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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
23/10/2002 |
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Data da última atualização: |
13/03/2017 |
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Autoria: |
ABREU, U. G. P.; McMANUS, C.; MORENO-BERNAL, F.E.; LARA, M. A. C.; SERENO, J. R. B. |
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Afiliação: |
Embrapa Pantanal (Corumbá, MS); UnB/FAV (Brasília, DF); IZ/SAA (Nova Odessa, SP). |
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Título: |
Genetic and environmental factors influencing birth and 205 day weights of Pantaneiro calves. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Archivos de Zootecnia, Cordoba, v.51, n.193/194, p.83-89, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
The present work analyses the growth of calves of the conservation nucleus for Pantanei-
ro cattle of EMBRAPA Pantanal. Birth and weaning data was available on 171 Pantaneiro calves born between 1996 and 1999. Calves were born from August to December, and
raised in the extensive system using native pastures at the Nhumirim farm, situate in the
Nhecolandia sub-region. The data was analyzed using GLM and CORR procedures of SAS and MTDFREML for analysis of variance components. Year of calving and calf sex was significant for all traits examined. Birth weight for males was 27.08 kg compared with
25.37 kg for females while weaning weights were 116.12 and 112.24 kg respectively. The year effect varied but the trend observed is that of an increase in both birth and weaning
weight with time. Month of birth did not affect birth nor uncorrected weaning weight, alth-
ough a trend was observed whereby calves born later in the season were heavier. With
205 day weight the effect of month was marked, with calves born in August being almost
25 kg heavier than those born in December (124.98 kg vs 99.23 kg) even after correc- tion. Heritability for birth weight is very low while repeatability is a little higher. This study
shows that there is little genetic variation available for use in selection for birth or weaning
traits in Pantaneiro cattle in Brazil. Controlled breeding policies whereby related individuals
are not mated to each other are important to increase the variation for these characteris-
tics. MenosThe present work analyses the growth of calves of the conservation nucleus for Pantanei-
ro cattle of EMBRAPA Pantanal. Birth and weaning data was available on 171 Pantaneiro calves born between 1996 and 1999. Calves were born from August to December, and
raised in the extensive system using native pastures at the Nhumirim farm, situate in the
Nhecolandia sub-region. The data was analyzed using GLM and CORR procedures of SAS and MTDFREML for analysis of variance components. Year of calving and calf sex was significant for all traits examined. Birth weight for males was 27.08 kg compared with
25.37 kg for females while weaning weights were 116.12 and 112.24 kg respectively. The year effect varied but the trend observed is that of an increase in both birth and weaning
weight with time. Month of birth did not affect birth nor uncorrected weaning weight, alth-
ough a trend was observed whereby calves born later in the season were heavier. With
205 day weight the effect of month was marked, with calves born in August being almost
25 kg heavier than those born in December (124.98 kg vs 99.23 kg) even after correc- tion. Heritability for birth weight is very low while repeatability is a little higher. This study
shows that there is little genetic variation available for use in selection for birth or weaning
traits in Pantaneiro cattle in Brazil. Controlled breeding policies whereby related individuals
are not mated to each other are important to increase the variation for these ... Mostrar Tudo |
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Palavras-Chave: |
Bezerro pantaneiro; Correlacao genetica; Efeito ambiental; Environmental effects; Genetic correlations; Herdabilidade; Herdability; Pantaneiro calves. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02298naa a2200265 a 4500
001 1810422
005 2017-03-13
008 2002 bl --- 0-- u #d
100 1 $aABREU, U. G. P.
245 $aGenetic and environmental factors influencing birth and 205 day weights of Pantaneiro calves.
260 $c2002
520 $aThe present work analyses the growth of calves of the conservation nucleus for Pantanei- ro cattle of EMBRAPA Pantanal. Birth and weaning data was available on 171 Pantaneiro calves born between 1996 and 1999. Calves were born from August to December, and raised in the extensive system using native pastures at the Nhumirim farm, situate in the Nhecolandia sub-region. The data was analyzed using GLM and CORR procedures of SAS and MTDFREML for analysis of variance components. Year of calving and calf sex was significant for all traits examined. Birth weight for males was 27.08 kg compared with 25.37 kg for females while weaning weights were 116.12 and 112.24 kg respectively. The year effect varied but the trend observed is that of an increase in both birth and weaning weight with time. Month of birth did not affect birth nor uncorrected weaning weight, alth- ough a trend was observed whereby calves born later in the season were heavier. With 205 day weight the effect of month was marked, with calves born in August being almost 25 kg heavier than those born in December (124.98 kg vs 99.23 kg) even after correc- tion. Heritability for birth weight is very low while repeatability is a little higher. This study shows that there is little genetic variation available for use in selection for birth or weaning traits in Pantaneiro cattle in Brazil. Controlled breeding policies whereby related individuals are not mated to each other are important to increase the variation for these characteris- tics.
653 $aBezerro pantaneiro
653 $aCorrelacao genetica
653 $aEfeito ambiental
653 $aEnvironmental effects
653 $aGenetic correlations
653 $aHerdabilidade
653 $aHerdability
653 $aPantaneiro calves
700 1 $aMcMANUS, C.
700 1 $aMORENO-BERNAL, F.E.
700 1 $aLARA, M. A. C.
700 1 $aSERENO, J. R. B.
773 $tArchivos de Zootecnia, Cordoba$gv.51, n.193/194, p.83-89, 2002.
