论文部分内容阅读
采用超声波分散分离提取土壤微团聚体 ,通过测定有机碳含量、分析碳稳定性同位素 ,研究了退化红壤在植被恢复下土壤微团聚体粒组分布与有机碳分布 .结果表明 ,植被恢复尤其是豆科 -禾本科植物轮作较快地增加了土壤有机碳储存 ,这种碳存储表现为 2～ 0 .2 5mm团聚体的建成 ,并对微团聚体有机碳的稳定性同位素组成分异产生影响 .本文揭示了我国广泛实施的区域土壤治理和植被恢复措施促进了土壤碳截存 ,可以认为显著地贡献于陆地系统对大气CO2 的汇作用
Soil microaggregates were extracted by ultrasonic dispersive separation, and the carbon stable isotopes were analyzed by measuring the content of organic carbon. The distribution of soil micro-aggregates and the distribution of soil organic carbon under degraded red soils were studied. The results showed that vegetation recovery, Section - gramineous plant rotation faster increase in soil organic carbon storage, the carbon storage performance of 2 ~ 0 .2 5mm agglomerates built, and microaggregate organic carbon stability of the isotopic composition differences. This paper reveals that the widespread implementation of regional soil erosion control and vegetation restoration measures in our country promotes soil carbon sequestration and can be considered as a significant contributor to the sink effect of terrestrial systems on atmospheric CO2