| |
|
|
 | Acceso al texto completo restringido a Biblioteca INIA Tacuarembó. Por información adicional contacte bibliotb@tb.inia.org.uy. |
|
Registro completo
|
|
Biblioteca (s) : |
INIA Tacuarembó. |
|
Fecha : |
11/09/2014 |
|
Actualizado : |
13/05/2020 |
|
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
|
Autor : |
DE BARBIERI, I.; HEGARTY, R.S.; ODDY, V.H.; BARNETT, M.C.; LI, L.; NOLAN, J.V. |
|
Afiliación : |
LUIS IGNACIO DE BARBIERI ETCHEBERRY, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ROGER S. HEGARTY, School of Environmental and Rural Science, University of New England, Trevenna Road, Armidale, NSW 2351, Australia; V. HUTTON ODDY, Beef Industry Centre, Department of Primary Industries NSW, Trevenna Road, Armidale, NSW 2351, Australia; MARK BARNETT, School of Environmental and Rural Science, University of New England, Trevenna Road, Armidale, NSW 2351, Australia; L. LI, School of Environmental and Rural Science, University of New England, Trevenna Road, Armidale, NSW 2351, Australia; JOHN V. NOLAN, School of Environmental and Rural Science, University of New England, Trevenna Road, Armidale, NSW 2351, Australia. |
|
Título : |
Sheep of divergent genetic merit for wool growth do not differ in digesta kinetics while on restricted intakes. |
|
Fecha de publicación : |
2014 |
|
Fuente / Imprenta : |
Animal Production Science, May 2014, v. 54, no. 9, p. 1243-1247. DOI: https://doi.org/10.1071/AN14319 |
|
DOI : |
10.1071/AN14319 |
|
Idioma : |
Inglés |
|
Notas : |
Received 12 March 2014; accepted 12 May 2014; published online 10 July 2014. Acknowledgements: The authors thank Evelyn Osborne, Jose Velazco, Alistair Donaldson, Carolina Silveira, Gary Cluley, Leanne Lisle, Sue Mortimer and Andrew Blakely for their technical support. Ignacio De Barbieri was supported by National Institute for Agricultural Research (INIA Uruguay). |
|
Contenido : |
Sheep selected for high wool growth were previously shown to exhibit higher microbial protein outflow from the rumen and higher uptake of amino nitrogen in portal blood than those selected for low wool growth. This suggests that genetic selection for wool growth may induce changes in foregut physiology. This study was undertaken to determine whether differences in digesta kinetics, especially mean retention mime (MRT), are associated with differences in fleece production between sheep with low or high estimated breeding values (EBVs) for fleece weight. Twenty mature Merino wethers with uniform EBVs for liveweight were allocated to two groups of 10 animals on the basis of high or low EBVs for yearling fleece weight. Five sheep with low-EBVs and five sheep with high-EBVs for fleece weight groups were allocated in a crossover design to low and high feeding-level treatments, which comprised a blended hay diet fed at maintenance or 1.5 times maintenance. All sheep were given single doses of chromium-mordanted fibre and cobalt-EDTA as inert, non-digestible markers. Digesta kinetics was determined by analysis of the faecal marker excretion patterns using
a compartmental model. Higher feed intakes from animals fed 1.5 times maintenance were associated with higher rates of wool growth and higher masses of indigestible fibre in the gut, but reduced MRT of digesta. Although sheep with higher EBVs for fleece weight had higher wool growth rates, there was no indication that these wool growth differences were associated with differences in digesta kinetics. The lack of interaction between feeding level and genotype suggests that MRT did not contribute to genotype differences in wool growth in sheep fed restricted intakes. The differences in wool growth among commercial Merino sheep with divergent fleece weight EBVs achieved by multi-trait selection are not attributable to differences in digesta kinetics, at least when feed is not available ad libitum. MenosSheep selected for high wool growth were previously shown to exhibit higher microbial protein outflow from the rumen and higher uptake of amino nitrogen in portal blood than those selected for low wool growth. This suggests