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Registro Completo |
Biblioteca(s): |
Embrapa Soja; Embrapa Trigo. |
Data corrente: |
25/05/1994 |
Data da última atualização: |
22/08/1994 |
Autoria: |
VELLOSO, J. A. R. de O.; CORREA, C. F.; TONELLO, J. P.; TEIXEIRA, E. T. |
Título: |
Formação de semente genética de cultivares de soja. |
Ano de publicação: |
1977 |
Fonte/Imprenta: |
In: EMBRAPA. Centro Nacional de Pesquisa de Trigo. Resultados de pesquisa em soja obtidos no Centro Nacional de Pesquisa de Trigo em 1976/77. Passo Fundo, 1977. |
Páginas: |
p. 5-6 |
Idioma: |
Português |
Notas: |
Trabalho apresentado na V Reunião Conjunta de Pesquisa de Soja da Região Sul, Pelotas, 1977. |
Palavras-Chave: |
Cultivar; Line; Seed; Soybean; Variety. |
Thesagro: |
Genética; Linhagem; Semente; Soja. |
Thesaurus Nal: |
genetics. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00895naa a2200289 a 4500 001 1824728 005 1994-08-22 008 1977 bl uuuu u00u1 u #d 100 1 $aVELLOSO, J. A. R. de O. 245 $aFormação de semente genética de cultivares de soja. 260 $c1977 300 $ap. 5-6 500 $aTrabalho apresentado na V Reunião Conjunta de Pesquisa de Soja da Região Sul, Pelotas, 1977. 650 $agenetics 650 $aGenética 650 $aLinhagem 650 $aSemente 650 $aSoja 653 $aCultivar 653 $aLine 653 $aSeed 653 $aSoybean 653 $aVariety 700 1 $aCORREA, C. F. 700 1 $aTONELLO, J. P. 700 1 $aTEIXEIRA, E. T. 773 $tIn: EMBRAPA. Centro Nacional de Pesquisa de Trigo. Resultados de pesquisa em soja obtidos no Centro Nacional de Pesquisa de Trigo em 1976/77. Passo Fundo, 1977.
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Embrapa Trigo (CNPT) |
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Registro Completo
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
29/08/2022 |
Data da última atualização: |
29/08/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
PESSOA, L. G. M.; FREIRE, M. B. G. dos S.; GREEN, C. H. M.; MIRANDA, M. F. A.; ARAUJO FILHO, J. C. de; PESSOA, W. R. L. S. |
Afiliação: |
LUIZ G. M. PESSOA, UNIVERSIDADE FEDERAL RURAL DE PERNAMBUCO; MARIA B. G. DOS S. FREIRE, UNIVERSIDADE FEDERAL RURAL DE PERNAMBUCO; COLLEEN H. M. GREEN, NATIONAL OPERATIONS CENTER; MÁRCIO F. A. MIRANDA, INSTITUTO FEDERAL DE PERNAMBUCO; JOSE COELHO DE ARAUJO FILHO, CNPS; WAGNER R. L. S. PESSOA, UNIVERSIDADE ESTADUAL DO PIAUÍ. |
Título: |
Assessment of soil salinity status under different land-use conditions in the semiarid region of Northeastern Brazil. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Ecological Indicators, v. 141, 109139, Aug. 2022. |
DOI: |
https://doi.org/10.1016/j.ecolind.2022.109139 |
Idioma: |
Inglês |
Conteúdo: |
Soil salinization and sodification, caused by inadequate land management, is one of the main threats to the semiarid agroecosystems. It is essential to investigate saline levels under different land-use conditions to maintain the sustainability of agricultural production. The main objective of this study was to diagnose the salinity status of the soil in different land-use conditions in the semiarid region of Northeast Brazil. Soil samples were collected in the surface layer (0-5 cm) of three different land-use conditions: areas of low salinity (native vegetation - Caatinga), areas of different saline levels (cultivated areas), and areas of very high salinity (desertified by salinity), and compared regarding the chemical attributes of the soils by descriptive and multivariate analysis. The results showed that sodium and chloride were the predominant soluble ions in cultivated and desertified areas due to saline waters commonly used in the study region. Increases in electrical conductivity values of 1219 and 23207% were observed for cultivated and desertified areas, respectively, compared to areas of native vegetation. The principal component analysis contributed to identifying parameters responsible for the variation in soil salinity, and the second factor identified that percentage of exchangeable sodium, electrical conductivity, and exchangeable and soluble sodium plays an essential role in soil desertification. However, calcium, magnesium, sodium, and chloride ions correlated positively with variables that degrade soils - EC, ESP, and SAR. We also found that in desertified areas, in addition to chloride, sulfate is also present in expressive levels, and due to the strong associations with calcium, magnesium, and sodium, our study suggests