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Digestibility of the cottonseed meal with or without addition of protease and phytase enzymes in swine diet - doi: 10.4025/actascianimsci.v34i3.12360 Animal Sciences
Lorena-Rezende, Izaura Maria Barros de; Universidade Federal Rural de Pernambuco; Dutra Junior, Wilson Moreira; Universidade Federal Rural de Pernambuco; Rezende, Fabio Monteiro; Universidade Federal Rural de Pernambuco; Palhares, Liliane Olimpio; Universidade Federal Rural de Pernambuco; Ludke, Maria do Carmo Mouhaupt Marques; Universidade Federal Rural de Pernambuco; Rabello, Carlos Boa-Viagem; Universidade Federal Rural de Pernambuco.
This study evaluated the digestibility of cottonseed meal with or without addition of enzymes (phytase and protease) for growing pigs. It was used 18 barrows, housed in metabolism cages, distributed in a completely randomized design, standardizing body weight (bw) with average of 25.8 ± 3.6 kg, with three treatments and six repetitions. The treatments consisted of a reference diet based on corn and soybean meal, the second treatment with replacement of 30% of the reference diet by cottonseed meal without enzymes, and the third with 30% of the reference diet replaced by cottonseed meal with added enzymes. Was determined the digestible protein, digestible energy, digestibility of dry matter, energy and protein. It was also registered the balance of nitrogen...
Tipo: Pesquisa de campo Palavras-chave: Nutrição Animal alternative food; Exogenous enzymes; Metabolism; Non-ruminants.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/12360
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Disaggregate Productivity Growth in Livestock Production: A Directional Malmquist Index Approach AgEcon
Ludena, Carlos E.; Hertel, Thomas W.; Preckel, Paul V.; Foster, Kenneth A.; Nin Pratt, Alejandro.
Limited data on the allocation of inputs to different activities has limited agricultural economists' attempts to measure sub-sector productivity growth in agriculture. However, recent developments have enabled us to estimate total factor productivity (TFP) growth for crops and livestock accounting for input-output allocation. This paper extends previous work on TFP measurement for livestock into ruminants and non-ruminant productivity measurement, given the differences in productivity growth rates among these species. The results show that the non-ruminant sector is more dynamic than the ruminant sector, driving most of the productivity growth within the livestock sector. Given the rapid rates of productivity growth observed recently, non-ruminant...
Tipo: Conference Paper or Presentation Palavras-chave: Total factor productivity; Malmquist index; Livestock; Ruminants; Non-ruminants; Productivity Analysis; O47; O57; Q16.
Ano: 2005 URL: http://purl.umn.edu/19395
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