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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sul. |
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Data corrente: |
07/12/2020 |
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Data da última atualização: |
07/12/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CARDOSO, L. L.; TAROUCO, J. U.; MACNEIL, M. D.; LOBATO, J. F. P.; DAMBRÓS, M. C.; FREITAS, A. K. de; DEVICENZI, T.; FEIJÓ, F. D.; CARDOSO, F. F. |
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Afiliação: |
Leandro Lunardini Cardoso, UFRGS; Jaime Urdapilleta Tarouco, UFRGS; Michael D. MacNeil, DELTA G; José Fernando Piva Lobato, UFRGS; Mara Célia Dambrós, USP; Aline Kellermann de Freitas, UFRGS; Thais Devincenzi, UFRGS; Fernanda Dorneles Feijó, UFRGS; FERNANDO FLORES CARDOSO, CPPSUL. |
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Título: |
Sample size and prediction of weight and yield of individual cuts from Braford steers pistol hindquarters. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Scientia Agricola, v. 77, n. 4, e20180224, 2020. |
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ISSN: |
1678-992X |
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DOI: |
http://dx.doi.org/10.1590/1678-992X-2018-0224 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT: Two hundred seventeen grass-finished Braford steers were assessed by ultrasonic scanning and subsequently harvested with their pistol hindquarters fabricated into boneless wholesale cuts. The Longissimus thoracis muscle area and subcutaneous fat depths were measured. The objectives of this study were: 1) to develop prediction equations for weights of the pistol hindquarter and high-value commercial cuts, and 2) to estimate sample size needed for experiments comparing pistol hindquarter retail product weight using either physically or ultrasonically measured carcass traits. Carcass measurements explained 44 % to 94 % of the variation in weights of individual cuts, whereas, measurements that were made using ultrasound explained 42 % to 90 % of the variation in the weights. Models used to predict the weight of pistol hindquarter retail product with carcass measures and ultrasound measures showed high coefficient of determination (R2 = 0.92 and 0.97, respectively). Whether based on carcass or ultrasound measures, models used to estimate weight percentage of fat trimmed from the pistol hindquarter had lack of fit. In general, models for individual cuts weights that used traits measured with ultrasound as independent variables approached the accuracy of models using carcass traits. Thus, only slightly greater samples sizes were required to have equivalent power to detect differences in retail product weights using ultrasound measures. For experiments of equivalent power, differences in the number of animals required may be offset by avoiding costs for slaughter and fabrication. Keywords: cattle, carcass, models, ultrasound MenosABSTRACT: Two hundred seventeen grass-finished Braford steers were assessed by ultrasonic scanning and subsequently harvested with their pistol hindquarters fabricated into boneless wholesale cuts. The Longissimus thoracis muscle area and subcutaneous fat depths were measured. The objectives of this study were: 1) to develop prediction equations for weights of the pistol hindquarter and high-value commercial cuts, and 2) to estimate sample size needed for experiments comparing pistol hindquarter retail product weight using either physically or ultrasonically measured carcass traits. Carcass measurements explained 44 % to 94 % of the variation in weights of individual cuts, whereas, measurements that were made using ultrasound explained 42 % to 90 % of the variation in the weights. Models used to predict the weight of pistol hindquarter retail product with carcass measures and ultrasound measures showed high coefficient of determination (R2 = 0.92 and 0.97, respectively). Whether based on carcass or ultrasound measures, models used to estimate weight percentage of fat trimmed from the pistol hindquarter had lack of fit. In general, models for individual cuts weights that used traits measured with ultrasound as independent variables approached the accuracy of models using carcass traits. Thus, only slightly greater samples sizes were required to have equivalent power to detect differences in retail product weights using ultrasound measures. For experiments of equivalent power,... Mostrar Tudo |
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Thesagro: |
Bovino; Carcaça; Ultrassom. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/218803/1/Cardoso-et-al-2020.pdf
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Marc: |
LEADER 02475naa a2200277 a 4500
001 2127710
005 2020-12-07
008 2020 bl uuuu u00u1 u #d
022 $a1678-992X
024 7 $ahttp://dx.doi.org/10.1590/1678-992X-2018-0224$2DOI
100 1 $aCARDOSO, L. L.
