The Contribution of Conservation Practices in Reducing Runoff, Soil Loss, and Transport of Nutrients at the Watershed Level

Rocha, Everton Oliveira; Calijuri, Maria Lúcia; Santiago, Aníbal da Fonseca; Assis, Leonardo Campos de; Alves, Luna Gripp Simões

doi:10.1007/s11269-012-0106-1

Cited by 31 publications

(21 citation statements)

References 43 publications

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“…Similar results were obtained by Aita et al (2006), who observed an increase of 104 % in oat DM production with the application of 80 m 3 ha -1 of PS. The presence of cover plants in rotation with commercial crops is very important because it means greater nutrient cycling (Rocha et al, 2012). In ( Table 3.…”

Section: Resultsmentioning

confidence: 99%

Pig slurry and nutrient accumulation and dry matter and grain yield in various crops

Lourenzi

Ceretta

Brunetto

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYPig slurry (PS) represents an important nutrient source for plants and using it as fertilizer makes greater nutrient cycling in the environment possible. The aim of this study was to assess how PS application over a period of years can affect grain yield, dry matter production and nutrient accumulation in commercial grain and cover crops. The experiment was carried out in an experimental area of the Universidade Federal de Santa Maria, in Santa Maria, RS, Brazil, from May 2000 to January 2008. In this period, 19 grain and cover crops were grown with PS application before sowing, at rates of 0, 20, 40 and 80 m 3 ha -1 . The highest PS rate led to an increase in nutrient availability over the years, notably of P, but also of nutrients that are potentially toxic to plants, especially Cu and Zn. The apparent recovery of nutrients by commercial grain and cover crops decreased with the increasing number of PS applications to the soil. Accumulated dry matter production of the crops and maize grain yield were highest at an annual application rate of 80 m 3 ha -1 PS. However, common bean yield increased up to 20 m 3 ha -1 PS, showing that the crop to be grown should be considered to define the application rate.

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Section: Resultsmentioning

confidence: 99%

Pig slurry and nutrient accumulation and dry matter and grain yield in various crops

Lourenzi

Ceretta

Brunetto

et al. 2014

Rev. Bras. Ciênc. Solo

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“…The simulated results showed a mean annual runoff (R) of 35 mm, mean annual sediment yield (SY) of 51 t ha -1 y -1 , 3.6 t ha -1 y -1 loss of total nitrogen (TN) and 1.6 t ha -1 year -1 loss of total phosphorus (TP). After taking into account conservation practices, the results showed an increase in water infiltration, reducing R, SY, TN and TP by 18, 66, 25 and 30%, respectively (Rocha et al, 2012).…”

Section: Soil Erosion and Conservation In Brazilmentioning

confidence: 98%

“…For instance, SWAT (Soil and Water Assessment Tool) has been used to develop conservation practises to reduce runoff, soil loss and nutrient losses in São Bartolomeu drainage basin, Viçosa Municipality, in Minas Gerais State (Rocha et al, 2012). The model allowed the identification of critical areas in terms of runoff generation, sediment yield and nutrient loss.…”

Section: Soil Erosion and Conservation In Brazilmentioning

confidence: 99%

Erosão e Conservação de Solos no Brasil

et al. 2014

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“…Some improvement in the quality of surface waters was obtained upon lowering nitrate surpluses in agriculture in developed countries (Kumazawa 2002;Oenema et al 2005). Excessive rain or irrigation can increases the groundwater free surface level and its vulnerability to nitrate pollution (Nolan et al 2006) while environmental conservation practices can reduce runoff and transport of nutrients at the watershed level (Rocha et al 2012).…”

Section: Introductionmentioning

confidence: 99%

A Coupled Mathematical Model to Predict the Influence of Nitrogen Fertilization on Crop, Soil and Groundwater Quality

Marinov

Marinov²

2014

Water Resour Manage

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Intensified use of nitrogen based fertilizers in agriculture has resulted in a significant increases in soils and groundwater nitrate concentrations all over the world. Here we propose a new coupled model which describes the physical transport and biogeochemical dynamics of the water and nitrogen compounds in a soil-water-plant-groundwater system. Our model takes into account water infiltration into an unsaturated porous medium, the complex biogeochemical cycle of nitrogen in soils, nitrate leaching from the agricultural system toward the aquifer's water table, and the dispersion of nitrates in the groundwater. We calibrate our model and analyse the influence of soil type, precipitation or irrigation regime and fertilization schedules on leaching to groundwater as well as the temporal and spatial evolution of the nitrate pollutant plume in the aquifer. Simulations indicate that in order to achieve high crop yields while minimizing nitrogen loading to soils and groundwater we need to create an optimal balance between the amount of chemical fertilizers and water applied to crops on one hand, and the amount of nitrate and water used by plants on the other. We find that medium soils are more suitable for a sustainable corn production than coarse soils, ensuring both higher yield and less nitrate pollution of the aquifer. Regardless of soil type and irrigation schedule, a gradual fertilization throughout the plant life cycle reduces the potential for leaching and aquifer pollution. For medium soils, a more modest irrigation schedule results in more nitrate available for crops and less net leaching to the groundwater.

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The Contribution of Conservation Practices in Reducing Runoff, Soil Loss, and Transport of Nutrients at the Watershed Level

Cited by 31 publications

References 43 publications

Pig slurry and nutrient accumulation and dry matter and grain yield in various crops

Pig slurry and nutrient accumulation and dry matter and grain yield in various crops

Erosão e Conservação de Solos no Brasil

A Coupled Mathematical Model to Predict the Influence of Nitrogen Fertilization on Crop, Soil and Groundwater Quality

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