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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha : |
12/10/2020 |
Actualizado : |
12/10/2020 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
GUTIÉRREZ, F.; GALLEGO, F.; PARUELO, J.; RODRIGUEZ, C. |
Afiliación : |
FRANCISCO GUTIÉRREZ, Grupo de Ecología de Pastizales, Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, Uruguay.; FEDERICO GALLEGO, Grupo de Ecología de Pastizales, Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, Uruguay.; JOSÉ PARUELO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Grupo de Ecología de Pastizales, Instituto de Ecología y Ciencias Ambientales, UdelaR, Montevideo; Facultad de Agronomía and IFEVA, UBA and CONICET, Argentina.; CLAUDIA RODRIGUEZ, Grupo de Ecología de Pastizales, Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, Uruguay. |
Título : |
Damping and lag effects of precipitation variability across trophic levels in Uruguayan rangelands. |
Fecha de publicación : |
2020 |
Fuente / Imprenta : |
Agricultural Systems, November 2020, Volume 185, Article number 102956. Doi: https://doi.org/10.1016/j.agsy.2020.102956 |
DOI : |
10.1016/j.agsy.2020.102956 |
Idioma : |
Inglés |
Notas : |
Article history: Received 21 February 2020/ Revised 12 September 2020,/Accepted 14 September 2020/ Available online 22 September 2020. |
Contenido : |
ABSTRACT: Extensive livestock production is one of the activities that, without requiring habitat conversion, contributes to
grassland conservation and human well-being. In Uruguay, approximately 60% of the land is covered by natural temperate grasslands, which are entirely devoted to extensive livestock production, mainly cattle and sheep. In this study we described the spatial and temporal variability of aboveground net primary productivity (ANPP), net secondary productivity (NSP) and trophic efficiency (TEf) of temperate grasslands in two geomorphological regions of Uruguay (Basaltic ?Cuesta? and Eastern Hills), and explored their relationship with the mean andannual precipitation (MAP and PPT, respectively). Specifically, we asked whether Uruguayan grasslands are able to damp precipitation variability at the levels of vegetation and herbivores. Additionally, we searched for lag effects of precipitation on primary and secondary productivity. The study period included seven growing seasons, from 2005 to 2012. PPT, ANPP and NSP were calculated monthly for 32 sections (administrative units) of both regions, and aggregated at the growing season level. NSP-related data included not only livestock numbers, but also livestock births, mortality and transportation, as well as milk and wool production. ANPP showed a clear inter-regional difference, the Eastern Hills region was more productive (69,814 MJ.ha?1.y?1) than the Basaltic ?Cuesta? (60,762 MJ.ha?1.y?1). NSP showed no inter-regional differences (742 vs. 754 MJ.ha?1.y?1, respectively) and TEf was higher in Basaltic ?Cuesta? (0.0125) than in Eastern Hills (0.0107). As expected, ANPP was
strongly determined by the amount of rainfall, both in space and time. Although we did not find a relationship between current year NSP and ANPP, secondary productivity was positively related with PPT and ANPP with a two-year lag in Basaltic ?Cuesta?. Also, we found that the interannual variabilities of ANPP and NSP were, respectively, 60 and 40% lower than the variability of precipitation, but contrary to our expectation, NSP was 40% more variable than ANPP. Only 1.17% of the energy captured by grasslands in Uruguay is converted into
domestic herbivore production, a value close to the average reported for other grasslands and savannas. MenosABSTRACT: Extensive livestock production is one of the activities that, without requiring habitat conversion, contributes to
