Long-term Effects of Grazing Management and Buffer Strips on Soil Erosion from Pastures
| Autor: | Philip A. Moore, Daniel H. Pote, Randy L. Raper, J. Lee, David K. Brauer, Cristiane Pilon, Jerry W. Martin, J. H. Pennington, S. M. Dabney |
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| Rok vydání: | 2017 |
| Předmět: |
Conservation of Natural Resources
Environmental Engineering Riparian buffer Buffer strip 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Pasture Grazing pressure Soil Grazing Water Movements Animals Water Pollutants Animal Husbandry Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology geography geography.geographical_feature_category 04 agricultural and veterinary sciences Pollution Manure Universal Soil Loss Equation Agronomy Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Cattle Surface runoff Chickens |
| Zdroj: | Journal of Environmental Quality. 46:364-372 |
| ISSN: | 0047-2425 |
| DOI: | 10.2134/jeq2016.09.0378 |
| Popis: | High grazing pressure can lead to soil erosion in pastures, causing increased sediment delivery to waterways. The objectives of this research were to evaluate the impact of grazing management and buffer strips on soil erosion by assessing soil physical properties, hydrology, and sediment loads from pastures fertilized with broiler litter. Field studies were conducted for 12 yr on 15 small watersheds. Five management strategies were evaluated: hayed (H), continuously grazed (CG), rotationally grazed (R), rotationally grazed with a buffer strip (RB), and rotationally grazed with a fenced riparian buffer (RBR). Broiler litter was applied every year at a rate of 5.6 Mg ha. Bulk density and penetration resistance were highest for CG watersheds. Runoff volumes, sediment concentrations, and loads were lowest for the H and RBR treatments and highest for CG. Average runoff amounts were 48, 84, 77, 60, and 81 mm yr for the H, R, RB, RBR, and CG treatments, respectively. Annual average sediment loads were 25, 30, 58, 71, and 110 kg ha for H, RBR, R, RB, and CG, respectively. The Revised Universal Soil Loss Equation, Version 2 was reasonably effective at predicting soil loss for the R, RB, and RBR treatments, but it greatly overpredicted soil loss from the CG and H treatments. Converting a pasture to a hay field or using rotational grazing in conjunction with a fenced riparian buffer appear to be effective options for reducing soil erosion and runoff to waterways from pasture soils. |
| Databáze: | OpenAIRE |
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