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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
11/06/2015 |
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Data da última atualização: |
01/02/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SOARES, I. D.; NOGUEIRA, A. C.; KALIL FILHO, A. N.; MIRANDA, R. O. V.; EBLING, A. A. |
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Afiliação: |
Izabele Domingues Soares, UFPR; Antonio Carlos Nogueira, UFPR; ANTONIO NASCIM KALIL FILHO, CNPF; Rodrigo O. V. Miranda, UFPR; Ângelo Augusto Ebling, UFPR. |
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Título: |
Germination behavior of Psidium rufum Dc. seeds at different temperatures, substrates and conditions of light. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Australian Journal of Basic and Applied Sciences, v. 9, n. 7, p. 564-570, Apr. 2015. |
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Idioma: |
Inglês |
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Conteúdo: |
The performance of the germination of each species varies at different temperatures, substrates and sometimes light conditions. Therefore, in the conduct of germination tests in laboratories, the knowledge the influence of these components on the germination of each species is of fundamental importance. Psidium rufum DC. is a species native to Brazil, belonging to the family Myrtaceae, characteristic of Biomes Cerrado and Atlantic Forest. It is a initial secondary species, including used for the restoration of degraded areas, with high survival rates. Knowledge of P. rufum are incipient and literature are rare information about the species and the performance of your germination process. Objective: Therefore, this study aimed to verify the germination behavior of P. rufum seeds at different temperatures, substrates and conditions of presence and absence of light. Results: Analysis of variance revealed a significant interaction (P <0.05) between the substrate and temperature variables, indicating that the seed germination of P. rufum laboratory depends on the temperature and the type of substrate, except for germination percentage in which the effects of the factors studied proved to be independent. When placed in the substrate blotter paper 25 °C, the seeds had higher germination percentage, higher speed of germination, smaller average time and higher average speed of germination. The maximum synchronization of germination (U = 0) in P. rufum was observed of temperature 30 °C, the roll paper substrate, however, was the treatment had the lowest percentage of germination. Considering the distributions of the frequency in the germination of P. rufum, such isothermal patterns used (20, 25 and 30 °C) differ in the number, location and frequency of fashions, where all distributions showed character multimodal. The germination of P. rufum was lower in the dark, revealing preferred positive photoblastic. Conclusion: The best results for the germination test were obtained with blotter paper substrate at 25 °C. The light influence the germination of P. rufum, with the species considered as the preferred positive photoblastic. MenosThe performance of the germination of each species varies at different temperatures, substrates and sometimes light conditions. Therefore, in the conduct of germination tests in laboratories, the knowledge the influence of these components on the germination of each species is of fundamental importance. Psidium rufum DC. is a species native to Brazil, belonging to the family Myrtaceae, characteristic of Biomes Cerrado and Atlantic Forest. It is a initial secondary species, including used for the restoration of degraded areas, with high survival rates. Knowledge of P. rufum are incipient and literature are rare information about the species and the performance of your germination process. Objective: Therefore, this study aimed to verify the germination behavior of P. rufum seeds at different temperatures, substrates and conditions of presence and absence of light. Results: Analysis of variance revealed a significant interaction (P <0.05) between the substrate and temperature variables, indicating that the seed germination of P. rufum laboratory depends on the temperature and the type of substrate, except for germination percentage in which the effects of the factors studied proved to be independent. When placed in the substrate blotter paper 25 °C, the seeds had higher germination percentage, higher speed of germination, smaller average time and higher average speed of germination. The maximum synchronization of germination (U = 0) in P. rufum was observed of temperature 30 °... Mostrar Tudo |
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Palavras-Chave: |
Conditions of light; Forest seeds; Luz; Psidium rufum; Substrate; Substrato. |
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Thesagro: |
Germinação; Semente; Temperatura. |
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Thesaurus Nal: |
germination; temperature. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03035naa a2200301 a 4500
001 2017473
005 2016-02-01
008 2015 bl uuuu u00u1 u #d
100 1 $aSOARES, I. D.