grassland conservation and human well-being. In Uruguay, approximately 60% of the land is covered by natural temperate grasslands, which are entirely devoted to extensive livestock production, mainly cattle and sheep. In this study we described the spatial and temporal variability of aboveground net primary productivity (ANPP), net secondary productivity (NSP) and trophic efficiency (TEf) of temperate grasslands in two geomorphological regions of Uruguay (Basaltic ?Cuesta? and Eastern Hills), and explored their relationship with the mean andannual precipitation (MAP and PPT, respectively). Specifically, we asked whether Uruguayan grasslands are able to damp precipitation variability at the levels of vegetation and herbivores. Additionally, we searched for lag effects of precipitation on primary and secondary productivity. The study period included seven growing seasons, from 2005 to 2012. PPT, ANPP and NSP were calculated monthly for 32 sections (administrative units) of both regions, and aggregated at the growing season level. NSP-related data included not only livestock numbers, but also livestock births, mortality and transportation, as well as milk and wool production. ANPP showed a clear inter-regional difference, the Eastern Hills region was more productive (69,814 MJ.ha?1.y?1) than the Basaltic ?Cuesta? (60,762 MJ.ha?1.y?1). NSP showed no inter-... Presentar Todo |
Palabras claves : |
ABOVE-GROUND NET PRIMARY PRODUCTIVITY; INTERANNUAL VARIABILITY; LIVESTOCK SYSTEMS; NET SECONDARY PRODUCTIVITY; TROPICAL EFFICIENCY. |
Thesagro : |
SISTEMAS GANADEROS. |
Asunto categoría : |
-- |
Marc : |
LEADER 03300naa a2200253 a 4500 001 1061412 005 2020-10-12 008 2020 bl uuuu u00u1 u #d 024 7 $a10.1016/j.agsy.2020.102956$2DOI 100 1 $aGUTIÉRREZ, F. 245 $aDamping and lag effects of precipitation variability across trophic levels in Uruguayan rangelands.$h[electronic resource] 260 $c2020 500 $aArticle history: Received 21 February 2020/ Revised 12 September 2020,/Accepted 14 September 2020/ Available online 22 September 2020. 520 $aABSTRACT: Extensive livestock production is one of the activities that, without requiring habitat conversion, contributes to grassland conservation and human well-being. In Uruguay, approximately 60% of the land is covered by natural temperate grasslands, which are entirely devoted to extensive livestock production, mainly cattle and sheep. In this study we described the spatial and temporal variability of aboveground net primary productivity (ANPP), net secondary productivity (NSP) and trophic efficiency (TEf) of temperate grasslands in two geomorphological regions of Uruguay (Basaltic ?Cuesta? and Eastern Hills), and explored their relationship with the mean andannual precipitation (MAP and PPT, respectively). Specifically, we asked whether Uruguayan grasslands are able to damp precipitation variability at the levels of vegetation and herbivores. Additionally, we searched for lag effects of precipitation on primary and secondary productivity. The study period included seven growing seasons, from 2005 to 2012. PPT, ANPP and NSP were calculated monthly for 32 sections (administrative units) of both regions, and aggregated at the growing season level. NSP-related data included not only livestock numbers, but also livestock births, mortality and transportation, as well as milk and wool production. ANPP showed a clear inter-regional difference, the Eastern Hills region was more productive (69,814 MJ.ha?1.y?1) than the Basaltic ?Cuesta? (60,762 MJ.ha?1.y?1). NSP showed no inter-regional differences (742 vs. 754 MJ.ha?1.y?1, respectively) and TEf was higher in Basaltic ?Cuesta? (0.0125) than in Eastern Hills (0.0107). As expected, ANPP was strongly determined by the amount of rainfall, both in space and time. Although we did not find a relationship between current year NSP and ANPP, secondary productivity was positively related with PPT and ANPP with a two-year lag in Basaltic ?Cuesta?. Also, we found that the interannual variabilities of ANPP and NSP were, respectively, 60 and 40% lower than the variability of precipitation, but contrary to our expectation, NSP was 40% more variable than ANPP. Only 1.17% of the energy captured by grasslands in Uruguay is converted into domestic herbivore production, a value close to the average reported for other grasslands and savannas. 650 $aSISTEMAS GANADEROS 653 $aABOVE-GROUND NET PRIMARY PRODUCTIVITY 653 $aINTERANNUAL VARIABILITY 653 $aLIVESTOCK SYSTEMS 653 $aNET SECONDARY PRODUCTIVITY 653 $aTROPICAL EFFICIENCY 700 1 $aGALLEGO, F. 700 1 $aPARUELO, J. 700 1 $aRODRIGUEZ, C. 773 $tAgricultural Systems, November 2020, Volume 185, Article number 102956. Doi: https://doi.org/10.1016/j.agsy.2020.102956
