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| Sampaio,Silvio César; Corrêa,Marcus Metri; Vilas Bôas,Márcio Antônio; Oliveira,Luiz Fernando Coutinho de. |
| A determinação da precipitação efetiva apresenta grande relevância no estudo da precipitação com fins de aplicação na agricultura, visto que esta parcela da precipitação é realmente aquela que estará contribuindo com a água disponível do solo. Em conseqüência, sua quantificação é de grande utilidade nas irrigações suplementares, levando o irrigante a alcançar expressiva economia na condução da irrigação. O objetivo deste trabalho foi realizar um estudo de chuva efetiva mensal, utilizando-se as precipitações prováveis mensais estimadas por meio da distribuição Log-Normal, com dados observados junto à estação climatológica da Universidade Federal de Lavras, no período de 1914 a 1991, para o município de Lavras, MG. Foram utilizados os seguintes métodos para... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hidrologia; Chuva efetiva; Distribuição log-normal. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662000000200013 |
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| Smanhotto,Adriana; Sampaio,Silvio César; Bosco,Tatiane Cristina Dal; Prior,Maritane; Soncela,Rosimaldo. |
| This study aimed at evaluating the effects of pig slurry application with mineral fertilizer on ions leaching from the soil in soybean crop. The experiment was carried out in 24 drainage lysimeters under protection. The soybean cultivar CD 202/COODETEC was sown in a soil that received 0, 100, 200 and 300 m³ha-1of pig slurry in one cycle, with or without mineral fertilizer. There were three samplings of soil throughout the trial to determine the pH, N, NO3-, K+, Ca2+, Mg2+, Na+, Cu+2, Zn+2, OM, CEC, EC and SAR six times during the crop cycle. The yield was determined in the plants. In soil, pig slurry increased the concentrations of pH, NO3-, K+, Zn+2, OM and CEC, while mineral fertilizer increased P and Zn+2concentrations. The limits observed for the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Organic fertilization; Soil pollution; Environment contamination; Soybean culture. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000500003 |
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| Prior,Maritane; Sampaio,Silvio César; Nóbrega,Lúcia Helena Pereira; Opazo,Miguel Angel Uribe; Dieter,Jonhatan; Pegoraro,Thaisa. |
| The objective of this work was to evaluate the environmental effects of the use of pig slurry to irrigate the corn crop grown in a typical Red Distroferric Latosol and in leachate composition. Twenty four lysimeters, filled with soil, in a protected environment, received five doses of pig slurry (0; 112.5; 225; 337.5 and 450 m³ ha-1 per growing cycle) combined with two mineral fertilization doses (50 and 75% of the recommended dose - 80 kg ha-1of nitrogen). Corn height and yield were evaluated, as well as nutrients in the soil and in leachate. From the results obtained in the first year of experiment, it was concluded that the concentrations of nitrate increased by increase of pig slurry application, and thus, it would be necessary to develop further... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrate leaching; Nutrients cycling; Zea mays L. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200020 |
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| Tessaro,Dinéia; Sampaio,Silvio César; Castaldelli,Ana Paula Almeida. |
| ABSTRACT: The use of wastewater in agriculture has been practiced on an increasing scale over the past decades because of its fertilizing potential and the reduction in demand for surface water and groundwater. However, this practice may bring harm when performed without planning, not respecting the capacity of the soil to recycle organic waste. The most common problems are contamination of surface and groundwater via leaching and runoff, as well as accumulation of nutrients and potentially polluting elements that compromise chemical, physical and biological characteristics of the soil. The biological compartment, represented by the micro, meso and macrofauna, plays an important role in nutrient cycling, decomposition of organic matter, particle movement... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil biology; Edaphic fauna; Waste water.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000600976 |
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