Author(s)

Jiao Sun^1,2, Junfeng Li^3*, Gaihe Yang⁴, Wenfang Hao^1*

¹College of Life Science, Northwest Agriculture and Forest University, Yangling, Shaanxi, China.
²Institute of Agricultural Resources and Environment, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan, Ningxia, China.
³College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi, Xinjiang, China.
⁴College of Agriculture, Northwest Agriculture and Forest University, Yangling, Shaanxi, China.

Soil water-stable aggregates (WSAs) are the basic unit of soil constitution and can contribute to remaining the stable soil constitution. The objective of this study was to clarify the distribution and stability of WSAs and the soil organic carbon (SOC), the total nitrogen (TN), and the total phosphorus (TP) concentrations in 0 - 20 cm and 20 - 40 cm soil layers under the different ages of Robinia pseudoacacia plantations. The 20, 25, 40, and 50 years-old Robinia pseudoacacia plantations were selected. Stepwise regression analysis showed that >5 mm and 1 - 2 mm WSAs, SOC concentration in 2 - 5 mm WSAs, and TN and TP concentrations in < 0.25 mm WSAs were dominant independent variables affecting aggregate stability and that SOC in 0.25 - 0.5 mm WSAs, TN in <0.25 mm and 1 - 2 mm WSAs and TP in 2 - 5 mm WSAs were dominant independent variables affecting SOC, TN, and TP concentrations in bulk soils.

Soil Water-Stable Aggregate, Robinia pseudoacacia Plantation, Soil Nutrient

Sun, J. , Li, J. , Yang, G. and Hao, W. (2016) Accumulative Effect of Soil Organic Carbon and Nitrogen in Water-Stable Aggregates and Soil Stability Characteristics of Robinia pseudoacacia Plantation in the Loess Hilly-Gully Region. Open Journal of Soil Science, 6, 204-221. doi: 10.4236/ojss.2016.612019.