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| Guadagnin,Jean Cláudio; Bertol,Ildegardis; Cassol,Paulo Cezar; Amaral,André Júlio do. |
| As perdas de nutrientes são influenciadas pelo sistema de manejo do solo. Em geral, as concentrações de nutrientes na enxurrada são maiores nos sistemas conservacionistas de manejo de solo, enquanto as perdas totais de nutrientes são maiores nos sistemas convencionais. Determinaram-se, sob condições de chuva natural, as perdas de NH4+ e NO3- na água e de N mineral no sedimento da enxurrada, nos seguintes sistemas de manejo do solo: semeadura direta com seis anos de cultivo (SD6), semeadura direta com nove anos de cultivo (SD9), uma escarificação + uma gradagem com nove anos de cultivo (E+G9), uma aração + duas gradagens com nove anos de cultivo (A+2G9) e uma aração + duas gradagens sem cultivo por nove anos (SSC9), cultivados no sentido paralelo ao... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Perdas de nutrientes; Sedimento; Enxurrada. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832005000200013 |
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| Bertol,Ildegardis; Mello,Eloy Lemos; Guadagnin,Jean Cláudio; Zaparolli,Almir Luis Vedana; Carrafa,Marcos Roberto. |
| Water erosion causes soil degradation, which is closely related to nutrient losses either in, the soluble form or adsorbed to soil particles, depending mainly on the adopted soil management system. This study was carried out in São José do Cerrito, SC, Brazil, between March 2000 and June 2001. The objective was to quantify available nitrogen, phosphorus, potassium, calcium and magnesium losses in water erosion obtained with simulated rainfall in the following soil management systems: conventional tillage with no-crop (bare soil) (BS), conventional tillage with soybean (CT), reduced tillage with soybean (RT), no tillage with soybean on a desiccated and burned natural pasture (DBNP), and no tillage with soybean on a desiccated natural pasture (DNP). A... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrient concentration; Water loss; Simulated rainfall. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000300025 |
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| Bertol,Ildegardis; Guadagnin,Jean Cláudio; González,Antonio Paz; Amaral,André Júlio do; Brignoni,Leonardo Felipe. |
| Soil tillage influences water erosion, and consequently, losses of calcium, magnesium and organic carbon in surface runoff. Nutrients and organic carbon are transported by surface runoff in particulate form, adsorbed to soil colloids or soluble in water, depending on the soil tillage system. This study was carried out on an Inceptisol, representative of the Santa Catarina highlands, southern Brazil, between November 1999 and October 2001, under natural rainfall. The soil tillage treatments (no replications) were: no-tillage (NT), minimum soil tillage with chiseling + disking (MT), and conventional soil tillage with plowing + two diskings (CT). The crop cycles sequence was soybean (Glycine max), oats (Avena sativa), beans (Phaseolus vulgaris) and vetch... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Runoff; Sediment; Nutrient in runoff; Nutrient in sediments; Nutrient losses. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000600011 |
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