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Alves,Ana Carolina; Oliveira,Patrícia Perondi Anchão; Herling,Valdo Rodrigues; Trivelin,Paulo Cesar Ocheuze; Luz,Pedro Henrique de Cerqueira; Alves,Teresa Cristina; Rochetti,Ramon Cellin; Barioni Júnior,Waldomiro. |
Gaseous N losses from soil are considerable, resulting mostly from ammonia volatilization linked to agricultural activities such as pasture fertilization. The use of simple and accessible measurement methods of such losses is fundamental in the evaluation of the N cycle in agricultural systems. The purpose of this study was to evaluate quantification methods of NH3 volatilization from fertilized surface soil with urea, with minimal influence on the volatilization processes. The greenhouse experiment was arranged in a completely randomized design with 13 treatments and five replications, with the following treatments: (1) Polyurethane foam (density 20 kg m-3) with phosphoric acid solution absorber (foam absorber), installed 1, 5, 10 and 20 cm above the soil... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilizer-N; Ammonia absorber; 15N; NH3-N loss. |
Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000100012 |
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Alves,Teresa Cristina; Franzolin,Raul; Rodrigues,Paulo Henrique Mazza; Alves,Ana Carolina. |
Avaliaram-se os efeitos de dietas com níveis crescentes de milho em grão moído (0, 22, 37 e 49% na MS) em substituição ao feno de coast-cross mantendo-se diferentes relações proteína:carboidratos não-fibrosos (PB:CNF = 1,01; 0,39; 0,33 e 0,27) sobre o metabolismo ruminal de búfalos. Utilizaram-se quatro búfalos fistulados no rúmen, mantidos em delineamento quadrado latino 4 × 4, para a coleta de amostras do líquido ruminal, colhidas em cada período experimental (de 28 dias) nos tempos 0, 2, 4 e 8 horas após a alimentação. Em geral, os bubalinos apresentaram boa capacidade tamponante no rúmen, com pH médio alto (6,70) e aumento da ingestão de milho em grão moído. O acréscimo nos níveis de milho na dieta promoveu aumento da produção de ácido butírico.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ácidos graxos voláteis; Amônia; Búfalo; Carboidrato; PH rúmen; Rúmen. |
Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001000021 |
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Alves,Ana Carolina; Alves,Nadja Gomes; Ascari,Ivan Júnior; Junqueira,Felipe Barbosa; Maciel,Luciana França Smith; Garcia,Iraides Ferreira Furusho; Lima,Renato Ribeiro. |
ABSTRACT The objective of this study was to examine the effects of suckling schemes (continued, controlled, and total separation) and the type of pregnancy on performance and serum cortisol concentration in lambs. A total of 29 Santa Inês ewes and 40 lambs were used, and the randomized block design was applied in a split-plot scheme with a 3 × 2 factorial arrangement in the plot and time in the subplot. For controlled suckling, the diet was supplied twice daily during one hour, starting on their 10th day of life. Total and average daily intakes of concentrate dry matter of lambs that underwent total separation was higher than those of lambs under continued suckling. Lambs subjected to total separation demonstrated higher concentrate dry matter... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artificial suckling; Concentrate intake; Controlled suckling; Weight gain. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000900546 |
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