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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 : |
12/09/2014 |
Actualizado : |
27/09/2018 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
BAEZA, S.; LEZAMA, F.; PIÑEIRO, G.; ALTESOR, A.; PARUELO, J.M. |
Afiliación : |
FELIPE LEZAMA HUERTA, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay. |
Título : |
Spatial variability of above-ground net primary production in Uruguayan grasslands: A remote sensing approach. |
Fecha de publicación : |
2010 |
Fuente / Imprenta : |
Applied Vegetation Science, 2010, v. 13, no. 1 p. 72-85. |
ISSN : |
1654-109X |
DOI : |
10.1111/j.1654-109X.2009.01051.x |
Idioma : |
Inglés |
Notas : |
Article history: Received 4 November 2008; accepted 16 July 2009. Published in 2010. |
Contenido : |
Abstract:
Question: How does above-ground net primary production (ANPP) differ (estimated from remotely sensed data) among vegetation units in sub-humid temperate grasslands?
Location: Centre-north Uruguay.
Methods: A vegetation map of the study area was generated from LANDSAT imagery and the landscape configuration described. The functional heterogeneity of mapping units was analysed in terms of the fraction of photosynthetically active radiation absorbed by green vegetation (fPAR), calculated from the normalized difference vegetation index (NDVI) images provided by the moderate resolution imaging spectroradiometer (MODIS) sensor. Finally, the ANPP of each grassland class was estimated using NDVI and climatic data.
Results: Supervised classification presented a good overall accuracy and moderate to good average accuracy for grassland classes. Meso-xerophytic grasslands
occupied 45% of the area, Meso-hydrophytic grasslands 43% and Lithophytic steppes 6%. The landscape was shaped by a matrix of large, unfragmented patches of Meso-xerophytic and Meso-hydrophytic grasslands. The region presented the lowest anthropic fragmentation degree reported for the Rio de la Plata grasslands. All grassland units showed bimodal annual fPAR seasonality, with spring and autumn peaks. Meso-hydrophytic grasslands showed a radiation interception 10% higher than the other units. On an annual basis, Meso-hydrophytic grasslands produced 3800 kg dry matter (DM) ha 1 yr 1 and Meso-xerophytic grasslands and ithophytic
steppes around 3400 kg DM ha 1 yr 1 . Mesoxerophytic grasslands had the largest spatial variation during most of the year. The ANPP temporal variation was higher than the fPAR variability.
Conclusions: Our results provide valuable information for grazing management (identifying spatial and temporal variations of ANPP) and grassland conservation (identifying the spatial distribution of vegetation units). MenosAbstract:
Question: How does above-ground net primary production (ANPP) differ (estimated from remotely sensed data) among vegetation units in sub-humid temperate grasslands?
Location: Centre-north Uruguay.
Methods: A vegetation map of the study area was generated from LANDSAT imagery and the landscape configuration described. The functional heterogeneity of mapping units was analysed in terms of the fraction of photosynthetically active radiation absorbed by green vegetation (fPAR), calculated from the normalized difference vegetation index (NDVI) images provided by the moderate resolution imaging spectroradiometer (MODIS) sensor. Finally, the ANPP of each grassland class was estimated using NDVI and climatic data.
