论文部分内容阅读
以海南儋州、屯昌、琼海三个市县的9个桉树林样地为试验对象,通过分析土壤碳含量、碳密度以及土壤碳储量,对海南省桉树林土壤固碳情况进行研究。主要结果如下:(1)海南岛桉树林不同林分类型土壤碳含量存在着较大的差异,介于3.15±0.81~47.99±3.73 g/kg之间,平均碳含量为12.74±10.74 g/kg;(2)平均碳储量为133.80 t/hm2,低于我国森林土壤平均碳储量但高于热带林土壤碳平均储量;(3)海南省桉树林土壤碳含量、碳密度、碳储量,均以表层土含量最大,并随土壤深度的增加而降低;(4)土壤碳储量随土层的分配率显示海南岛桉树林目前受到的人为干扰较严重,但除4年龄的桉树林对外界干扰较敏感外,其余都有较强的缓冲能力。(5)海南岛桉树林土壤碳储量随着林龄变化没有完全一致的规律,但2年龄<6年龄<4年龄比较普遍。
Nine eucalyptus forests in Hainan Pizhou, Tunchang and Qionghai were selected as test objects to study the soil carbon sequestration in Eucalyptus forests of Hainan Province by analyzing soil carbon content, carbon density and soil carbon storage. The main results are as follows: (1) The soil carbon content of different types of forests in Eucalyptus forests in Hainan Island is quite different, ranging from 3.15 ± 0.81 to 47.99 ± 3.73 g / kg with an average carbon content of 12.74 ± 10.74 g / kg ; (2) The average carbon storage is 133.80 t / hm2, which is lower than the average carbon storage of forest soil in China but higher than that of tropical soil. (3) The soil carbon content, carbon density and carbon storage in Eucalyptus forest in Hainan Province are (4) The distribution of soil carbon storage with the distribution of soil shows that the eucalyptus forest in Hainan Island is currently suffering more serious human disturbance, but the disturbance of the environment except for 4-year-old eucalyptus forest to the outside world is more serious Sensitive, the rest have a strong buffer capacity. (5) The soil carbon storage of eucalyptus forests in Hainan Island is not completely consistent with the change of forest age, but 2-year-old <4-year-old <4 years old is more common.