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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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Biblioteca (s) : |
INIA Treinta y Tres. |
Fecha actual : |
19/07/2022 |
Actualizado : |
20/07/2022 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
Internacional - -- |
Autor : |
AMARAL, G.A. DO; AZEVEDO, E. B. DE; SAVIAN, J.V.; BREMM, C.; DAVID, D.B. DE; GONDA, H.L.; BINDELLE, J.; CARVALHO, P.C.F. |
Afiliación : |
GLÁUCIA AZEVEDO DO AMARAL, Department of Agricultural Diagnosis and Research, Hulha Negra, RS, Brazil.; EDUARDO BOHRER DE AZEVEDO, Department of Animal Science, Federal University of Santa Maria, Santa Maria, RS, Brazil. Federal University of Pampa, Itaqui, RS, Brazil.; JEAN VICTOR SAVIAN, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CAROLINA BREMM, Department of Agricultural Diagnosis and Research, Porto Alegre, RS, Brazil. Grazing Ecology Research Group, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.; DIEGO BITENCOURT DE DAVID, Federal University of Pampa, Itaqui, RS, Brazil. Department of Agricultural Diagnosis and Research, Sao Gabriel, RS, Brazil.; HORACIO LEANDRO GONDA, Swedish University of Agricultural Sciences, Uppsala, Sweden.; JEROME DINDELLE, Precision Livestock and Nutrition Unit, Gembloux Agro-Bio Tech, TERRA, Teaching and Research Centre, University of Li`ege, Gembloux, Belgium; PAULO CÉSAR DE FACCIO CARVALHO, Grazing Ecology Research Group, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil. |
Título : |
Purified and enriched lignin as a marker to estimate faecal output of sheep fed temperate and tropical grasses. |
Fecha de publicación : |
2022 |
Fuente / Imprenta : |
Livestock Science, 2022, Volume 263, Article number 105011. doi: https://doi.org/10.1016/j.livsci.2022.105011 |
Páginas : |
7 p. |
DOI : |
10.1016/j.livsci.2022.105011 |
Idioma : |
Inglés |
Notas : |
History article: Received 9 December 2021; Received in revised form 20 April 2022; Accepted 28 June 2022; Available online1 July 2022.
Corresponding author: eduardo.azevedo@ufsm.br (E.B. Azevedo). |
Contenido : |
Abstract: A series of trials were conducted in different experimental and feeding conditions to evaluate a purified and enriched lignin extracted from Eucalyptus grandis (LIPE®) as a marker to estimate faecal output in sheep fed temperate and tropical grasses. Two indoor trials were conducted in metabolism cages: the first one (Trial I) was conducted with sheep fed Italian ryegrass (Lolium multiflorum Lam.) pastures, which was evaluated in two different periods [Period I (n =14), and Period II (n =15)], and the second one (Trial II) was performed with sheep fed pearl millet [Pennisetum americanum (L.) Leeke] pastures (n =16). Grazing trials were performed with sheep grazing Italian ryegrass [Trial III (n =62)] and pearl millet [Trial IV (n =34)]. According to the manufacturer?s statements, sheep were dosed once a day with capsules containing 250 mg of LIPE® for a period of seven days, beginning two days before total faecal collections started and finishing on the last faecal collection day. To measure the observed daily faecal output, sheep were harnessed with faecal bags that were emptied once a day at 0800 h for five days. Faecal subsamples from indoor and grazing trials were taken to determine the LIPE® content by infrared spectroscopy. Regression analyses performed between estimated and observed faecal output (g DM/kg LW/day) by sheep were not significant (p >0.05) in three of the four evaluated trials. Faecal LIPE® recovery from the total data of the four trials showed a statistical difference when compared to the reference value (100%). In conclusion, our results show that the LIPE® marker presents low accuracy to estimate the daily faecal output of sheep fed temperate (Italian ryegrass) and tropical (pearl millet) grasses. MenosAbstract: A series of trials were conducted in different experimental and feeding conditions to evaluate a purified and enriched lignin extracted from Eucalyptus grandis (LIPE®) as a