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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha : |
11/12/2020 |
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Actualizado : |
21/05/2021 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
OÑATIBIA, G.R.; GOLLUSCIO, R.A.; TEXEIRA, M.; PARUELO, J. |
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Afiliación : |
GASTÓN RAFAEL OÑATIBIA, CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Fisiologicas y Ecol ´ ogicas Vinculadas a la Agricultura (IFEVA), ´ Av. San Mart´?n 4453 (C1417DSE), Buenos Aires 1417 Argentina.; RODOLFO A. GOLLUSCIO, CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA), Av. San Martín 4453 (C1417DSE), Buenos Aires, 1417 Argentina.; MARCOS TEXEIRA, CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA), Av. San Martín 4453 (C1417DSE), Buenos Aires, 1417 Argentina.; JOSÉ PARUELO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.;Laboratorio de Análisis Regional y Teledetección, Depto. Métodos Cuantitativos y Sistemas de Información, Facultad de Agronomía and IFEVA, UBA and CONICET, Buenos, Argentina. |
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Título : |
Controls of forage selective defoliation by sheep in arid rangelands |
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Fecha de publicación : |
2020 |
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Fuente / Imprenta : |
Ecosphere, vol. no.11, November 2020, e03285. Doi https://doi.org/10.1002/ecs2.3285 |
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DOI : |
10.1002/ecs2.3285 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 16 November 2019/ Revised 8 July 2020/ Accepted 15 July 2020./First published: 06 November 2020. |
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Contenido : |
Abstract. Selective grazing by domestic livestock is a major control of plant community structure and dynamics in drylands. However, grazing impact predictions supporting management decisions are frequently based on average biomass consumption, neglecting selectivity. We evaluated the relative importance of grazing pressure, total and each species density, and plant dead biomass proportion as drivers of
selective defoliation by sheep in three dominant native grass species in Patagonian steppes. Species were Poa ligularis, Festuca pallescens, and Pappostipa speciosa, which a priori present different preference degree by sheep. The relevance of these drivers for differently preferred species has not been simultaneously studied. We recorded the defoliation frequency and degree of the three species (dependent variables) throughout 112 field surveys. Besides, we recorded grazing management and vegetation structure descriptors (independent variables). Poa ligularis was highly defoliated (90% of plants), and grazing pressure was the leading driver (asymptotic exponential relationship). For F. pallescens, almost 70% of plants were defoliated,and defoliation non-linearly increased as grazing pressure rose and linearly decreased as both its dead biomass proportion and P. ligularis density increased. For P. speciosa, defoliation was low (20% of plants) and
linearly decreased as both its dead biomass proportion and the density of the other two species increased. Grazing pressure played a negligible role in this species. These patterns confirmed that P. ligularis, F. pallescens, and P. speciosa, respectively, present high, intermediate, and low preference degree by sheep. In conclusion, our findings suggest that (1) selective defoliation can be satisfactorily predicted as function of
grazing pressure, species densities, and plant dead biomass proportion; (2) grazing pressure becomes a more relevant driver as species preference rises and its effect on defoliation is markedly non-linear; (3) the dead biomass proportion and the abundance of highly preferred species are the leading factors determining less preferred species defoliation; and (4) grazing pressure management by itself is not enough to
reduce the high defoliation of preferred species and increase the defoliation of non-preferred species. This knowledge is critical for developing effective management practices to control forage species defoliation in rangelands worldwide where species with different preference by herbivores coexist. MenosAbstract. Selective grazing by domestic livestock is a major control of plant community structure and dynamics in drylands. However, grazing impact predictions supporting management decisions are frequently based on average biomass consumption, neglecting selectivity. We evaluated the relative importance of grazing pressure, total and each species density, and plant dead biomass proportion as drivers of
selective defoliation by sheep in three dominant native grass species in Patagonian steppes. Species were Poa ligularis, Festuca pallescens, and Pappostipa speciosa, which a priori present different preference degree by sheep. The relevance of these drivers for differently preferred species has not been simultaneously studied. We recorded the defoliation frequency and degree of the three species (dependent variables) throughout 112 field surveys. Besides, we recorded grazing management and vegetation structure descriptors (independent variables). Poa ligularis was highly defoliated (90% of plants), and grazing pressure was the leading driver (asymptotic exponential relationship). For F. pallescens, almost 70% of plants were defoliated,and defoliation non-linearly increased as grazing pressure rose and linearly decreased as both its dead biomass proportion and P. ligularis density increased. For P. speciosa, defoliation was low (20% of plants) and
linearly decreased as both its dead biomass proportion and the density of the other two species increased. Grazing pressure played ... Presentar Todo |
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Palabras claves : |
GRASSLAND LOSSES; MODIS NDVI; PHENOLOGICAL CLASSIFICATIONS; RIO DE LA PLATA GRASSSLANDS. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 03337naa a2200229 a 4500
001 1061581
005 2021-05-21
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1002/ecs2.3285$2DOI
100 1 $aOÑATIBIA, G.R.