245 $aGermination behavior of Psidium rufum Dc. seeds at different temperatures, substrates and conditions of light.$h[electronic resource]
260 $c2015
520 $aThe performance of the germination of each species varies at different temperatures, substrates and sometimes light conditions. Therefore, in the conduct of germination tests in laboratories, the knowledge the influence of these components on the germination of each species is of fundamental importance. Psidium rufum DC. is a species native to Brazil, belonging to the family Myrtaceae, characteristic of Biomes Cerrado and Atlantic Forest. It is a initial secondary species, including used for the restoration of degraded areas, with high survival rates. Knowledge of P. rufum are incipient and literature are rare information about the species and the performance of your germination process. Objective: Therefore, this study aimed to verify the germination behavior of P. rufum seeds at different temperatures, substrates and conditions of presence and absence of light. Results: Analysis of variance revealed a significant interaction (P <0.05) between the substrate and temperature variables, indicating that the seed germination of P. rufum laboratory depends on the temperature and the type of substrate, except for germination percentage in which the effects of the factors studied proved to be independent. When placed in the substrate blotter paper 25 °C, the seeds had higher germination percentage, higher speed of germination, smaller average time and higher average speed of germination. The maximum synchronization of germination (U = 0) in P. rufum was observed of temperature 30 °C, the roll paper substrate, however, was the treatment had the lowest percentage of germination. Considering the distributions of the frequency in the germination of P. rufum, such isothermal patterns used (20, 25 and 30 °C) differ in the number, location and frequency of fashions, where all distributions showed character multimodal. The germination of P. rufum was lower in the dark, revealing preferred positive photoblastic. Conclusion: The best results for the germination test were obtained with blotter paper substrate at 25 °C. The light influence the germination of P. rufum, with the species considered as the preferred positive photoblastic.
650 $agermination
650 $atemperature
650 $aGerminação
650 $aSemente
650 $aTemperatura
653 $aConditions of light
653 $aForest seeds
653 $aLuz
653 $aPsidium rufum
653 $aSubstrate
653 $aSubstrato
700 1 $aNOGUEIRA, A. C.
700 1 $aKALIL FILHO, A. N.
700 1 $aMIRANDA, R. O. V.
700 1 $aEBLING, A. A.
773 $tAustralian Journal of Basic and Applied Sciences$gv. 9, n. 7, p. 564-570, Apr. 2015.
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Registro original: |
Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
01/09/2017 |
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Data da última atualização: |
05/12/2017 |
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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: |
PALHARES, J. C. P.; MORELLI, M.; COSTA JUNIOR, C. |
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Afiliação: |
JULIO CESAR PASCALE PALHARES, CPPSE; Marcela Morelli, FMVZ/USP; Ciniro Costa Junior, Instituto de Manejo e Certificação Florestal e Agrícola. |
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Título: |
Impact of roughage-concentrate ratio on the water footprints of beef feedlots. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Agricultural Systems, v. 155, p. 126-135, 2017. |
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ISSN: |
0308-521X |
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DOI: |
https://doi.org/10.1016/j.agsy.2017.04.009 |
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Idioma: |
Inglês |
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Conteúdo: |
The aim of this study was to determine the water footprint of beef feedlots up to the farm gate and evaluate the impact of roughage-concentrate ratio on the green water footprint. The study purpose was to provide strategic insights about nutritional management and water used that have a positive impact reducing water demand and increasing water efficiency. A regional bottom-up approach of the beef feedlot production was applied and water footprint methodology was used as the primary method. We included green and blue volumetric water footprint. Sensitivity assessment was done to explore differences in agricultural performance. Total water footprint ranged from 1935 to 9673 m3 kg− 1 of meat. The results are demonstrating the variability in water footprint that can exist from farm to farm. Green water represented on average 84.5% and blue water 15.4% of the footprint value. The farms with larger amounts of concentrate in the diet had high footprint values and the differences in feed composition have a significant effect on the water footprint. The average