Abstract:
:The distribution of soil particle sizes is closely related to soil health condition. In this study, grasslands under different grazing intensities and different cultivation ages grasslands were selected to evaluate the dynamics of soil particle size redistribution in different soil layers. When the grazing intensity increased, the percentage of 2000~150-μm soil particles in the 0-10-cm soil layer decreased; 150~53-μm soil particles remained relatively stable among the grazing intensities-approximately 28.52%~35.39%. However, the percentage of less than 53-μm soil particles increased. In cultivated grasslands, the larger sizes (>53 μm) of soil particles increased and the smaller sizes (<53 μm) decreased significantly (p < 0.05) in the 0-10 cm-soil layer with increasing cultivation ages. The increase in small soil particles (<53 μm) in topsoil associated with grazing intensity increased the potential risk of further degradation by wind erosion. The increase in big soil particles (>53 μm) in topsoil associated with cultivation ages decreased the soil capacity of holding water and nutrient. Therefore, to maintain the sustainability of grassland uses, grazing grasslands need to avoid heavy grazing, and cultivated grasslands need to change current cultivation practices.
journal_name
Int J Environ Res Public Healthauthors
Li J,Shang J,Huang D,Tang S,Zhao T,Yang X,Zhang Q,Liu K,Shao Xdoi
10.3390/ijerph16152639subject
Has Abstractpub_date
2019-07-24 00:00:00issue
15eissn
1661-7827issn
1660-4601pii
ijerph16152639journal_volume
16pub_type
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