Soil nutrient concentration and distribution at riverbanks undergoing different land management practices: Implications for riverbank management

3rd International Conference on Water Resource and Environment

地球科学;生态环境科学

Xue, X.H.^1 ; Chang, S.^1 ; Yuan, L.Y.^2

College of Bioscience and Technology, Hubei University for Nationalities, Enshi, Hubei

445000, China^1

College of Horticulture and Landscape Architecture, Yangtze University, Jingzhou, Hubei

434025, China^2

关键词: Agricultural activities;    Comparative studies;    Ecological effect;    Land management practices;    Management practices;    Soil nutrient distributions;    Soil organic matters;    Subsurface layer;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/82/1/012035/pdf
DOI  :  10.1088/1755-1315/82/1/012035

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Riverbanks are important boundaries for the nutrient cycling between lands and freshwaters. This research aimed to explore effects of different land management methods on the soil nutrient concentration and distribution at riverbanks. Soils from the reed-covered riverbanks of middle Yangtze River were studied, including the soils respectively undergoing systematic agriculture (gathering young tender shoots, reaping reed straws, and burning residual straws), fires and no disturbances. Results showed that the agricultural activities sharply decreased the contents of soil organic matter (SOM), N, P and K in subsurface soils but less decreased the surface SOM, N and K contents, whereas phosphorus were evidently decreased at both surface and subsurface layers. In contrast, the single application of fires caused a marked increase of SOM, N, P and K contents in both surface and subsurface soils but had little impacts on soil nutrient distributions. Soils under all the three conditions showed a relative increase of soil nutrients at riverbank foot. This comparative study indicated that the different or even contrary effects of riverbank management practices on soil nutrient statuses should be carefully taken into account when assessing the ecological effects of management practices.