that genetic selection for wool growth may induce changes in foregut physiology. This study was undertaken to determine whether differences in digesta kinetics, especially mean retention mime (MRT), are associated with differences in fleece production between sheep with low or high estimated breeding values (EBVs) for fleece weight. Twenty mature Merino wethers with uniform EBVs for liveweight were allocated to two groups of 10 animals on the basis of high or low EBVs for yearling fleece weight. Five sheep with low-EBVs and five sheep with high-EBVs for fleece weight groups were allocated in a crossover design to low and high feeding-level treatments, which comprised a blended hay diet fed at maintenance or 1.5 times maintenance. All sheep were given single doses of chromium-mordanted fibre and cobalt-EDTA as inert, non-digestible markers. Digesta kinetics was determined by analysis of the faecal marker excretion patterns using
a compartmental model. Higher feed intakes from animals fed 1.5 times maintenance were associated with higher rates of wool growth and higher masses of indigestible fibre in the gut, but reduced MRT of digesta. Although sheep with higher EBVs for fleece weight had higher wool growth rates, there was no indication that these wool gr... Presentar Todo |
|
Palabras claves : |
ESTIMATED BREEDING VALUES; FEED INTAKE; FLEECE WEIGHT; MEAN RETENTION TIME. |
|
Thesagro : |
OVINOS. |
|
Asunto categoría : |
L01 Ganadería |
|
Marc : |
LEADER 03128naa a2200265 a 4500
001 1050143
005 2020-05-13
008 2014 bl uuuu u00u1 u #d
024 7 $a10.1071/AN14319$2DOI
100 1 $aDE BARBIERI, I.
245 $aSheep of divergent genetic merit for wool growth do not differ in digesta kinetics while on restricted intakes.
260 $c2014
500 $aReceived 12 March 2014; accepted 12 May 2014; published online 10 July 2014. Acknowledgements: The authors thank Evelyn Osborne, Jose Velazco, Alistair Donaldson, Carolina Silveira, Gary Cluley, Leanne Lisle, Sue Mortimer and Andrew Blakely for their technical support. Ignacio De Barbieri was supported by National Institute for Agricultural Research (INIA Uruguay).
520 $aSheep selected for high wool growth were previously shown to exhibit higher microbial protein outflow from the rumen and higher uptake of amino nitrogen in portal blood than those selected for low wool growth. This suggests that genetic selection for wool growth may induce changes in foregut physiology. This study was undertaken to determine whether differences in digesta kinetics, especially mean retention mime (MRT), are associated with differences in fleece production between sheep with low or high estimated breeding values (EBVs) for fleece weight. Twenty mature Merino wethers with uniform EBVs for liveweight were allocated to two groups of 10 animals on the basis of high or low EBVs for yearling fleece weight. Five sheep with low-EBVs and five sheep with high-EBVs for fleece weight groups were allocated in a crossover design to low and high feeding-level treatments, which comprised a blended hay diet fed at maintenance or 1.5 times maintenance. All sheep were given single doses of chromium-mordanted fibre and cobalt-EDTA as inert, non-digestible markers. Digesta kinetics was determined by analysis of the faecal marker excretion patterns using a compartmental model. Higher feed intakes from animals fed 1.5 times maintenance were associated with higher rates of wool growth and higher masses of indigestible fibre in the gut, but reduced MRT of digesta. Although sheep with higher EBVs for fleece weight had higher wool growth rates, there was no indication that these wool growth differences were associated with differences in digesta kinetics. The lack of interaction between feeding level and genotype suggests that MRT did not contribute to genotype differences in wool growth in sheep fed restricted intakes. The differences in wool growth among commercial Merino sheep with divergent fleece weight EBVs achieved by multi-trait selection are not attributable to differences in digesta kinetics, at least when feed is not available ad libitum.