245 $aControls of forage selective defoliation by sheep in arid rangelands$h[electronic resource]
260 $c2020
500 $aArticle history: Received 16 November 2019/ Revised 8 July 2020/ Accepted 15 July 2020./First published: 06 November 2020.
520 $aAbstract. Selective grazing by domestic livestock is a major control of plant community structure and dynamics in drylands. However, grazing impact predictions supporting management decisions are frequently based on average biomass consumption, neglecting selectivity. We evaluated the relative importance of grazing pressure, total and each species density, and plant dead biomass proportion as drivers of selective defoliation by sheep in three dominant native grass species in Patagonian steppes. Species were Poa ligularis, Festuca pallescens, and Pappostipa speciosa, which a priori present different preference degree by sheep. The relevance of these drivers for differently preferred species has not been simultaneously studied. We recorded the defoliation frequency and degree of the three species (dependent variables) throughout 112 field surveys. Besides, we recorded grazing management and vegetation structure descriptors (independent variables). Poa ligularis was highly defoliated (90% of plants), and grazing pressure was the leading driver (asymptotic exponential relationship). For F. pallescens, almost 70% of plants were defoliated,and defoliation non-linearly increased as grazing pressure rose and linearly decreased as both its dead biomass proportion and P. ligularis density increased. For P. speciosa, defoliation was low (20% of plants) and linearly decreased as both its dead biomass proportion and the density of the other two species increased. Grazing pressure played a negligible role in this species. These patterns confirmed that P. ligularis, F. pallescens, and P. speciosa, respectively, present high, intermediate, and low preference degree by sheep. In conclusion, our findings suggest that (1) selective defoliation can be satisfactorily predicted as function of grazing pressure, species densities, and plant dead biomass proportion; (2) grazing pressure becomes a more relevant driver as species preference rises and its effect on defoliation is markedly non-linear; (3) the dead biomass proportion and the abundance of highly preferred species are the leading factors determining less preferred species defoliation; and (4) grazing pressure management by itself is not enough to reduce the high defoliation of preferred species and increase the defoliation of non-preferred species. This knowledge is critical for developing effective management practices to control forage species defoliation in rangelands worldwide where species with different preference by herbivores coexist.
653 $aGRASSLAND LOSSES
653 $aMODIS NDVI
653 $aPHENOLOGICAL CLASSIFICATIONS
653 $aRIO DE LA PLATA GRASSSLANDS
700 1 $aGOLLUSCIO, R.A.
700 1 $aTEXEIRA, M.
700 1 $aPARUELO, J.