water footprint of the current crop yield was 5814 L kg− 1 of meat. With a reduction of 25% in the current crop yields, it was 7.416 L kg− 1 of meat and with an increase of 25% in the current crop yields, 4677 L kg− 1 of meat. These results show that increasing agricultural productivity has positive impacts on reducing the water footprint. The results show that the water footprint values of feedlots are determined largely by the type of animal diet and by performance indicators of the animals. The roughage-concentrate ratio and type of roughage are the nutritional aspects that most significantly influence the footprint values. This study supports the recommendation that beef feedlots should place emphasis on maximizing the use of roughage, because this could decrease the pressure on fresh water resources. MenosThe aim of this study was to determine the water footprint of beef feedlots up to the farm gate and evaluate the impact of roughage-concentrate ratio on the green water footprint. The study purpose was to provide strategic insights about nutritional management and water used that have a positive impact reducing water demand and increasing water efficiency. A regional bottom-up approach of the beef feedlot production was applied and water footprint methodology was used as the primary method. We included green and blue volumetric water footprint. Sensitivity assessment was done to explore differences in agricultural performance. Total water footprint ranged from 1935 to 9673 m3 kg− 1 of meat. The results are demonstrating the variability in water footprint that can exist from farm to farm. Green water represented on average 84.5% and blue water 15.4% of the footprint value. The farms with larger amounts of concentrate in the diet had high footprint values and the differences in feed composition have a significant effect on the water footprint. The average water footprint of the current crop yield was 5814 L kg− 1 of meat. With a reduction of 25% in the current crop yields, it was 7.416 L kg− 1 of meat and with an increase of 25% in the current crop yields, 4677 L kg− 1 of meat. These results show that increasing agricultural productivity has positive impacts on reducing the water footprint. The results show that the water footprint values of feedlots ar... Mostrar Tudo |
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Palavras-Chave: |
Blue water; Green water. |
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Thesaurus NAL: |
Nellore. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02517naa a2200205 a 4500
001 2074819
005 2017-12-05
008 2017 bl uuuu u00u1 u #d
022 $a0308-521X
024 7 $ahttps://doi.org/10.1016/j.agsy.2017.04.009$2DOI
100 1 $aPALHARES, J. C. P.
245 $aImpact of roughage-concentrate ratio on the water footprints of beef feedlots.$h[electronic resource]
260 $c2017
520 $aThe aim of this study was to determine the water footprint of beef feedlots up to the farm gate and evaluate the impact of roughage-concentrate ratio on the green water footprint. The study purpose was to provide strategic insights about nutritional management and water used that have a positive impact reducing water demand and increasing water efficiency. A regional bottom-up approach of the beef feedlot production was applied and water footprint methodology was used as the primary method. We included green and blue volumetric water footprint. Sensitivity assessment was done to explore differences in agricultural performance. Total water footprint ranged from 1935 to 9673 m3 kg− 1 of meat. The results are demonstrating the variability in water footprint that can exist from farm to farm. Green water represented on average 84.5% and blue water 15.4% of the footprint value. The farms with larger amounts of concentrate in the diet had high footprint values and the differences in feed composition have a significant effect on the water footprint. The average water footprint of the current crop yield was 5814 L kg− 1 of meat. With a reduction of 25% in the current crop yields, it was 7.416 L kg− 1 of meat and with an increase of 25% in the current crop yields, 4677 L kg− 1 of meat. These results show that increasing agricultural productivity has positive impacts on reducing the water footprint. The results show that the water footprint values of feedlots are determined largely by the type of animal diet and by performance indicators of the animals. The roughage-concentrate ratio and type of roughage are the nutritional aspects that most significantly influence the footprint values. This study supports the recommendation that beef feedlots should place emphasis on maximizing the use of roughage, because this could decrease the pressure on fresh water resources.
650 $aNellore
653 $aBlue water
653 $aGreen water
700 1 $aMORELLI, M.
700 1 $aCOSTA JUNIOR, C.
773 $tAgricultural Systems$gv. 155, p. 126-135, 2017.
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