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Composition of Poultry Litter in Southern Brazil Rev. Bras. Ciênc. Solo
Rogeri,Douglas Antonio; Ernani,Paulo Roberto; Mantovani,Analú; Lourenço,Kesia Silva.
ABSTRACT Determining the chemical composition of poultry litter is important in order to apply this waste as soil fertilizer without causing negative environmental impacts. The aim of this study was to evaluate the average and variability of some chemical parameters of 165 samples of poultry litter produced from confined animal production facilities located in the states of Santa Catarina and Rio Grande do Sul, Southern of Brazil. Samples of approximately 5.0 L were collected on 20 points from the truck at the time the material was unloaded into the application sites. Subsequently, they were oven-dried at 65 °C and analyzed. Values of pH in water, dry matter, N, P and K were determined in all samples; N soluble in water (soluble-N), ammonium (NH+4-N) and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal waste; Fertilizer; Organic nitrogen.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100525
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Preharvest calcium sprays were not always needed to improve quality of 'gala' apples in Brazil Rev. Bras. Frutic.
Ernani,Paulo Roberto; Dias,Jaques; Amarante,Cassandro Vidal Talamini do; Ribeiro,Diorvânia Cardoso; Rogeri,Douglas Antonio.
Calcium sprays have normally improved both the quality and the storage life of apples throughout the world because Ca helps to prevent many fruit disorders and that taken up from the soil does not often reach the fruit in adequate amounts. Since the efficacy of Ca sprays varies according to soil, apple cultivar, and weather conditions, this study was carried out from 1998 to 2004, in the Southern of Brazil, in order to assess the effect of Ca sprays on the quality and storability of 'Gala' fruits. The experiment was set up in an orchard planted in 1988, on a density of 1234 trees/ha. Treatments consisted of 0, 4, 8, and 12 annual sprays of 0.5% CaCl2 regularly distributed 30 days after petal fall until one week before harvest. Fruits of the same size and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Malus domestica; Nutrition; Bitter pit; Lenticel blotch pit; Calcium chloride.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452008000400009
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Remaining phosphorus content to determine phosphorus availability of the soils in Rio Grande do Sul PAB
Rogeri,Douglas Antonio; Bortolon,Leandro; Gianello,Clesio; Amorim,Magno Batista.
Abstract: The objective of this work was to evaluate remaining P compared with soil clay content as a P buffer index to classify P extracted by the Mehlich-1 (M1) and Mehlich-3 (M3) methods in soils from the state of Rio Grande do Sul, Brazil. The experiment was carried out in a completely randomized design with five P2O5 rates (0, 50, 100, 200, and 400 mg kg-1) and two sucessive corn crops, and three replicates, in 20 representative soils of the state. P extracted by M1 and M3 before crop planting was adjusted to P contents in biomass, considering soil buffer capacity. The division of soils into different buffering classes, based on soil clay or remaining P, improved the capacity of estimating soil available P of both methods. However, there was no...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Clay content; Phosphate buffer capacity; Phosphate fertilization; Phosphorus adsorption; Soil test.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201203
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Substitution of Clay Content for P-Remaining as an Index of the Phosphorus Buffering Capacity for Soils of Rio Grande do Sul Rev. Bras. Ciênc. Solo
Rogeri,Douglas Antonio; Gianello,Clesio; Bortolon,Leandro; Amorim,Magno Batista.
ABSTRACT Mehlich-1 soil extract is currently used in Rio Grande do Sul (RS) and Santa Catarina (SC) States, in Brazil, to evaluate soil phosphorus available to plants and Mehlich-1 is sensitive to soil buffering capacity. This limitation is overcome partly by soil separation into buffering classes based on soil clay content. However, soil clay content has some technical and operational limitations, such as the underestimation of soil clay levels in soils under no-till. The aim of this study was to evaluate the remaining phosphorus (P-rem) compared to soil clay content as an index of the buffering capacity in soils of RS. The relationship between P-rem and soil clay content was assessed using 200 soil samples from a wide range of locations across the state....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mehlich-1; Mehlich-3; Phosphate fertilization; Phosphorus adsorption.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100418
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Volatilização de amônia do solo após a aplicação de ureia convencional ou com inibidor de urease Rev. Bras. Ciênc. Solo
Tasca,Francis Alex; Ernani,Paulo Roberto; Rogeri,Douglas Antonio; Gatiboni,Luciano Colpo; Cassol,Paulo Cézar.
Volatilização de NH3 é a principal reação que diminui a eficiência de utilização pelas plantas do N proveniente da ureia, quando ela é aplicada sobre a superfície do solo. A fim de minimizar essa perda, produtos têm sido misturados à ureia para inibir temporariamente a ação da urease. Este trabalho objetivou avaliar alternativas de aplicação de um fertilizante com inibidor de urease, visando a diminuir a volatilização de NH3 relativamente à ureia convencional, em algumas condições ambientais e de solo. Foram desenvolvidos quatro experimentos, todos em condições de laboratório, em 2007 e 2008, em Cambissolo Húmico. Os tratamentos variaram em cada estudo e incluíram combinações de níveis de pH do solo (natural; 5,5; 6,3; e 6,8), umidade do solo (5, 10 ou 20...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Temperatura; PH; Formas de aplicação de adubos; Fertilizantes nitrogenados.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000200018
Registros recuperados: 5
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