773 $tEcosphere, vol. no.11, November 2020, e03285. Doi https://doi.org/10.1002/ecs2.3285
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INIA La Estanzuela (LE) |
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| Acceso al texto completo restringido a Biblioteca INIA Las Brujas. Por información adicional contacte bibliolb@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha actual : |
29/10/2019 |
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Actualizado : |
12/11/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
URRABURU, M.; AGUAYO, E.; ZOPPOLO, R.; SILVEIRA, A.C. |
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Afiliación : |
MARIANA URRABURU BORDON, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; E. AGUAYO, Grupo de Postrecoleccio?n y Refrigeracio?n, Universidad Polite?cnica de Cartagena, Spain; ROBERTO JOSE ZOPPOLO GOLDSCHMIDT, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; A.C. SILVEIRA, Poscosecha de Frutas y Hortalizas, Departamento de Produccio?n Vegetal, Facultad de Agronom??a, Universidad de La Repu?blica, Uruguay. |
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Título : |
Postharvest and functional behavior of some feijoa genetic materials. (Conference paper). |
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Fecha de publicación : |
2018 |
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Fuente / Imprenta : |
Acta Horticulturae, 2018, no. 1194, pages 73-78. |
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Serie : |
(Acta Horticulturae; 1194) |
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ISBN : |
978-94-62611-90-0 |
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ISSN : |
0567-7572 (print) / 2406-6168 (electronic) |
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DOI : |
10.17660/ActaHortic.2018.1194.12 |
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Idioma : |
Inglés |
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Notas : |
In: Acta Horticulturae (ISHS) 1194: VIII International Postharvest Symposium: Enhancing Supply Chain and Consumer Benefits - Ethical and Technological Issues. Editors: F. Artés-Hernández, P.A. Gómez, E. Aguayo, F. Artés. Publication date: 4 april 2018. |
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Contenido : |
ABSTRACT.
Feijoa (Acca sellowiana (Berg.) Burret) is one of the most popular native Uruguayan trees whose functional characteristics have attracted the interest for commercial cultivation. The aim of this work was to evaluate the postharvest behavior of six genetic materials, identified as 95, 97, 98, 152, 153 and 154 from the Facultad de Agronomía and Instituto Nacional de Investigación Agropecuaria (INIA, Uruguay) breeding program. Fruits harvested at two maturity stages (M1: not easily picked; M2: touch picking) were stored for 0, 15 and 30 days at 5°C and 95% relative humidity (RH) plus 7 days at 18°C (shelf life). Respiration rates and ethylene emissions were measured every 3 days, while flesh firmness, weight loss and total polyphenol content were evaluated at the end of the storage period and during shelf life. The respiration rate of all the genetic materials was around 27.6 mg kg-1 h-1 of CO2 during the storage period, while ethylene emission was maintained below 100 µL kg-1 h-1 without differences among maturity stages and genetic materials. Fruits harvested at the M1 stage were 40-60% more firm than fruits harvested at the M2 stage. Genetic materials identified as 95 and 98 had the highest firmness results, with values of 150.1 and 145.1 N (M1), 112.6 and 90.4 N (M2) at harvest and 28.8 and 17.4 N (M1) and 17.2 and 15.4 N (M2) after 30 days at 5°C + 7 days at 20°C, respectively. Average weight loss at the end of storage (30+7) was 14.7%. Fruits identified as material 152 had the highest polyphenol content with values at harvest of 2,384.5 mg GAE 100 g-1 DW (M1) and 2,130.7 mg GAE 100 g-1 DW (M2). At the end of the storage period (30+7), total polyphenol contents decreased between 30-70% in the M1 stage and between 20-50% in the M2 stage. Materials 95, 98 and 152 are interesting for commercial production due to their firmness retention and their functional composition.
© 2018 International Society for Horticultural Science. All rights reserved MenosABSTRACT.
