Characteristics of soil stability and carbon sequestration under water storage and drainage model

3rd International Conference on Agricultural and Biological Sciences

农业科学;生物科学

Li, J.^1,2,3 ; Han, J.C.^1,3 ; Chen, C.^1,3 ; Yang, J.J.^1,3

Shaanxi Province Land Engineering Construction Group, Xi'an

710075, China^1

College of Forestry, Northwest A and F University, Yangling

712100, China^2

Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Land and Resources of China, Xi'an

710075, China^3

关键词: Correlation coefficient;    Fractal dimensions (d);    Organic carbon storages;    Soil organic carbon content;    Soil organic carbon storages;    Soil physical property;    Soil water-stable aggregates;    Water stable aggregates;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/77/1/012009/pdf
DOI  :  10.1088/1755-1315/77/1/012009

来源: IOP

【 摘 要 】

This research was conducted to investigate the influence of saline alkali soil on soil physical properties, stability and organic carbon storage under water storage and drainage, and to provide scientific basis for improving soil quality in Fuping County of Shaanxi Province, China. Saline alkali soil model test was conducted and the process was assessed with two different methods: i) traditional drainage and ecological water storage, measure and analyze 0-30 cm soil bulk density, porosity, field water capacity, mean mass diameter (MWD), geological mean diameter (GMD), stability of water stable aggregate (WASR), aggregate destruction rate (PAD), fractal dimension (D) and; ii) organic carbon storage, comprehensively analyze the relationship between stability index and soil organic carbon. The results show that: (1) compared with traditional drainage treatment, water treatment may effectively reduce the soil bulk density by 1.3%-4.2%, and improve soil porosity and field capacity at the same time; (2) under dry and wet screen treatment, soil stability, the water storing treatment is higher than the drainage treatment. Performance trend of soil MWD and GMD increases with the increase of soil depth. The stability of soil water stable aggregates increased 14.5%-53.4%. The average aggregate destruction rate was 3.2% lower than that of the drainage treatment and the difference is obvious (P2=0.86 and R2=0.94, and the difference is obvious (P