hm2）＞幼龄林（27.1 t/hm2），不同林龄间同一器官的碳储量均呈显著差异，除中龄林、近熟林枝与叶间差异不显著外，同一林龄不同器官间也均呈显著差异；土壤碳储量表现为成熟林（34.27 t/hm2）＞近熟林（22.97 t/hm2）＞过熟林（20.8 t/hm2）＞中龄林（15.92 t/hm2）＞幼龄林（12.27 t/hm2），相同林龄0~10、10~20、20~40 cm土层间均呈显著差异，相同土层不同林龄间部分差异显著性不一。可见，乔木层和土壤层碳储量为生态系统主要碳库，其中乔木层碳储量约占79.85%，为第一碳库。 |
| 英文摘要: |
| Using the biomass estimation models of Casuarina equisetifolia, we studied the carbon storage and distribution characteristics of C. equisetifolia plantations in Wenchang with different forest ages. The results showed that, the carbon contents of each organ in the C. equisetifolia was in 454~526 g/kg, the average carbon content in each component was: root ＞ leaf ＞ fruit ＞ trunk ＞ branche ＞ bark. The carbon contents in 0-60 cm soil ranged from 0.8 to 9.3 g/kg, and the average carbon content was only 3.6 g/kg. There was significant difference about the carbon content in different soil layers with the same forest age, and the rate of soil carbon content increased with the forest age. Carbon storage order of arbor layer in different forest ages was: over-ripe forest (233.1 t/hm2)＞ mature forest (165 t/hm2)＞ near-mature forest (99.8 t/hm2)＞ middle-aged forest (56.0 t/hm2)＞ young in the aged forest (27.1 t/hm2). The carbon storage of the same organ in different forest ages showed significant differences (P＜0.05), and there was no significant difference between branches and leaves of the middle-aged forest and the near-maturing forest, but there was significant difference among different organs at different ages (P＜0.05). The order of soil carbon storage in different forest ages was: mature forest (34.27 t/hm2)＞ near-maturing forest (22.97 t/hm2)＞ over-ripe forest (20.8 t/hm2)＞ middle-aged forest (15.92 t/hm2)＞ young Lin (12.27 t/hm2), and the same forest age in 0 ~ 10 cm, 10 ~ 20 cm, 20 ~ 40 cm soil layer showed significant differences (P ＜0.05). Besides, the same soil layer between the different ages of the forest was not significant one. The carbon storage in the arbor layer and soil layer werethe main carbon pools of the ecosystem. The carbon storage of the arbors layer was the first carbon pool, which accounts for 79.85%. |
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