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| 典型峰林平原土壤有机碳储量和分布特征研究 | |
| 引用本文： | 陈曦,彭稳,曹建华.典型峰林平原土壤有机碳储量和分布特征研究[J].科技通报,2012,28(2):167-173. |
| 作者姓名： | 陈曦 彭稳 曹建华 |
| 作者单位： | 1. 北京大学城市与环境学院,北京100871;北京大学深圳研究生院城市规划与设计学院,广东深圳518055;中国地质科学院岩溶地质研究所,国土资源部岩溶动力学重点实验室,广西桂林541004 2. 中国地质科学院岩溶地质研究所,国土资源部岩溶动力学重点实验室,广西桂林541004;中铁工程设计咨询集团有限公司,北京100055 3. 中国地质科学院岩溶地质研究所,国土资源部岩溶动力学重点实验室,广西桂林541004 |
| 基金项目： | 负责人:曹建华,国家基金面上项目(40872213);地调项目(水[2010]矿评03-07-02);广西科技厅资助项目(11-031-06) |
| 摘 要： | 以桂林峰林平原岩溶区为例分析了土壤和土壤剖面的有机碳含量,计算了土壤有机碳密度以及9.27 km2研究区的土壤有机碳库储量。研究表明:土壤有机碳含量变化范围为2.46～17.89 g.kg-1,且随着土壤深度的增加而呈现递减的趋势。水田中土壤剖面的土壤有机碳含量变化幅度最大;表层0～20cm的土壤有机碳密度2.29～5.35 kg.m-2,平均值为3.65 kg.m-2;而0～100cm土壤有机碳密度值范围为5.88～13.54 kg.m-2,平均碳密度为9.83 kg.m-2。0～20cm土壤有机碳密度为水田>弃耕地>旱地>易涝地>园地>林地>草地,而0～100cm土壤有机碳密为弃耕地>园地>旱地>水田>林地>易涝地>草地。研究区表层0～20cm的土壤有机碳储量为2.785×104t,而0～100cm的土壤有机碳储量为8.514×104t。表层土壤0～20cm土壤有机碳储量占0～100cm的32.7%。与受人类活动干扰较少的重庆金佛山研究结果相比,本区的土壤有机碳密度明显偏低,这意味着岩溶区土壤有机碳容易受到人为干扰、易分解、易流失。而不同的土地利用、耕作方式及管理措施也影响着土壤碳库的大小,合理安排土地利用方式,将有助于土壤有机碳的累积和农业生产活动。 |
| 关 键 词： | 峰林平原 土壤有机碳 土壤碳储量 岩溶 |
Study on the Distribution and Reserves Features of Soil Organic Carbon in the Typical Peak-forest Plain,Southwest China |
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| CHEN Xi , PENG Wen , CAO Jianghua.Study on the Distribution and Reserves Features of Soil Organic Carbon in the Typical Peak-forest Plain,Southwest China[J].Bulletin of Science and Technology,2012,28(2):167-173. | |
| Authors: | CHEN Xi PENG Wen CAO Jianghua |
| Institution: | CHEN Xi1,2,3,PENG Wen3,4,CAO Jianghua3(1.College of Urban and Environmental Sciences,Peking University,Beijing 100871,China 2.School of Urban Planning and Design,PKU Shenzhen Graduate School,Shenzhen 518055,China 3.Institute of Karst Geology,CAGS,Karst Dynamics Laboratory,MLR,Guilin 541004,China 4.China Railway Engineering Consultants Group,Beijing 100055,China) |
| Abstract: | To study the distribution and reserves features of soil organic carbon in the typical peak-forest plain in karst area,the soil samples from the garden plot,woodland,meadow,dry land,paddy land,derelict land and waterlogged lowland were collected in Renhe village,9.27Km2 area where the peak-forest plain landform is typical.And the soil organic carbon contents were detected.The results showed that the variation rank of soil organic carbon values was from 2.46-17.89g/kg in which the rangeability of SOC in paddy land was the greatest.Moreover,the SOC value was reducing with the increasing of soil depth.The SOCD range from 2.29-5.35 kg·m-2 with the average value of 3.65 kg·m-2 in 0-20cm soil depth,and 5.88-13.54 kg·m-2 with the average value of 9.83 kg·m-2 in 0-100cm soil depth.The soil organic carbon density in 0-20cm is paddy land> derelict land> dry land> waterlogged lowland> garden plot> woodland> meadow,and in 0-100cm is derelict land> garden plot> dry land> paddy land> woodland> waterlogged lowland> meadow.The soil organic carbon reverses in the whole area was 2.785x104t in 0-20cm soil layer and 8.514 x104t in 0-100cm soil layer,the former is 32.7% of the latter which indicated that the topsoil was vital important in the study of soil organic carbon storage capacity and variations in the peak-forest plain.According to the comparison with the study in Jinfo mountain area where the human activities was scarce,the soil organic carbon density in this study is obviously lower which indicated that the soil organic in karst area was disturbed easily by human activities,labile and transported more readily.Therefore,the storage capacity of soil organic carbon reservoir was under the influence of landuse types,the farming methods and control measures.Furthermore,to find out the distribution features,storage capacity and reserves of the soil organic carbon was extremely significant to the guidance of agriculture activities and sufficient utilization and management of land resources. |
| Keywords: | peak-forest plain soil organic carbon soil organic carbon reserves karst |
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