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Registro Completo |
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Biblioteca(s): |
Embrapa Territorial. |
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Data corrente: |
19/12/2014 |
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Data da última atualização: |
19/12/2014 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
NOGUEIRA, S. F.; MACEDO, M. C. M.; POCCARD-CHAPUIS, R.; SILVA, G. B. S. da; VICTORIA, D. de C.; ANDRADE, R. G.; AGUIAR, D. A. DE.; BOLFE, E. L. |
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Afiliação: |
SANDRA FURLAN NOGUEIRA, CNPM; MANUEL CLAUDIO MOTTA MACEDO, CNPGC; RENÉ POCCARD-CHAPUIS, CIRAD; GUSTAVO BAYMA SIQUEIRA DA SILVA, CNPM; DANIEL DE CASTRO VICTORIA, CNPM; RICARDO GUIMARAES ANDRADE, CNPM; DANIEL A. DE AGUIAR, AGROSATÉLITE; EDSON LUIS BOLFE, CNPM. |
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Título: |
Geotechnologies for monitoring pasture degradation levels in Brazil. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 51., 2014, Barra dos Coqueiros. A produção animal frente às mudanças climáticas e tecnológicas - anais. Barra dos coqueiros: Sociedade Brasileira de Zootecnia, 2014. |
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Páginas: |
1 p. |
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Idioma: |
Inglês |
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Conteúdo: |
Extensive livestock represents around 93% of cattle production in Brazil and pasture is its main food source. For this reason, the sector considers pasture degradation an important problem, being responsible for economic and environmental losses. Several sources indicate that more than 60% of the 160 million hectare of Brazilian pastures shows some level of degradation. The need for precise information about degraded pasture levels, localization and quantities leaded to the GEODEGRADE project. More details and results can be found at the website: http://www.geodegrade.cnpm.embrapa.br. |
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Palavras-Chave: |
Geotechnologies; MODIS; SPOT vegetation. |
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Thesaurus Nal: |
Degradation; Pastures; Remote sensing. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/114164/1/4291.pdf
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Marc: |
LEADER 01538nam a2200277 a 4500
001 2003339
005 2014-12-19
008 2014 bl uuuu u00u1 u #d
100 1 $aNOGUEIRA, S. F.
245 $aGeotechnologies for monitoring pasture degradation levels in Brazil.$h[electronic resource]
260 $aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 51., 2014, Barra dos Coqueiros. A produção animal frente às mudanças climáticas e tecnológicas - anais. Barra dos coqueiros: Sociedade Brasileira de Zootecnia$c2014
300 $a1 p.
520 $aExtensive livestock represents around 93% of cattle production in Brazil and pasture is its main food source. For this reason, the sector considers pasture degradation an important problem, being responsible for economic and environmental losses. Several sources indicate that more than 60% of the 160 million hectare of Brazilian pastures shows some level of degradation. The need for precise information about degraded pasture levels, localization and quantities leaded to the GEODEGRADE project. More details and results can be found at the website: http://www.geodegrade.cnpm.embrapa.br.
650 $aDegradation
650 $aPastures
650 $aRemote sensing
653 $aGeotechnologies
653 $aMODIS
653 $aSPOT vegetation
700 1 $aMACEDO, M. C. M.
700 1 $aPOCCARD-CHAPUIS, R.
700 1 $aSILVA, G. B. S. da
700 1 $aVICTORIA, D. de C.
700 1 $aANDRADE, R. G.
700 1 $aAGUIAR, D. A. DE.
700 1 $aBOLFE, E. L.
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Registro original: |
Embrapa Territorial (CNPM) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
22/06/2020 |
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Data da última atualização: |
22/06/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
BARROS, B. G. de F.; FREITAS, A. D. S. de; TABOSA, J. N.; LYRA, M. do C. C. P. de; MERGULHÃO, A. C. do E. S.; SILVA, A. F. da; OLIVEIRA, W. da S.; FERNANDES JUNIOR, P. I.; SAMPAIO, E. V. de S. B. |
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Afiliação: |
Benaia Gonçalves de Franca Barros; Ana Dolores Santiago de Freitas; Jose Nildo Tabosa; Maria do Carmo Catanho Pereira de Lyra; Adalia Cavalcanti do Espirito Santo Mergulhão; Aleksandro Ferreira da Silva; Wagner da Silva Oliveira; PAULO IVAN FERNANDES JUNIOR, CPATSA; Everardo Valadares de Sá Barretto Sampaio. |
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Título: |
Biological nitrogen fixation in field-grown sorghum under different edaphoclimatic conditions is confirmed by N isotopic signatures. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Nutrient Cycling in Agroecosystems, v. 117, p. 93-101, 2020. |
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DOI: |
https://doi.org/10.1007/s10705-020-10051-3 |
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Idioma: |
Inglês |
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Conteúdo: |