650 $aOVINOS
653 $aESTIMATED BREEDING VALUES
653 $aFEED INTAKE
653 $aFLEECE WEIGHT
653 $aMEAN RETENTION TIME
700 1 $aHEGARTY, R.S.
700 1 $aODDY, V.H.
700 1 $aBARNETT, M.C.
700 1 $aLI, L.
700 1 $aNOLAN, J.V.
773 $tAnimal Production Science, May 2014$gv. 54, no. 9, p. 1243-1247. DOI: https://doi.org/10.1071/AN14319
Descargar
Esconder MarcPresentar Marc Completo |
|
Registro original : |
INIA Tacuarembó (TBO) |
|
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
|
|
| Acceso al texto completo restringido a Biblioteca INIA Tacuarembó. Por información adicional contacte bibliotb@tb.inia.org.uy. |
|
Registro completo
|
|
Biblioteca (s) : |
INIA Tacuarembó. |
|
Fecha actual : |
21/02/2014 |
|
Actualizado : |
08/10/2019 |
|
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
|
Circulación / Nivel : |
Internacional - -- |
|
Autor : |
BENTANCOR, L.; HERNÁNDEZ, J.; DEL PINO, A.; CALIFRA, A.; RESQUÍN, F.; GONZÁLEZ-BARRIOS, P. |
|
Afiliación : |
LUIS BENTANCOR, Universidad de la República (UdelaR)/ Facultad de Agronomía; JORGE HERNÁNDEZ, Universidad de la República (UdelaR)/ Facultad de Agronomía; AMABELIA DEL PINO, Universidad de la República (UdelaR)/ Facultad de Agronomía; ÁLVARO CALIFRA, Universidad de la República (UdelaR)/ Facultad de Agronomía; JOSE FERNANDO RESQUIN PEREZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; PABLO GONZÁLEZ-BARRIOS, Universidad de la República (UdelaR)/ Facultad de Agronomía. |
|
Título : |
Evaluation of the biomass production, energy yield and nutrient removal of Eucalyptus dunnii Maiden grown in short rotation coppice under two initial planting densities and harvest systems. |
|
Fecha de publicación : |
2019 |
|
Fuente / Imprenta : |
Biomass and Bioenergy, 2019, v. 122, p. 165-174. |
|
DOI : |
10.1016/j.biombioe.2019.01.019 |
|
Idioma : |
Inglés |
|
Notas : |
Article history: Received 31 August 2018 // Received in revised form 18 January 2019 // Accepted 21 January 2019. |
|
Contenido : |
Bioenergy is an important component of the renewable energy mix, helping to ensure a stable energy supply. One of the alternatives for bioenergy production is the use of Eucalypts sp. grown on short rotation coppice under different harvest systems. Because in some cases all components of the tree are harvested, there could be implications regarding the sustainability of this type of system. For this reason, new information is required to assess this alternative energy source. The objective of the research was to estimate the biomass production, energy yield, nutrient concentration, nutrient removal, and energy yield per kg of nutrient removal (EYNR) of four years old E. dunnii using two initial planting densities (3 m×1.5 m and 3 m×0.75 m) into two different
sites comparing two harvest systems; stemwood without debarking (System A) vs whole tree (System B). There was no impact of the planting density on the biomass production and energy yield per hectare. Significant differences of nutrient concentrations in different tree components were observed, but generally with similar magnitude between the two densities. The magnitude of nutrients removal caused by forest biomass varied depending on the nutrient, tree component, and biomass production. For the biomass production, energy yield, nutrient removal per hectare and EYNR system B was always significantly higher than system A. According to these results system B is more efficient from the energy yield perspective, but less sustainable from the soil
fertility point of view. MenosBioenergy is an important component of the renewable energy mix, helping to ensure a stable energy supply. One of the alternatives for bioenergy production is the use of Eucalypts sp. grown on short rotation coppice under different harvest systems. Because in some cases all components of the tree are harvested, there could be implications regarding the sustainability of this type of system. For this reason, new information is required to assess this alternative energy source. The objective of the research was to estimate the biomass production, energy yield, nutrient concentration, nutrient removal, and energy yield per kg of nutrient removal (EYNR) of four years old E. dunnii using two initial planting densities (3 m×1.5 m and 3 m×0.75 m) into two different
