蚌湖表层土壤有机碳的分布特征  

Distribution Characteristics of Organic Carbon in Surface Soils in Banghu Lake

作　　者：谢冬明[1] 周国宏[1] 周杨明[2] 陈亚云[1] 贾俊松[2] 彭小英[1] 卢锐[1] 殷照华[1] 熊晓龙[1] 余明泉[1] 

机构地区：[1]江西科技师范大学,江西南昌330038 [2]江西师范大学地理与环境学院,江西南昌330022

出　　处：《湿地科学》2017年第1期25-31,共7页Wetland Science

基　　金：国家自然科学基金地区项目(31360120;41561105;71473113);江西省自然科学基金项目(20132BAB203030);江西省科技支撑计划项目(20151BBG70014);江西省教育厅科技项目(GJJ150794);江西省对外科技合作项目(20151BDH80022);江西科技师范大学青年拔尖人才项目(2015QNBJRC008);江西科技师范大学科研创新团队项目(2016CXTD002)资助

摘　　要：于2016年1月21~23日,以蚌湖为研究区,在高程10~17 m区间,以1 m为落差,设置7个采样带,分别采集7个采样带0~20 cm深度的土壤样品,分析其有机碳含量。结果表明,蚌湖0~20 cm深度土壤有机碳含量具有较为明显的梯度特征,0~10 cm深度土壤有机碳含量最高值出现在高程14~15 m采样点,最低值出现在高程16~17 m采样点,变化范围为6.36~23.32 g/kg;10~20 cm深度土壤有机碳含量最高值出现在高程14~15 m采样点,最低值出现在高程15~16 m采样点,变化范围为4.74~8.88 g/kg;0~10 cm深度土壤有机碳含量比10~20 cm深度土壤有机碳含量的梯度分布更明显。0~10 cm深度土壤有机碳含量与地上生物量显著正相关(p<0.05),与其它因子不相关;10~20 cm深度土壤有机碳含量与土壤含水量显著正相关(p<0.05),与其它因子不相关。In this paper, the Banghu Lake of Poyang wetlands was used as an example to analyze the contents of organic carbon in surface soils. The sampled elevations were from 10 m to 17 m, with a depth of 0-20 cm. The result showed that the gradient change of organic carbon was different between 0-10 cm and 10-20 cm depths. In the soil of 0-10 cm depth, the highest content of organic carbon was in the elevation of 14-15 m, and the lowest content was in the elevation of 16-17 m, the range was 6.36-23.32 g/kg. However, in the soil of 10-20 cm depth, the highest content of organic carbon was in the elevation of 14-15 m, and the lowest content was in the elevation of 15-16 m, the range was 4.74-8.88 g/kg. The correlation of organic carbon, overground biomass, inundation period, and elevation was analyzed by the Pearson method. It was found the correlation of organic carbon in soil of 0-10 cm depth was significant with overground biomass in 0.05 level, but the cor- relation was not significant with any others variants. Similarly, the correlation of organic carbon in soil of 10-20 cm depth was significant with soil moisture content, but was also not significant with any others vari- ants. Thus, it could be concluded the gradient characteristics of the organic carbon in the Banghu marshland of Poyang Lake wetland were driven and controlled by synthetically different factors.

关 键 词：土壤有机碳 梯度 相关 蚌湖 

分 类 号：S153.6[农业科学—土壤学]