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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha : |
21/02/2014 |
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Actualizado : |
22/02/2014 |
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Autor : |
Hidalgo, O.A. ; Rincón, H. |
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Título : |
Avances en la producción de tubérculo-semilla de papa en los países del cono sur |
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Fecha de publicación : |
1989 |
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Fuente / Imprenta : |
Lima (Perú): CIP, 1989. |
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Páginas : |
199p. |
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ISBN : |
ISBN 92-9060-135-3 |
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Idioma : |
Español |
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Thesagro : |
AMERICA DEL SUR; CALIDAD; CERTIFICACION DE SEMILLAS; CUARENTENA; CULTIVOS DE SEMILLAS; DATOS DE PRODUCCION; EXPLOTACIONES AGRARIAS; FITOMEJORAMIENTO; INSTITUCIONES DE INVESTIGACION; MATERIALES DE PROPAGACION; PAPA; PRODUCCION; PROPAGACION DE PLANTAS; PROTECCION DE LAS PLANTAS; SEMILLAS; TUBERCULO; VARIEDADES. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 00908nam a2200325 a 4500
001 1000460
005 2014-02-22
008 1989 bl uuuu u00u1 u #d
100 1 $aHIDALGO, O.A.
245 $aAvances en la producción de tubérculo-semilla de papa en los países del cono sur
260 $aLima (Perú): CIP$c1989
300 $a199p.
650 $aAMERICA DEL SUR
650 $aCALIDAD
650 $aCERTIFICACION DE SEMILLAS
650 $aCUARENTENA
650 $aCULTIVOS DE SEMILLAS
650 $aDATOS DE PRODUCCION
650 $aEXPLOTACIONES AGRARIAS
650 $aFITOMEJORAMIENTO
650 $aINSTITUCIONES DE INVESTIGACION
650 $aMATERIALES DE PROPAGACION
650 $aPAPA
650 $aPRODUCCION
650 $aPROPAGACION DE PLANTAS
650 $aPROTECCION DE LAS PLANTAS
650 $aSEMILLAS
650 $aTUBERCULO
650 $aVARIEDADES
700 1 $aRINCÓN, H.
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Registro original : |
INIA Las Brujas (LB) |
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 | Acceso al texto completo restringido a Biblioteca INIA Treinta y Tres. Por información adicional contacte bibliott@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha actual : |
25/11/2015 |
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Actualizado : |
11/10/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - B |
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Autor : |
HERD, R.M.; VELAZCO, J.I.; ARTHUR, P. F.; HEGARTY, R. S. |
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Afiliación : |
NSW Department of Primary Industries, Beef Industry Centre, Australia; JOSÉ IGNACIO VELAZCO DE LOS REYES, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Environmental and Rural Science, University of New England, Australia.; NSW Department of Primary Industries, Agricultural Institute, Australia.; Environmental and Rural Science, University of New England, Australia. |
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Título : |
Proxies to adjust methane production rate of beef cattle when the quantity of feed consumed is unknown. |
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Fecha de publicación : |
2016 |
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Fuente / Imprenta : |
Animal Production Science, 2016, 56, p. 231-237. |
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DOI : |
10.1071/AN15477 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 24 August 2015, accepted 11 November 2015, published online 9 February 2016.
http://dx.doi.org/10.1071/AN15477 |
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Contenido : |
Abstract:
The aim of this experiment was to evaluate the utility of CO2 production rate (CPR; g CO2/d) and animal weight (WT) data as proxies for feed-intake to adjust methane production rate (MPR; g CH4/d) in situations where dry-matter intake (DMI) is not known. This experiment measured individual-animal DMI, MPR and CPR in the feedlot, and then again on restricted quantities of grain and roughage diets in open-circuit respiration chambers. Of the 59 cattle tested in the feedlot, 41 had MPR and CPR recorded, and 59 and 57 had test results on the restricted grain and roughage rations. Methane production relative to DMI by individual animals was calculated as methane yield (MY; MPR/ DMI) and as residual methane production (RMPDMI; calculated as MPR less predicted MPR based on DMI). A second form of residual methane production: RMPCO2, was calculated by regressing MPR against CPR to determine whether animals were producing more or less CH4 than predicted for their CPR. Carbon-dioxide production rate was positively associated with DMI in all 3 test phases (R2=0.25, 0.45 and 0.47; all P<0.001). The associations for MY with MPR:CPR were moderate and positive: R2=0.49 in the feedlot test; R2=0.37 in the restricted grain test; and R2=0.59 in the restricted roughage test, and with RMPCO2 R-square were 0.57, 0.34 and 0.59 in the 3 test phases (all P<0.001). The R-square for RMPDMI with MPR:CPR in all 3 tests were 0.50, 0.79 and 0.69, and with RMPCO2 R-square were 0.68, 0.79 and 0.68 (all P<0.001). The high R-square for MY with MPR:CPR and RMPCO2 and even higher R-square for RMPDMI with MPR:CPR and RMPCO2 in all 3 test phases showed that CPR can be used to adjust MPR data for DMI when DMI is not recorded. In the feedlot test, where animal WT data was recorded over 70 days, MPR adjusted for WT and WT gain had R-square with MY and RMPDMI of 0.60 and 0.83 respectively (P<0.001) offering the possibility that animal WT data determined over an extended time period could also be used as a proxy for DMI in adjustment of MPR. MenosAbstract:
