Journal Title
Title of Journal: Nutr Cycl Agroecosyst
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Abbravation: Nutrient Cycling in Agroecosystems
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Publisher
Springer Netherlands
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Authors: Gebreyesus Brhane Tesfahunegn Paul L G Vlek Lulseged Tamene
Publish Date: 2012/02/14
Volume: 92, Issue: 3, Pages: 255-272
Abstract
Soil degradation by erosion is the most serious threat to food security in Ethiopia Thus effective management strategies scenarios that reduce soil degradation are crucial However the application of models such as Soil and Water Assessment Tool SWAT that simulate the impact of different scenarios on soil degradation by erosion in Ethiopia condition is limited This study is aimed to evaluate the effectiveness of different scenarios in reducing runoff sediment and soil nutrients losses using the SWAT model for the MaiNegus catchment northern Ethiopia The highest erosion in terms of runoff sediment yield total nitrogen TN and phosphorus TP losses was simulated by the baseline scenario at the catchment outlet as 168 mm 42000 t year−1 22400 and 1360 kg year−1 respectively In contrast the lowest runoff sediment yield TN and TP losses were simulated by the scenario that integrated landuse redesign and conservation measures scenario 6c at catchmen level as 50 mm 9215 t year−1 6284 and 341 kg year−1 respectively These indicate that reduction of sediment TP TN and runoff losses by 78 75 72 and 70 respectively can be achieved by scenario 6c compared to the baseline scenario Thus scenario 6c appears relatively more effective as potential management strategy in reducing soil degradation than the other scenarios This study demonstrates that SWAT model is powerful to select the most technically effective management strategies in reducing soil degradation in a catchment However further research is required related to the costbenefits of such management strategiesThe authors sincerely acknowledge the financial support by DAAD/GTZ Germany through the Center for Development Research ZEF University of Bonn Germany and field work supported by Aksum University Ethiopia The authors highly appreciate the assistance offered by the local farmers administration and extension agents during the study
Keywords:
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Other Papers In This Journal:
- Amending soil with used cooking oil to reduce nitrogen losses after cole crop harvest: a 15 N study
- Effects of fertiliser type and the presence or absence of plants on nitrous oxide emissions from irrigated soils
- Relative contribution of trees and crops to soil carbon content in a parkland system in Burkina Faso using variations in natural 13 C abundance
- Shrubs affect soil nutrients availability with contrasting consequences for pasture understory and tree overstory production and nutrient status in Mediterranean grazed open woodlands
- Forecasting long-term global fertilizer demand
- 15 N tracer technique analysis of the absorption and utilisation of nitrogen fertiliser by potatoes
- Nitrogen, phosphorus, and potassium budgets in Indian agriculture
- Effects of different manuring systems with and without biogas digestion on nitrogen cycle and crop yield in mixed organic dairy farming systems
- Crop response of aerobic rice and winter wheat to nitrogen, phosphorus and potassium in a double cropping system
- Net N immobilisation during the biodegradation of mucilage in soil as affected by repeated mineral and organic fertilisation
- Phosphorus and potassium cycling in a long-term no-till integrated soybean-beef cattle production system under different grazing intensities insubtropics
- Contribution of relay intercropping with legume cover crops on nitrogen dynamics in organic grain systems
- Method and timing of grassland renovation affects herbage yield, nitrate leaching, and nitrous oxide emission in intensively managed grasslands
- Mineralizable soil nitrogen and labile soil organic matter in diverse long-term cropping systems
- Accumulation of phosphorus fractions in typic Hapludalf soil after long-term application of pig slurry and deep pig litter in a no-tillage system
- Soil N 2 O fluxes in integrated production systems, continuous pasture and Cerrado
- Comparative short-term effects of different quality organic resources on maize productivity under two different environments in Zimbabwe
- Gross nitrogen mineralization in pulse-crop rotations on the Northern Great Plains
- Millet nutrient use efficiency as affected by natural soil fertility, mineral fertilizer use and rainfall in the West African Sahel
- Nitrogen fertilization and critical nitrogen concentration for contemporary high yielding cotton under no-tillage
- Effects of catch crops on silage maize ( Zea mays L.): yield, nitrogen uptake efficiency and losses
- Nitrogen input, 15 N balance and mineral N dynamics in a rice–wheat rotation in southwest China
- Nutrient cycling in an agroforestry alley cropping system receiving poultry litter or nitrogen fertilizer
- How much nitrogen is fixed by biological symbiosis in tropical dry forests? 2. Herbs
- Nitrogen fertilizer placement and timing affects bread wheat ( Triticum aestivum) quality and yield in an irrigated bed planting system
- Nitrogen fixation of red clover interseeded with winter cereals across a management-induced fertility gradient
- Response of bulk chemical composition, lignin and carbohydrate signature to grassland conversion in a ley-arable cropping system
- Nitrogen recovery and downslope translocation in maize hillside cropping as affected by soil conservation
- Effect of seasonal rainfall, N fertilizer and tillage on N utilization by dryland wheat in a semi-arid environment
- Long-term effects of fertilization and manuring on groundnut yield and nutrient balance of Alfisols under rainfed farming in India
- Response of intensively grazed ryegrass dairy pastures to fertiliser phosphorus and potassium
- Effect of seasonal rainfall, N fertilizer and tillage on N utilization by dryland wheat in a semi-arid environment
- Above- and belowground litter stocks and decay at a multi-species afforestation site on arid, saline soil
- Productivity of yam-based systems with herbaceous legumes and short fallows in the Guinea-Sudan transition zone of Benin
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