245 $aSample size and prediction of weight and yield of individual cuts from Braford steers pistol hindquarters.$h[electronic resource]
260 $c2020
520 $aABSTRACT: Two hundred seventeen grass-finished Braford steers were assessed by ultrasonic scanning and subsequently harvested with their pistol hindquarters fabricated into boneless wholesale cuts. The Longissimus thoracis muscle area and subcutaneous fat depths were measured. The objectives of this study were: 1) to develop prediction equations for weights of the pistol hindquarter and high-value commercial cuts, and 2) to estimate sample size needed for experiments comparing pistol hindquarter retail product weight using either physically or ultrasonically measured carcass traits. Carcass measurements explained 44 % to 94 % of the variation in weights of individual cuts, whereas, measurements that were made using ultrasound explained 42 % to 90 % of the variation in the weights. Models used to predict the weight of pistol hindquarter retail product with carcass measures and ultrasound measures showed high coefficient of determination (R2 = 0.92 and 0.97, respectively). Whether based on carcass or ultrasound measures, models used to estimate weight percentage of fat trimmed from the pistol hindquarter had lack of fit. In general, models for individual cuts weights that used traits measured with ultrasound as independent variables approached the accuracy of models using carcass traits. Thus, only slightly greater samples sizes were required to have equivalent power to detect differences in retail product weights using ultrasound measures. For experiments of equivalent power, differences in the number of animals required may be offset by avoiding costs for slaughter and fabrication. Keywords: cattle, carcass, models, ultrasound
650 $aBovino
650 $aCarcaça
650 $aUltrassom
700 1 $aTAROUCO, J. U.
700 1 $aMACNEIL, M. D.
700 1 $aLOBATO, J. F. P.
700 1 $aDAMBRÓS, M. C.
700 1 $aFREITAS, A. K. de
700 1 $aDEVICENZI, T.
700 1 $aFEIJÓ, F. D.
700 1 $aCARDOSO, F. F.
773 $tScientia Agricola$gv. 77, n. 4, e20180224, 2020.
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Registro original: |
Embrapa Pecuária Sul (CPPSUL) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
26/04/1993 |
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Data da última atualização: |
26/04/1993 |
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Autoria: |
RITCHEY, K. D. |
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Título: |
Potassium fertility in oxisols and ultisols of the humid tropics. |
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Ano de publicação: |
1979 |
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Fonte/Imprenta: |
Ithaca, N.Y.: Cornell University, 1979. |
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Páginas: |
44p. |
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Série: |
(Cornell International Agriculture. Bulletin, 37). |
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Idioma: |
Inglês |
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Conteúdo: |
It is possible to study the fate of potassium fertilizer in highly weathered acid soils of the tropics because low amounts of potassium-fixing and potassium-releasing minerals are present. Potassium that is not leached or removed from the field in harvested material remains available on the soil exchange complex. On a Dark Red Latosol in Central Brazil, leaching began to occur only with the addition of 300 kg/ha K as KCl, which is well above the recommemded rate. The potassium content measured in grain crops varied with K status of the soil, from 1,4 percent to 1.9 percent in soybean and 0.23 percent to 0.39 percent in maize. The amount of K that will be exported from the field as grain is easily calculated, and at least this amount of K must be returned to the soil yearly in order to maintain production. If the stover is also removed, its K content should be taken into account as well. Forages removed from the field may contain 1 percent to 3 percent K on a dry-mattrer basis(...) |
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Palavras-Chave: |
Brasil; Latossolo vermelho-escuro; Regiao Central. |
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Thesagro: |
Adubação; Cerrado; Fertilidade do Solo; Lixiviação; Potássio. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01628nam a2200229 a 4500
001 1548450
005 1993-04-26
008 1979 bl uuuu u0uu1 u #d
100 1 $aRITCHEY, K. D.
245 $aPotassium fertility in oxisols and ultisols of the humid tropics.
260 $aIthaca, N.Y.: Cornell University$c1979
300 $a44p.
490 $a(Cornell International Agriculture. Bulletin, 37).
520 $aIt is possible to study the fate of potassium fertilizer in highly weathered acid soils of the tropics because low amounts of potassium-fixing and potassium-releasing minerals are present. Potassium that is not leached or removed from the field in harvested material remains available on the soil exchange complex. On a Dark Red Latosol in Central Brazil, leaching began to occur only with the addition of 300 kg/ha K as KCl, which is well above the recommemded rate. The potassium content measured in grain crops varied with K status of the soil, from 1,4 percent to 1.9 percent in soybean and 0.23 percent to 0.39 percent in maize. The amount of K that will be exported from the field as grain is easily calculated, and at least this amount of K must be returned to the soil yearly in order to maintain production. If the stover is also removed, its K content should be taken into account as well. Forages removed from the field may contain 1 percent to 3 percent K on a dry-mattrer basis(...)
650 $aAdubação
650 $aCerrado
650 $aFertilidade do Solo
650 $aLixiviação
650 $aPotássio
653 $aBrasil
653 $aLatossolo vermelho-escuro
653 $aRegiao Central
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