Results: Supervised classification presented a good overall accuracy and moderate to good average accuracy for grassland classes. Meso-xerophytic grasslands
occupied 45% of the area, Meso-hydrophytic grasslands 43% and Lithophytic steppes 6%. The landscape was shaped by a matrix of large, unfragmented patches of Meso-xerophytic and Meso-hydrophytic grasslands. The region presented the lowest anthropic fragmentation degree reported for the Rio de la Plata grasslands. All grassland units showed bimodal annual fPAR seasonality, with spring and autumn peaks. Meso-hydrophytic grasslands showed a radiation interception 10% higher than the other units. On an annual basis, Meso-hydrophytic grasslands produced 3800 kg dry matter (DM) ha 1 yr 1 and Meso-xerophytic grassl... Presentar Todo |
Palabras claves : |
LAND-COVE CLASSIFICATION; NATIVE GRASS-LANDS; NDVI; NORMALIZED DIFFERENCE VETETATION INDEX (NDVI); RADIATION-USE EFFICIENCY; RIO DE LA PLATA GRASSLANDS. |
Thesagro : |
ESPECIES; IDENTIFICACION; PASTIZAL NATURAL; SISTEMAS GEOGRAFICOS; URUGUAY. |
Asunto categoría : |
F70 Taxonomía y geografía de las plantas |
Marc : |
LEADER 03025naa a2200337 a 4500 001 1050200 005 2018-09-27 008 2010 bl uuuu u00u1 u #d 022 $a1654-109X 024 7 $a10.1111/j.1654-109X.2009.01051.x$2DOI 100 1 $aBAEZA, S. 245 $aSpatial variability of above-ground net primary production in Uruguayan grasslands$bA remote sensing approach.$h[electronic resource] 260 $c2010 500 $aArticle history: Received 4 November 2008; accepted 16 July 2009. Published in 2010. 520 $aAbstract: Question: How does above-ground net primary production (ANPP) differ (estimated from remotely sensed data) among vegetation units in sub-humid temperate grasslands? Location: Centre-north Uruguay. Methods: A vegetation map of the study area was generated from LANDSAT imagery and the landscape configuration described. The functional heterogeneity of mapping units was analysed in terms of the fraction of photosynthetically active radiation absorbed by green vegetation (fPAR), calculated from the normalized difference vegetation index (NDVI) images provided by the moderate resolution imaging spectroradiometer (MODIS) sensor. Finally, the ANPP of each grassland class was estimated using NDVI and climatic data. Results: Supervised classification presented a good overall accuracy and moderate to good average accuracy for grassland classes. Meso-xerophytic grasslands occupied 45% of the area, Meso-hydrophytic grasslands 43% and Lithophytic steppes 6%. The landscape was shaped by a matrix of large, unfragmented patches of Meso-xerophytic and Meso-hydrophytic grasslands. The region presented the lowest anthropic fragmentation degree reported for the Rio de la Plata grasslands. All grassland units showed bimodal annual fPAR seasonality, with spring and autumn peaks. Meso-hydrophytic grasslands showed a radiation interception 10% higher than the other units. On an annual basis, Meso-hydrophytic grasslands produced 3800 kg dry matter (DM) ha 1 yr 1 and Meso-xerophytic grasslands and ithophytic steppes around 3400 kg DM ha 1 yr 1 . Mesoxerophytic grasslands had the largest spatial variation during most of the year. The ANPP temporal variation was higher than the fPAR variability. Conclusions: Our results provide valuable information for grazing management (identifying spatial and temporal variations of ANPP) and grassland conservation (identifying the spatial distribution of vegetation units). 650 $aESPECIES 650 $aIDENTIFICACION 650 $aPASTIZAL NATURAL 650 $aSISTEMAS GEOGRAFICOS 650 $aURUGUAY 653 $aLAND-COVE CLASSIFICATION 653 $aNATIVE GRASS-LANDS 653 $aNDVI 653 $aNORMALIZED DIFFERENCE VETETATION INDEX (NDVI) 653 $aRADIATION-USE EFFICIENCY 653 $aRIO DE LA PLATA GRASSLANDS 700 1 $aLEZAMA, F. 700 1 $aPIÑEIRO, G. 700 1 $aALTESOR, A. 700 1 $aPARUELO, J.M. 773 $tApplied Vegetation Science, 2010$gv. 13, no. 1 p. 72-85.
