Tang Jie, Zhang Wen-Hui, Li Zhao-Yang, Zhang Nan, Hu Meng
College of Environment and Resources, Jilin University, Changchun 130012, China.
Huan Jing Ke Xue. 2013 Jul;34(7):2788-92.
Taking Qianguo paddy field of Jilin Province as investigation object, based on the soil test data of 7 different periods developed for 4 to 55 years, the vertical distribution of SOC content in the 1 m paddy field section was studied adopting the space scale method instead of time scale. The paddy soil carbon sink in last 20 years was discussed and the organic carbon storage of Qianguo paddy field soil was estimated. According to the second soil census data, the characteristics of soil SOC used in fields of different type were comparatively analyzed. The results showed that the paddy field SOC decreased from top to bottom by layer, which showed an increasing trend with the increase of development age; the organic carbon content in the surface soil layer (0-30 cm) (1 820.79 t) was 46.87% of the total organic carbon storage in deep soil (3 885.05 t), and the soil SOCD content was highly different depending on the type of field, ranked in descending order as paddy field, dry land, and saline field. The development of paddy field is a SOC accumulating carbon sink process, which is conducive to the transfer of organic carbon from the surface soil layer to the bottom soil layer.
以吉林省乾安稻田为研究对象，基于4至55年7个不同时期的土壤测试数据，采用空间尺度法而非时间尺度法研究了1米稻田剖面中土壤有机碳（SOC）含量的垂直分布。探讨了过去20年稻田土壤碳汇情况，并估算了乾安稻田土壤有机碳储量。依据第二次土壤普查数据，对不同类型农田土壤有机碳特征进行了对比分析。结果表明，稻田土壤有机碳自上而下呈层状递减，且随发育年限增加呈上升趋势；表层土壤（0 - 30厘米）有机碳含量（1820.79吨）占深层土壤（3885.05吨）总有机碳储量的46.87%，土壤有机碳密度（SOCD）含量因农田类型差异显著，由高到低依次为稻田、旱地、盐碱地。稻田的发育是一个土壤有机碳积累的碳汇过程，有利于有机碳从表层土壤向底层土壤转移。
