论文部分内容阅读
该研究通过对海南西部不同林龄橡胶人工林土壤剖面进行有机碳含量实测,估算土壤有机碳储量,结果表明4种不同林龄橡胶人工林生态系统土壤有机碳含量为6.20～14.36g/kg;橡胶人工林土壤有机碳碳含量随土壤层的增深而逐渐减少,除33a胶林0～60cm各层土壤有机碳含量差异显著外,其他同一林龄橡胶人工林不同土壤层间差异不显著,不同林龄橡胶人工林在同一土壤层间有机碳含量差异显著,土壤有机碳集中于0～30cm土壤层;5、10、19和33a橡胶人工林生态系统土壤有机碳储量分别为76.85、74.48、81.74和85.31t/hm2。气候条件、土壤质地、凋落物量累积与分解、林龄大小和胶林经营管理是影响橡胶人工林土壤有机碳蓄积的主导因子。
In this study, soil organic carbon storage was estimated by measuring the organic carbon content in the soil profiles of rubber plantations of different ages in western Hainan. The results showed that the soil organic carbon content of the four plantations varied from 6.20 to 14.36 g / kg. The content of soil organic C in rubber plantation decreased with the increase of soil depth. The difference of soil organic C content in 0 ~ 60cm layer of 33a rubber plantation was significantly different, while the difference in different soil layers of rubber plantation of the same age was not significant, There was significant difference in organic carbon content in the same soil layer between different age stands of rubber plantations, with soil organic carbon concentrated in 0-30cm soil layer. Soil organic carbon storage in the rubber plantation ecosystem of 5, 10, 19 and 33a were 76.85 and 74.48, 81.74 and 85.31 t / hm2. Climatic conditions, soil texture, litter mass accumulation and decomposition, forest size and rubber plantation management are the main factors affecting the accumulation of soil organic carbon in rubber plantations.