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| Acceso al texto completo restringido a Biblioteca INIA La Estanzuela. Por información adicional contacte bib_le@inia.org.uy. |
Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha actual : |
08/11/2018 |
Actualizado : |
11/10/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
Internacional - -- |
Autor : |
SUAREZ, V.H.; MICHELOUD, J.F.; ARÁOZ, V.; MARTÍNEZ, G.M.; ROSA, D.E.; MATTIOLI, G.A. |
Afiliación : |
VICTOR H. SUAREZ, INTA, Área de Investigación en Salud Animal- IIACS-CIAP, EEA Salta, RN 68, km 172, CC 228, 4403, Cerrillos, Salta, Argentina.; JUAN F. MICHELOUD, INTA, Área de Investigación en Salud Animal- IIACS-CIAP, EEA Salta Cerrillos Argentina.; VIRGINIA ARÁOZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GABRIELA M. MARTÍNEZ, INTA, Área de Investigación en Salud Animal- IIACS-CIAP, EEA Salta Cerrillos Argentina.; DIANA E ROSA, Lab. de Nutrición Mineral, F. Cs. Veterinarias Universidad Nacional de La Plata Buenos Aires Argentina.; GUILLERMO A. MATTIOLI, Lab. de Nutrición Mineral, F. Cs. Veterinarias Universidad Nacional de La Plata Buenos Aires Argentina. |
Título : |
Effect of gastrointestinal nematodes on serum copper and phosphorus of growing beef calves in northwestern Argentina. |
Fecha de publicación : |
2018 |
Fuente / Imprenta : |
Tropical Animal Health and Production , 23 oct. 2018. |
ISSN : |
Online ISSN 1573-7438 |
DOI : |
10.1007/s11250-018-1729-x |
Idioma : |
Inglés |
Notas : |
Article history: Received: 27 July 2018//Accepted: 12 October 2018. |
Contenido : |
Abstract:
The aim of this work was to study the effect of gastrointestinal nematodes (GINs) on copper (Cu) and phosphorus (P) in blood of beef cattle in two ranches (R1 and R2) located in northwestern Argentina. In 2015-2016 (R1) and 2016-2017 (R2), in each ranch, 22 weaned female calves were divided into two groups: calves treated systematically with 200 mcg/kg moxidectin every 45-50 days (TG) and untreated calves (UTG). The following parameters were measured: number of fecal eggs (epg), fecal cultures, serum Cu and P levels, and live weight gain (LWG). Differences between groups were compared using analysis of variance and Tukey test. GIN infections in both ranches were subclinical and moderate, showing the highest epg (R1?=?907?±?754; R2?=?1049?±?1040) by mid-winter. Epg values of TG groups were always negligible (>?93% of moxidectin efficacy). The dominant nematode genera were Cooperia and Haemonchus. The average serum Cu values (?g/dl) indicated low (R1?=?49.7?±?18) and severe (R2?=?27.2?±?14) deficiency. The effect of treatments was evident in both ranches from late winter, with TG showing significantly (p?0.01) higher serum levels in winter, spring, and early autumn (R1?=?65.1, 50.9, and 60.3; R2?=?48.0, 25.7, and 22.4) than UTG (R1?=?44.3, 33.9, and 32.9; R2?=?25.5, 18.2, and 16.4). There were no differences in serum P levels between groups. LWG of TG increased significantly (p?0.008) (27.2% in R1 and 38.6% in R2), with respect to those of UTG. This study showed a negative effect of GIN on serum Cu values in moderately infected growing calves. MenosAbstract:
