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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
20/02/2013 |
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Data da última atualização: |
06/06/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AGUIAR, M. I. de; FIALHO, J. S.; ARAÚJO, F. das C. S. de; CAMPANHA, M. M.; OLIVEIRA, T. S. de. |
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Afiliação: |
MONICA MATOSO CAMPANHA, CNPMS. |
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Título: |
Does biomass production depend on plant community diversity? |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Agroforestry Systems, Dordrecht, v. 87, n. 3, p. 699-711, 2013. |
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DOI: |
10.1007/s10457-012-9590-9 |
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Idioma: |
Inglês |
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Conteúdo: |
In order to ensure the sustainability of agroecosystems, biodiversity must be a priority. Agroforestry, which includes trees, is an example of such diverse systems. We evaluated plant diversity and aboveground biomass production to assess whether areas under fallow following traditional cultivation return to their initial condition. Also, plant diversity and aboveground biomass production were assessed in agroforestry systems (AFS) to determine if these were similar to unmanaged ecosystems. Another objective of the study was to observe the influence of plant diversity on aboveground biomass production in plant communities and also in the population of the dominant species, Cordia oncocalyx. Plant diversity was evaluated by assessing species richness, as well as using Shannon’s (H0) and Pielou’s (J0) indices. Aboveground plant biomass was evaluated in two AFS: agrosilvopastoral (ASP) and silvopastoral (SP), and also in a traditionally managed agricultural system (AG), areas that had been under fallow for six years (F6) and nine years (F9) and an area of unmanaged caatinga (CAT) vegetation. We observed that the ASP system had a lower diversity and number of species, especially tree species. However, it sustained the same total biomass production as CAT and fallow areas. The SP system, despite having lower H0 and J0 indices as well as lower total biomass production, had a similar number of species to CAT and cropped and fallow systems AG, F6 and F9. Plant biomass in F6 and F9 had recovered to productivity levels of unmanaged CAT vegetation; however the diversity indices were not restored to the same level. Plant diversity did not have an effect on the productivity of the agroecosystems. Likewise, annual biomass production by C. oncocalyx is not dependent upon diversity, but it is influenced by the growth stage of individuals. MenosIn order to ensure the sustainability of agroecosystems, biodiversity must be a priority. Agroforestry, which includes trees, is an example of such diverse systems. We evaluated plant diversity and aboveground biomass production to assess whether areas under fallow following traditional cultivation return to their initial condition. Also, plant diversity and aboveground biomass production were assessed in agroforestry systems (AFS) to determine if these were similar to unmanaged ecosystems. Another objective of the study was to observe the influence of plant diversity on aboveground biomass production in plant communities and also in the population of the dominant species, Cordia oncocalyx. Plant diversity was evaluated by assessing species richness, as well as using Shannon’s (H0) and Pielou’s (J0) indices. Aboveground plant biomass was evaluated in two AFS: agrosilvopastoral (ASP) and silvopastoral (SP), and also in a traditionally managed agricultural system (AG), areas that had been under fallow for six years (F6) and nine years (F9) and an area of unmanaged caatinga (CAT) vegetation. We observed that the ASP system had a lower diversity and number of species, especially tree species. However, it sustained the same total biomass production as CAT and fallow areas. The SP system, despite having lower H0 and J0 indices as well as lower total biomass production, had a similar number of species to CAT and cropped and fallow systems AG, F6 and F9. Plant biomass in F6 and F9 h... Mostrar Tudo |
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Palavras-Chave: |
Agroecologia. |
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Thesagro: |
Ecologia vegetal. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/158878/1/Does-biomass-1.pdf
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Marc: |
LEADER 02478naa a2200205 a 4500
001 1950111
005 2017-06-06
008 2013 bl uuuu u00u1 u #d
024 7 $a10.1007/s10457-012-9590-9$2DOI
100 1 $aAGUIAR, M. I. de
245 $aDoes biomass production depend on plant community diversity?$h[electronic resource]
260 $c2013
520 $aIn order to ensure the sustainability of agroecosystems, biodiversity must be a priority. Agroforestry, which includes trees, is an example of such diverse systems. We evaluated plant diversity and aboveground biomass production to assess whether areas under fallow following traditional cultivation return to their initial condition. Also, plant diversity and aboveground biomass production were assessed in agroforestry systems (AFS) to determine if these were similar to unmanaged ecosystems. Another objective of the study was to observe the influence of plant diversity on aboveground biomass production in plant communities and also in the population of the dominant species, Cordia oncocalyx. Plant diversity was evaluated by assessing species richness, as well as using Shannon’s (H0) and Pielou’s (J0) indices. Aboveground plant biomass was evaluated in two AFS: agrosilvopastoral (ASP) and silvopastoral (SP), and also in a traditionally managed agricultural system (AG), areas that had been under fallow for six years (F6) and nine years (F9) and an area of unmanaged caatinga (CAT) vegetation. We observed that the ASP system had a lower diversity and number of species, especially tree species. However, it sustained the same total biomass production as CAT and fallow areas. The SP system, despite having lower H0 and J0 indices as well as lower total biomass production, had a similar number of species to CAT and cropped and fallow systems AG, F6 and F9. Plant biomass in F6 and F9 had recovered to productivity levels of unmanaged CAT vegetation; however the diversity indices were not restored to the same level. Plant diversity did not have an effect on the productivity of the agroecosystems. Likewise, annual biomass production by C. oncocalyx is not dependent upon diversity, but it is influenced by the growth stage of individuals.