The association between sorghum and N2-fixing bacteria has been assessed only under limited conditions. We investigated biological nitrogen fixation (BNF) in situ in fifteen sorghum genotypes with dry or succulent culm types under five edaphoclimatic conditions. One randomized block experiment was established in each of five locations, from the humid to the semiarid regions of Pernambuco state, Brazil. BNF was estimated using the 15N natural abundance method by comparing the average d15N value of each sorghum genotype with those of the reference species. High levels of productivity, up to 22 Mg shoot biomass ha-1 in the 3-month cycle, were obtained where rainfall was high, and up to 5 Mg ha-1 was obtained under low rainfall. The nitrogen contents showed a similar pattern as biomass production, and the genotypes with the highest productivity accumulated from 200 to 300 kg N ha-1. BNF ranged from 55 to 78% of plant N in one location and from 36 to 56% in another location, but BNF did not occur in the other three locations. Although the factors that blocked effective symbiosis were not determined, symbiosis was not influenced by P or K availability. The proportion of N2 fixation was similar in the grainproducing, dry culm genotypes and in the sugar-rich, succulent culm genotypes. The sorghum genotypes fixed N2, reaching up to 218 kg ha-1 N, without inoculation with diazotrophs. Therefore, sorghum has a high potential to fix atmospheric N2, but the factors that block N2 fixation must be identified for crop management planning. MenosThe association between sorghum and N2-fixing bacteria has been assessed only under limited conditions. We investigated biological nitrogen fixation (BNF) in situ in fifteen sorghum genotypes with dry or succulent culm types under five edaphoclimatic conditions. One randomized block experiment was established in each of five locations, from the humid to the semiarid regions of Pernambuco state, Brazil. BNF was estimated using the 15N natural abundance method by comparing the average d15N value of each sorghum genotype with those of the reference species. High levels of productivity, up to 22 Mg shoot biomass ha-1 in the 3-month cycle, were obtained where rainfall was high, and up to 5 Mg ha-1 was obtained under low rainfall. The nitrogen contents showed a similar pattern as biomass production, and the genotypes with the highest productivity accumulated from 200 to 300 kg N ha-1. BNF ranged from 55 to 78% of plant N in one location and from 36 to 56% in another location, but BNF did not occur in the other three locations. Although the factors that blocked effective symbiosis were not determined, symbiosis was not influenced by P or K availability. The proportion of N2 fixation was similar in the grainproducing, dry culm genotypes and in the sugar-rich, succulent culm genotypes. The sorghum genotypes fixed N2, reaching up to 218 kg ha-1 N, without inoculation with diazotrophs. Therefore, sorghum has a high potential to fix atmospheric N2, but the factors that block N2 fixation... Mostrar Tudo |
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Palavras-Chave: |
Fixação biológica de nitrogênio; Técnica de abundância natural. |
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Thesagro: |
Bactéria; Fixação de Nitrogênio; Nitrogênio; Sorgo. |
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Thesaurus NAL: |
Biological control; Grain sorghum; Sorghum bicolor subsp. bicolor. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/214133/1/Biological-nitrogen-fixation-2020.pdf
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Marc: |
LEADER 02683naa a2200337 a 4500
001 2123405
005 2020-06-22
008 2020 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s10705-020-10051-3$2DOI
100 1 $aBARROS, B. G. de F.
245 $aBiological nitrogen fixation in field-grown sorghum under different edaphoclimatic conditions is confirmed by N isotopic signatures.$h[electronic resource]
260 $c2020
520 $aThe association between sorghum and N2-fixing bacteria has been assessed only under limited conditions. We investigated biological nitrogen fixation (BNF) in situ in fifteen sorghum genotypes with dry or succulent culm types under five edaphoclimatic conditions. One randomized block experiment was established in each of five locations, from the humid to the semiarid regions of Pernambuco state, Brazil. BNF was estimated using the 15N natural abundance method by comparing the average d15N value of each sorghum genotype with those of the reference species. High levels of productivity, up to 22 Mg shoot biomass ha-1 in the 3-month cycle, were obtained where rainfall was high, and up to 5 Mg ha-1 was obtained under low rainfall. The nitrogen contents showed a similar pattern as biomass production, and the genotypes with the highest productivity accumulated from 200 to 300 kg N ha-1. BNF ranged from 55 to 78% of plant N in one location and from 36 to 56% in another location, but BNF did not occur in the other three locations. Although the factors that blocked effective symbiosis were not determined, symbiosis was not influenced by P or K availability. The proportion of N2 fixation was similar in the grainproducing, dry culm genotypes and in the sugar-rich, succulent culm genotypes. The sorghum genotypes fixed N2, reaching up to 218 kg ha-1 N, without inoculation with diazotrophs. Therefore, sorghum has a high potential to fix atmospheric N2, but the factors that block N2 fixation must be identified for crop management planning.
650 $aBiological control
650 $aGrain sorghum
650 $aSorghum bicolor subsp. bicolor
650 $aBactéria
650 $aFixação de Nitrogênio
650 $aNitrogênio
650 $aSorgo
653 $aFixação biológica de nitrogênio
653 $aTécnica de abundância natural
700 1 $aFREITAS, A. D. S. de
700 1 $aTABOSA, J. N.
700 1 $aLYRA, M. do C. C. P. de
700 1 $aMERGULHÃO, A. C. do E. S.
700 1 $aSILVA, A. F. da
700 1 $aOLIVEIRA, W. da S.
700 1 $aFERNANDES JUNIOR, P. I.
700 1 $aSAMPAIO, E. V. de S. B.
773 $tNutrient Cycling in Agroecosystems$gv. 117, p. 93-101, 2020.
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Embrapa Semiárido (CPATSA) |
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