The aim of this work was to study the effect of gastrointestinal nematodes (GINs) on copper (Cu) and phosphorus (P) in blood of beef cattle in two ranches (R1 and R2) located in northwestern Argentina. In 2015-2016 (R1) and 2016-2017 (R2), in each ranch, 22 weaned female calves were divided into two groups: calves treated systematically with 200 mcg/kg moxidectin every 45-50 days (TG) and untreated calves (UTG). The following parameters were measured: number of fecal eggs (epg), fecal cultures, serum Cu and P levels, and live weight gain (LWG). Differences between groups were compared using analysis of variance and Tukey test. GIN infections in both ranches were subclinical and moderate, showing the highest epg (R1?=?907?±?754; R2?=?1049?±?1040) by mid-winter. Epg values of TG groups were always negligible (>?93% of moxidectin efficacy). The dominant nematode genera were Cooperia and Haemonchus. The average serum Cu values (?g/dl) indicated low (R1?=?49.7?±?18) and severe (R2?=?27.2?±?14) deficiency. The effect of treatments was evident in both ranches from late winter, with TG showing significantly (p?0.01) higher serum levels in winter, spring, and early autumn (R1?=?65.1, 50.9, and 60.3; R2?=?48.0, 25.7, and 22.4) than UTG (R1?=?44.3, 33.9, and 32.9; R2?=?25.5, 18.2, and 16.4). There were no differences in serum P levels between groups. LWG of TG increased significantly (p?0.008) (27.2% in R1 and 38.6% in R2), with respect to those of UTG. This study showed ... Presentar Todo |
Palabras claves : |
CATTLE; GASTROINTESTINAL NEMATODES; NEMATODOS GASTROINTESTINALES; SALUD ANIMAL; SERUM COPPER; SERUM PHOSPHORUS; TERNEROS. |
Thesagro : |
ARGENTINA. |
Asunto categoría : |
L73 Enfermedades de los animales |
Marc : |
LEADER 02572naa a2200313 a 4500 001 1059287 005 2019-10-11 008 2018 bl uuuu u00u1 u #d 022 $aOnline ISSN 1573-7438 024 7 $a10.1007/s11250-018-1729-x$2DOI 100 1 $aSUAREZ, V.H. 245 $aEffect of gastrointestinal nematodes on serum copper and phosphorus of growing beef calves in northwestern Argentina.$h[electronic resource] 260 $c2018 500 $aArticle history: Received: 27 July 2018//Accepted: 12 October 2018. 520 $aAbstract: The aim of this work was to study the effect of gastrointestinal nematodes (GINs) on copper (Cu) and phosphorus (P) in blood of beef cattle in two ranches (R1 and R2) located in northwestern Argentina. In 2015-2016 (R1) and 2016-2017 (R2), in each ranch, 22 weaned female calves were divided into two groups: calves treated systematically with 200 mcg/kg moxidectin every 45-50 days (TG) and untreated calves (UTG). The following parameters were measured: number of fecal eggs (epg), fecal cultures, serum Cu and P levels, and live weight gain (LWG). Differences between groups were compared using analysis of variance and Tukey test. GIN infections in both ranches were subclinical and moderate, showing the highest epg (R1?=?907?±?754; R2?=?1049?±?1040) by mid-winter. Epg values of TG groups were always negligible (>?93% of moxidectin efficacy). The dominant nematode genera were Cooperia and Haemonchus. The average serum Cu values (?g/dl) indicated low (R1?=?49.7?±?18) and severe (R2?=?27.2?±?14) deficiency. The effect of treatments was evident in both ranches from late winter, with TG showing significantly (p?0.01) higher serum levels in winter, spring, and early autumn (R1?=?65.1, 50.9, and 60.3; R2?=?48.0, 25.7, and 22.4) than UTG (R1?=?44.3, 33.9, and 32.9; R2?=?25.5, 18.2, and 16.4). There were no differences in serum P levels between groups. LWG of TG increased significantly (p?0.008) (27.2% in R1 and 38.6% in R2), with respect to those of UTG. This study showed a negative effect of GIN on serum Cu values in moderately infected growing calves. 650 $aARGENTINA 653 $aCATTLE 653 $aGASTROINTESTINAL NEMATODES 653 $aNEMATODOS GASTROINTESTINALES 653 $aSALUD ANIMAL 653 $aSERUM COPPER 653 $aSERUM PHOSPHORUS 653 $aTERNEROS 700 1 $aMICHELOUD, J.F. 700 1 $aARÁOZ, V. 700 1 $aMARTÍNEZ, G.M. 700 1 $aROSA, D.E. 700 1 $aMATTIOLI, G.A. 773 $tTropical Animal Health and Production , 23 oct. 2018.
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