The aim of this experiment was to evaluate the utility of CO2 production rate (CPR; g CO2/d) and animal weight (WT) data as proxies for feed-intake to adjust methane production rate (MPR; g CH4/d) in situations where dry-matter intake (DMI) is not known. This experiment measured individual-animal DMI, MPR and CPR in the feedlot, and then again on restricted quantities of grain and roughage diets in open-circuit respiration chambers. Of the 59 cattle tested in the feedlot, 41 had MPR and CPR recorded, and 59 and 57 had test results on the restricted grain and roughage rations. Methane production relative to DMI by individual animals was calculated as methane yield (MY; MPR/ DMI) and as residual methane production (RMPDMI; calculated as MPR less predicted MPR based on DMI). A second form of residual methane production: RMPCO2, was calculated by regressing MPR against CPR to determine whether animals were producing more or less CH4 than predicted for their CPR. Carbon-dioxide production rate was positively associated with DMI in all 3 test phases (R2=0.25, 0.45 and 0.47; all P<0.001). The associations for MY with MPR:CPR were moderate and positive: R2=0.49 in the feedlot test; R2=0.37 in the restricted grain test; and R2=0.59 in the restricted roughage test, and with RMPCO2 R-square were 0.57, 0.34 and 0.59 in the 3 test phases (all P<0.001). The R-square for RMPDMI with MPR:CPR in all 3 tests were 0.50, 0.79 and 0.69, and with RMPCO2 R-square were 0.68, 0.79 and 0.68... Presentar Todo |
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Palabras claves : |
GANADO VACUNO; GAS METANO; GASES EFECTO INVERNADERO; GEM; GREENHOUSE GAS; RESPIRATION CHAMBER. |
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Asunto categoría : |
P01 Conservación de la naturaleza y recursos de La tierra |
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Marc : |
LEADER 02904naa a2200253 a 4500
001 1053986
005 2019-10-11
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1071/AN15477$2DOI
100 1 $aHERD, R.M.
245 $aProxies to adjust methane production rate of beef cattle when the quantity of feed consumed is unknown.$h[electronic resource]
260 $c2016
500 $aArticle history: Received 24 August 2015, accepted 11 November 2015, published online 9 February 2016. http://dx.doi.org/10.1071/AN15477
520 $aAbstract: The aim of this experiment was to evaluate the utility of CO2 production rate (CPR; g CO2/d) and animal weight (WT) data as proxies for feed-intake to adjust methane production rate (MPR; g CH4/d) in situations where dry-matter intake (DMI) is not known. This experiment measured individual-animal DMI, MPR and CPR in the feedlot, and then again on restricted quantities of grain and roughage diets in open-circuit respiration chambers. Of the 59 cattle tested in the feedlot, 41 had MPR and CPR recorded, and 59 and 57 had test results on the restricted grain and roughage rations. Methane production relative to DMI by individual animals was calculated as methane yield (MY; MPR/ DMI) and as residual methane production (RMPDMI; calculated as MPR less predicted MPR based on DMI). A second form of residual methane production: RMPCO2, was calculated by regressing MPR against CPR to determine whether animals were producing more or less CH4 than predicted for their CPR. Carbon-dioxide production rate was positively associated with DMI in all 3 test phases (R2=0.25, 0.45 and 0.47; all P<0.001). The associations for MY with MPR:CPR were moderate and positive: R2=0.49 in the feedlot test; R2=0.37 in the restricted grain test; and R2=0.59 in the restricted roughage test, and with RMPCO2 R-square were 0.57, 0.34 and 0.59 in the 3 test phases (all P<0.001). The R-square for RMPDMI with MPR:CPR in all 3 tests were 0.50, 0.79 and 0.69, and with RMPCO2 R-square were 0.68, 0.79 and 0.68 (all P<0.001). The high R-square for MY with MPR:CPR and RMPCO2 and even higher R-square for RMPDMI with MPR:CPR and RMPCO2 in all 3 test phases showed that CPR can be used to adjust MPR data for DMI when DMI is not recorded. In the feedlot test, where animal WT data was recorded over 70 days, MPR adjusted for WT and WT gain had R-square with MY and RMPDMI of 0.60 and 0.83 respectively (P<0.001) offering the possibility that animal WT data determined over an extended time period could also be used as a proxy for DMI in adjustment of MPR.
653 $aGANADO VACUNO
653 $aGAS METANO
653 $aGASES EFECTO INVERNADERO
653 $aGEM
653 $aGREENHOUSE GAS
653 $aRESPIRATION CHAMBER
700 1 $aVELAZCO, J.I.
700 1 $aARTHUR, P. F.
700 1 $aHEGARTY, R. S.
773 $tAnimal Production Science, 2016, 56, p. 231-237.
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