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Registro original: |
Embrapa Pantanal (CPAP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
16/09/2020 |
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Data da última atualização: |
16/09/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MUNIZ, D. H. de F.; MALAQUIAS, J. V.; LIMA, J. E. F. W.; OLIVEIRA FILHO, E. C. de. |
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Afiliação: |
DAPHNE HELOISA DE FREITAS MUNIZ, CPAC; JUACI VITORIA MALAQUIAS, CPAC; JORGE ENOCH FURQUIM WERNECK LIMA, CPAC; EDUARDO CYRINO DE OLIVEIRA FILHO, CPAC. |
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Título: |
Proposal of an irrigation water quality index (IWQI) for regional use in the Federal District, Brazil |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Environmental Monitoring and Assessment, v. 192, n. 607, 2020. |
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Páginas: |
15 p. |
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Idioma: |
Português |
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Conteúdo: |
Abstract The present study aimed to propose a water quality index (WQI) for the Federal District, Brazil, as a management tool for water resources used in irrigation. Irrigated agriculture is a sector that has been growing in the region, with a consequent demand for quality water. One strategy for assessing water quality in rural areas is to adopt monitoring programs, which generate a large amount of data that often needs to be synthesized. The use of indexes is a way of organizing data in a synthetic and easy to understand format. Although initially formulated to assess the quality of drinking water, it is believed that a similar logic can easily be applied to assess the quality of irrigation water. Studies that evaluate the quality of water for irrigation are very common in arid or semi-arid regions, due to the problems of saline water in the soil and crops. On the other hand, the microbiological approach to water is poorly investigated, since contamination of crops can pose a risk to food security. In this work, three water bodies were selected in rural areas due to their preponderant use: irrigation. The monitoring occurred between May 2012 and April 2013 in 9 sampling points. For each sample collected, 22 physical, chemical, and biological parameters were established. Principal component analysis (PCA) was used in the evaluation and selection of water quality variables to compose the WQI. From PCA, it was possible to reduce the number of parameters from 16 to 6 main ones that reflect the water resources characteristics in the region, which were pH, electrical conductivity, total hardness, sodium absorption ratio, nitrate, and Escherichia coli. Of the five classes proposed for WQI, two points were classified as “very good.” The other sample points were classified as “good” and “average” for the irrigation practice. The adapted WQI proved to be a good tool in the management of the water quality of the three rivers, and it can be easily used to assess the quality of water for irrigation in the region. MenosAbstract The present study aimed to propose a water quality index (WQI) for the Federal District, Brazil, as a management tool for water resources used in irrigation. Irrigated agriculture is a sector that has been growing in the region, with a consequent demand for quality water. One strategy for assessing water quality in rural areas is to adopt monitoring programs, which generate a large amount of data that often needs to be synthesized. The use of indexes is a way of organizing data in a synthetic and easy to understand format. Although initially formulated to assess the quality of drinking water, it is believed that a similar logic can easily be applied to assess the quality of irrigation water. Studies that evaluate the quality of water for irrigation are very common in arid or semi-arid regions, due to the problems of saline water in the soil and crops. On the other hand, the microbiological approach to water is poorly investigated, since contamination of crops can pose a risk to food security. In this work, three water bodies were selected in rural areas due to their preponderant use: irrigation. The monitoring occurred between May 2012 and April 2013 in 9 sampling points. For each sample collected, 22 physical, chemical, and biological parameters were established. Principal component analysis (PCA) was used in the evaluation and selection of water quality variables to compose the WQI. From PCA, it was possible to reduce the number of parameters from 16 to 6 main one... Mostrar Tudo |
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Palavras-Chave: |
Ferramenta de gestão; Índice de qualidade. |
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Thesagro: |
Irrigação; Recurso Hídrico. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02731naa a2200217 a 4500
001 2124956
005 2020-09-16
008 2020 bl uuuu u00u1 u #d
100 1 $aMUNIZ, D. H. de F.
245 $aProposal of an irrigation water quality index (IWQI) for regional use in the Federal District, Brazil$h[electronic resource]
260 $c2020
300 $a15 p.
520 $aAbstract The present study aimed to propose a water quality index (WQI) for the Federal District, Brazil, as a management tool for water resources used in irrigation. Irrigated agriculture is a sector that has been growing in the region, with a consequent demand for quality water. One strategy for assessing water quality in rural areas is to adopt monitoring programs, which generate a large amount of data that often needs to be synthesized. The use of indexes is a way of organizing data in a synthetic and easy to understand format. Although initially formulated to assess the quality of drinking water, it is believed that a similar logic can easily be applied to assess the quality of irrigation water. Studies that evaluate the quality of water for irrigation are very common in arid or semi-arid regions, due to the problems of saline water in the soil and crops. On the other hand, the microbiological approach to water is poorly investigated, since contamination of crops can pose a risk to food security. In this work, three water bodies were selected in rural areas due to their preponderant use: irrigation. The monitoring occurred between May 2012 and April 2013 in 9 sampling points. For each sample collected, 22 physical, chemical, and biological parameters were established. Principal component analysis (PCA) was used in the evaluation and selection of water quality variables to compose the WQI. From PCA, it was possible to reduce the number of parameters from 16 to 6 main ones that reflect the water resources characteristics in the region, which were pH, electrical conductivity, total hardness, sodium absorption ratio, nitrate, and Escherichia coli. Of the five classes proposed for WQI, two points were classified as “very good.” The other sample points were classified as “good” and “average” for the irrigation practice. The adapted WQI proved to be a good tool in the management of the water quality of the three rivers, and it can be easily used to assess the quality of water for irrigation in the region.
650 $aIrrigação
650 $aRecurso Hídrico
653 $aFerramenta de gestão
653 $aÍndice de qualidade
700 1 $aMALAQUIAS, J. V.
700 1 $aLIMA, J. E. F. W.
700 1 $aOLIVEIRA FILHO, E. C. de
773 $tEnvironmental Monitoring and Assessment$gv. 192, n. 607, 2020.
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