marker to estimate faecal output in sheep fed temperate and tropical grasses. Two indoor trials were conducted in metabolism cages: the first one (Trial I) was conducted with sheep fed Italian ryegrass (Lolium multiflorum Lam.) pastures, which was evaluated in two different periods [Period I (n =14), and Period II (n =15)], and the second one (Trial II) was performed with sheep fed pearl millet [Pennisetum americanum (L.) Leeke] pastures (n =16). Grazing trials were performed with sheep grazing Italian ryegrass [Trial III (n =62)] and pearl millet [Trial IV (n =34)]. According to the manufacturer?s statements, sheep were dosed once a day with capsules containing 250 mg of LIPE® for a period of seven days, beginning two days before total faecal collections started and finishing on the last faecal collection day. To measure the observed daily faecal output, sheep were harnessed with faecal bags that were emptied once a day at 0800 h for five days. Faecal subsamples from indoor and grazing trials were taken to determine the LIPE® content by infrared spectroscopy. Regression analyses performed between estimated and observed faecal output (g DM/kg LW/day) by sheep were not significant (p >0.05) in three of the four evaluated trials. Faecal LIPE® recovery from the total data of the four trials showed ... Presentar Todo |
Palabras claves : |
FAECAL EXCRETION; GRAZING; INDOOR; ITALIAN RYEGRASS; LIPE®; OVEJAS; PEARL MILLET. |
Asunto categoría : |
-- |
Marc : |
LEADER 02915naa a2200325 a 4500 001 1063435 005 2022-07-20 008 2022 bl uuuu u00u1 u #d 024 7 $a10.1016/j.livsci.2022.105011$2DOI 100 1 $aAMARAL, G.A. DO 245 $aPurified and enriched lignin as a marker to estimate faecal output of sheep fed temperate and tropical grasses.$h[electronic resource] 260 $c2022 300 $a7 p. 500 $aHistory article: Received 9 December 2021; Received in revised form 20 April 2022; Accepted 28 June 2022; Available online1 July 2022. Corresponding author: eduardo.azevedo@ufsm.br (E.B. Azevedo). 520 $aAbstract: A series of trials were conducted in different experimental and feeding conditions to evaluate a purified and enriched lignin extracted from Eucalyptus grandis (LIPE®) as a marker to estimate faecal output in sheep fed temperate and tropical grasses. Two indoor trials were conducted in metabolism cages: the first one (Trial I) was conducted with sheep fed Italian ryegrass (Lolium multiflorum Lam.) pastures, which was evaluated in two different periods [Period I (n =14), and Period II (n =15)], and the second one (Trial II) was performed with sheep fed pearl millet [Pennisetum americanum (L.) Leeke] pastures (n =16). Grazing trials were performed with sheep grazing Italian ryegrass [Trial III (n =62)] and pearl millet [Trial IV (n =34)]. According to the manufacturer?s statements, sheep were dosed once a day with capsules containing 250 mg of LIPE® for a period of seven days, beginning two days before total faecal collections started and finishing on the last faecal collection day. To measure the observed daily faecal output, sheep were harnessed with faecal bags that were emptied once a day at 0800 h for five days. Faecal subsamples from indoor and grazing trials were taken to determine the LIPE® content by infrared spectroscopy. Regression analyses performed between estimated and observed faecal output (g DM/kg LW/day) by sheep were not significant (p >0.05) in three of the four evaluated trials. Faecal LIPE® recovery from the total data of the four trials showed a statistical difference when compared to the reference value (100%). In conclusion, our results show that the LIPE® marker presents low accuracy to estimate the daily faecal output of sheep fed temperate (Italian ryegrass) and tropical (pearl millet) grasses. 653 $aFAECAL EXCRETION 653 $aGRAZING 653 $aINDOOR 653 $aITALIAN RYEGRASS 653 $aLIPE® 653 $aOVEJAS 653 $aPEARL MILLET 700 1 $aAZEVEDO, E. B. DE 700 1 $aSAVIAN, J.V. 700 1 $aBREMM, C. 700 1 $aDAVID, D.B. DE 700 1 $aGONDA, H.L. 700 1 $aBINDELLE, J. 700 1 $aCARVALHO, P.C.F. 773 $tLivestock Science, 2022, Volume 263, Article number 105011. doi: https://doi.org/10.1016/j.livsci.2022.105011
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