650 $aEcologia vegetal
653 $aAgroecologia
700 1 $aFIALHO, J. S.
700 1 $aARAÚJO, F. das C. S. de
700 1 $aCAMPANHA, M. M.
700 1 $aOLIVEIRA, T. S. de
773 $tAgroforestry Systems, Dordrecht$gv. 87, n. 3, p. 699-711, 2013.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Biblioteca |
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Cutter |
Registro |
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URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
15/06/2023 |
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Data da última atualização: |
15/06/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
VILVERT, J. C.; SANTOS, L. F. dos; CARDOSO, A. D.; LOPES, P. R. C.; AMARANTE, C. V. T. do; FREITAS, S. T. de. |
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Afiliação: |
JOÃO CLAUDIO VILVERT, State University of Southwestern Bahia, Vitória da Conquista-BA; LUANA FERREIRA DOS SANTOS; ADRIANA DIAS CARDOSO, State University of Southwestern Bahia, Vitória da Conquista-BA; PAULO ROBERTO COELHO LOPES, CPATSA; CASSANDRO VIDAL TALAMINI DO AMARANTE, State University of Santa Catarina, Lages-SC; SERGIO TONETTO DE FREITAS, CPATSA. |
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Título: |
Non-destructive assessment of quality traits in apples and pears using near infrared spectroscopy and chemometrics. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Revista Brasileira de Fruticultura, v. 45, e-969, Mar./Apr. 2023. |
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DOI: |
https://dx.doi.org/10.1590/0100-29452023969 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to evaluate the performance of a hand-held NIR spectrometer for non-destructive quality analysis of apples and pears produced in the Brazilian Semi-arid region. NIR spectra were acquired with a portable spectrometer in the wavelength range of 750–1065 nm and reference analyses of dry matter content (DMC) and soluble solids content (SSC) were measured weekly during 10 weeks of storage at 0.5 °C. Spectra were pre-processed with standard normal variate and used to develop DMC and SSC models using partial least squares re- gression with full cross-validation. The models were validated using data not included in the calibration. Satisfactory prediction results were obtained for SSC in apples (R² = 0.58) and pears (R² = 0.55), and for DMC in apples (R² = 0.55) and pears (R² = 0.65). All prediction models showed a relative root mean square error of prediction lower than 8%. These findings indicate that the NIR spectrometer is a promising tool to be used for a rapid and non-destructive determination of internal quality traits in apples and pears. |
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Palavras-Chave: |
Espectrômetro portátil NIR; Qualidade do fruto; Quimiometria; Regressão de mínimos quadrados parciais; Regressão multivariada; Sólidos solúveis. |
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Thesagro: |
Maçã; Matéria Seca; Pêra; Pós-Colheita. |
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Thesaurus NAL: |
Apples; Dry matter intake; Fruit quality; Pears; Total soluble solids. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1154443/1/Non-destructive-assessment-of-quality-traits-in-apples-and-pears-using-near-infrared-spectroscopy-and-chemometrics-2023.pdf
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Marc: |
LEADER 02248naa a2200373 a 4500
001 2154443
005 2023-06-15
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://dx.doi.org/10.1590/0100-29452023969$2DOI
100 1 $aVILVERT, J. C.
245 $aNon-destructive assessment of quality traits in apples and pears using near infrared spectroscopy and chemometrics.$h[electronic resource]
260 $c2023
520 $aThe objective of this study was to evaluate the performance of a hand-held NIR spectrometer for non-destructive quality analysis of apples and pears produced in the Brazilian Semi-arid region. NIR spectra were acquired with a portable spectrometer in the wavelength range of 750–1065 nm and reference analyses of dry matter content (DMC) and soluble solids content (SSC) were measured weekly during 10 weeks of storage at 0.5 °C. Spectra were pre-processed with standard normal variate and used to develop DMC and SSC models using partial least squares re- gression with full cross-validation. The models were validated using data not included in the calibration. Satisfactory prediction results were obtained for SSC in apples (R² = 0.58) and pears (R² = 0.55), and for DMC in apples (R² = 0.55) and pears (R² = 0.65). All prediction models showed a relative root mean square error of prediction lower than 8%. These findings indicate that the NIR spectrometer is a promising tool to be used for a rapid and non-destructive determination of internal quality traits in apples and pears.
650 $aApples
650 $aDry matter intake
650 $aFruit quality
650 $aPears
650 $aTotal soluble solids
650 $aMaçã
650 $aMatéria Seca
650 $aPêra
650 $aPós-Colheita
653 $aEspectrômetro portátil NIR
653 $aQualidade do fruto
653 $aQuimiometria
653 $aRegressão de mínimos quadrados parciais
653 $aRegressão multivariada
653 $aSólidos solúveis
700 1 $aSANTOS, L. F. dos
700 1 $aCARDOSO, A. D.
700 1 $aLOPES, P. R. C.
700 1 $aAMARANTE, C. V. T. do
700 1 $aFREITAS, S. T. de
773 $tRevista Brasileira de Fruticultura$gv. 45, e-969, Mar./Apr. 2023.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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