Feijoa (Acca sellowiana (Berg.) Burret) is one of the most popular native Uruguayan trees whose functional characteristics have attracted the interest for commercial cultivation. The aim of this work was to evaluate the postharvest behavior of six genetic materials, identified as 95, 97, 98, 152, 153 and 154 from the Facultad de Agronomía and Instituto Nacional de Investigación Agropecuaria (INIA, Uruguay) breeding program. Fruits harvested at two maturity stages (M1: not easily picked; M2: touch picking) were stored for 0, 15 and 30 days at 5°C and 95% relative humidity (RH) plus 7 days at 18°C (shelf life). Respiration rates and ethylene emissions were measured every 3 days, while flesh firmness, weight loss and total polyphenol content were evaluated at the end of the storage period and during shelf life. The respiration rate of all the genetic materials was around 27.6 mg kg-1 h-1 of CO2 during the storage period, while ethylene emission was maintained below 100 µL kg-1 h-1 without differences among maturity stages and genetic materials. Fruits harvested at the M1 stage were 40-60% more firm than fruits harvested at the M2 stage. Genetic materials identified as 95 and 98 had the highest firmness results, with values of 150.1 and 145.1 N (M1), 112.6 and 90.4 N (M2) at harvest and 28.8 and 17.4 N (M1) and 17.2 and 15.4 N (M2) after 30 days at 5°C + 7 days at 20°C, respectively. Average weight loss at the end of storage (30+7) was 14.7%. Fruits identified as mater... Presentar Todo |
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Palabras claves : |
Ethylene; Firmness; Functional quality; Respiration. |
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Thesagro : |
ACCA SELLOWIANA. |
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Asunto categoría : |
F01 Cultivo |
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Marc : |
LEADER 03073naa a2200277 a 4500
001 1060362
005 2019-11-12
008 2018 bl uuuu u00u1 u #d
020 $a978-94-62611-90-0
022 $a0567-7572 (print) / 2406-6168 (electronic)
024 7 $a10.17660/ActaHortic.2018.1194.12$2DOI
100 1 $aURRABURU, M.
245 $aPostharvest and functional behavior of some feijoa genetic materials. (Conference paper).$h[electronic resource]
260 $c2018
490 $a(Acta Horticulturae; 1194)
500 $aIn: Acta Horticulturae (ISHS) 1194: VIII International Postharvest Symposium: Enhancing Supply Chain and Consumer Benefits - Ethical and Technological Issues. Editors: F. Artés-Hernández, P.A. Gómez, E. Aguayo, F. Artés. Publication date: 4 april 2018.
520 $aABSTRACT. Feijoa (Acca sellowiana (Berg.) Burret) is one of the most popular native Uruguayan trees whose functional characteristics have attracted the interest for commercial cultivation. The aim of this work was to evaluate the postharvest behavior of six genetic materials, identified as 95, 97, 98, 152, 153 and 154 from the Facultad de Agronomía and Instituto Nacional de Investigación Agropecuaria (INIA, Uruguay) breeding program. Fruits harvested at two maturity stages (M1: not easily picked; M2: touch picking) were stored for 0, 15 and 30 days at 5°C and 95% relative humidity (RH) plus 7 days at 18°C (shelf life). Respiration rates and ethylene emissions were measured every 3 days, while flesh firmness, weight loss and total polyphenol content were evaluated at the end of the storage period and during shelf life. The respiration rate of all the genetic materials was around 27.6 mg kg-1 h-1 of CO2 during the storage period, while ethylene emission was maintained below 100 µL kg-1 h-1 without differences among maturity stages and genetic materials. Fruits harvested at the M1 stage were 40-60% more firm than fruits harvested at the M2 stage. Genetic materials identified as 95 and 98 had the highest firmness results, with values of 150.1 and 145.1 N (M1), 112.6 and 90.4 N (M2) at harvest and 28.8 and 17.4 N (M1) and 17.2 and 15.4 N (M2) after 30 days at 5°C + 7 days at 20°C, respectively. Average weight loss at the end of storage (30+7) was 14.7%. Fruits identified as material 152 had the highest polyphenol content with values at harvest of 2,384.5 mg GAE 100 g-1 DW (M1) and 2,130.7 mg GAE 100 g-1 DW (M2). At the end of the storage period (30+7), total polyphenol contents decreased between 30-70% in the M1 stage and between 20-50% in the M2 stage. Materials 95, 98 and 152 are interesting for commercial production due to their firmness retention and their functional composition. © 2018 International Society for Horticultural Science. All rights reserved
650 $aACCA SELLOWIANA
653 $aEthylene
653 $aFirmness
653 $aFunctional quality
653 $aRespiration
700 1 $aAGUAYO, E.
700 1 $aZOPPOLO, R.
700 1 $aSILVEIRA, A.C.
773 $tActa Horticulturae, 2018, no. 1194, pages 73-78.
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