sites comparing two harvest systems; stemwood without debarking (System A) vs whole tree (System B). There was no impact of the planting density on the biomass production and energy yield per hectare. Significant differences of nutrient concentrations in different tree components were observed, but generally with similar magnitude between the two densities. The magnitude of nutrients removal caused by forest biomass varied depending on the nutrient, tree component, and biomass production. For the biomass production, energy yield, nutrient removal per hectare and EYNR system B was always significantly higher than system A. According to these results system B is more efficient from the energy yield perspective, but less su... Presentar Todo |
|
Palabras claves : |
DIFFERENT PLANTATION DENSITIES; ENERGY YIELD; EUCALYPTUS SP; FOREST BIOMASS; NUTRIENTS REMOVAL; SHORT ROTATION COPPICE. |
|
Thesagro : |
FORESTACIÓN. |
|
Asunto categoría : |
K10 Producción forestal |
|
Marc : |
LEADER 02609naa a2200289 a 4500
001 1027698
005 2019-10-08
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1016/j.biombioe.2019.01.019$2DOI
100 1 $aBENTANCOR, L.
245 $aEvaluation of the biomass production, energy yield and nutrient removal of Eucalyptus dunnii Maiden grown in short rotation coppice under two initial planting densities and harvest systems.$h[electronic resource]
260 $c2019
500 $aArticle history: Received 31 August 2018 // Received in revised form 18 January 2019 // Accepted 21 January 2019.
520 $aBioenergy is an important component of the renewable energy mix, helping to ensure a stable energy supply. One of the alternatives for bioenergy production is the use of Eucalypts sp. grown on short rotation coppice under different harvest systems. Because in some cases all components of the tree are harvested, there could be implications regarding the sustainability of this type of system. For this reason, new information is required to assess this alternative energy source. The objective of the research was to estimate the biomass production, energy yield, nutrient concentration, nutrient removal, and energy yield per kg of nutrient removal (EYNR) of four years old E. dunnii using two initial planting densities (3 m×1.5 m and 3 m×0.75 m) into two different sites comparing two harvest systems; stemwood without debarking (System A) vs whole tree (System B). There was no impact of the planting density on the biomass production and energy yield per hectare. Significant differences of nutrient concentrations in different tree components were observed, but generally with similar magnitude between the two densities. The magnitude of nutrients removal caused by forest biomass varied depending on the nutrient, tree component, and biomass production. For the biomass production, energy yield, nutrient removal per hectare and EYNR system B was always significantly higher than system A. According to these results system B is more efficient from the energy yield perspective, but less sustainable from the soil fertility point of view.
650 $aFORESTACIÓN
653 $aDIFFERENT PLANTATION DENSITIES
653 $aENERGY YIELD
653 $aEUCALYPTUS SP
653 $aFOREST BIOMASS
653 $aNUTRIENTS REMOVAL
653 $aSHORT ROTATION COPPICE
700 1 $aHERNÁNDEZ, J.
700 1 $aDEL PINO, A.
700 1 $aCALIFRA, A.
700 1 $aRESQUÍN, F.
700 1 $aGONZÁLEZ-BARRIOS, P.
773 $tBiomass and Bioenergy, 2019$gv. 122, p. 165-174.
Descargar
Esconder MarcPresentar Marc Completo |
|
Registro original : |
INIA Tacuarembó (TBO) |
|
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
| Expresión de búsqueda válido. Check! |
|
|