that in addition to the free forms of these ions, the forms of chlorides and sulfates of calcium, magnesium, and sodium also effectively contribute to the degradation of the areas. The combination of multivariate analysis × geochemistry × laboratory techniques was a valuable tool to identify and monitor saline levels in converting uncultivated to cultivated areas and from cultivated areas to desertified areas. MenosSoil salinization and sodification, caused by inadequate land management, is one of the main threats to the semiarid agroecosystems. It is essential to investigate saline levels under different land-use conditions to maintain the sustainability of agricultural production. The main objective of this study was to diagnose the salinity status of the soil in different land-use conditions in the semiarid region of Northeast Brazil. Soil samples were collected in the surface layer (0-5 cm) of three different land-use conditions: areas of low salinity (native vegetation - Caatinga), areas of different saline levels (cultivated areas), and areas of very high salinity (desertified by salinity), and compared regarding the chemical attributes of the soils by descriptive and multivariate analysis. The results showed that sodium and chloride were the predominant soluble ions in cultivated and desertified areas due to saline waters commonly used in the study region. Increases in electrical conductivity values of 1219 and 23207% were observed for cultivated and desertified areas, respectively, compared to areas of native vegetation. The principal component analysis contributed to identifying parameters responsible for the variation in soil salinity, and the second factor identified that percentage of exchangeable sodium, electrical conductivity, and exchangeable and soluble sodium plays an essential role in soil desertification. However, calcium, magnesium, sodium, and chloride ions correl... Mostrar Tudo |
Thesagro: |
Deterioração do Solo; Gestão; Mudança Climática; Solo; Solo Salino; Solo Sódico. |
Thesaurus NAL: |
Climate change; Saline soils; Sodic soils; Soil degradation; Soil management. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1145823/1/Assessment-of-soil-salinity-status-2022.pdf
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Marc: |
LEADER 03181naa a2200325 a 4500 001 2145823 005 2022-08-29 008 2022 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.ecolind.2022.109139$2DOI 100 1 $aPESSOA, L. G. M. 245 $aAssessment of soil salinity status under different land-use conditions in the semiarid region of Northeastern Brazil.$h[electronic resource] 260 $c2022 520 $aSoil salinization and sodification, caused by inadequate land management, is one of the main threats to the semiarid agroecosystems. It is essential to investigate saline levels under different land-use conditions to maintain the sustainability of agricultural production. The main objective of this study was to diagnose the salinity status of the soil in different land-use conditions in the semiarid region of Northeast Brazil. Soil samples were collected in the surface layer (0-5 cm) of three different land-use conditions: areas of low salinity (native vegetation - Caatinga), areas of different saline levels (cultivated areas), and areas of very high salinity (desertified by salinity), and compared regarding the chemical attributes of the soils by descriptive and multivariate analysis. The results showed that sodium and chloride were the predominant soluble ions in cultivated and desertified areas due to saline waters commonly used in the study region. Increases in electrical conductivity values of 1219 and 23207% were observed for cultivated and desertified areas, respectively, compared to areas of native vegetation. The principal component analysis contributed to identifying parameters responsible for the variation in soil salinity, and the second factor identified that percentage of exchangeable sodium, electrical conductivity, and exchangeable and soluble sodium plays an essential role in soil desertification. However, calcium, magnesium, sodium, and chloride ions correlated positively with variables that degrade soils - EC, ESP, and SAR. We also found that in desertified areas, in addition to chloride, sulfate is also present in expressive levels, and due to the strong associations with calcium, magnesium, and sodium, our study suggests that in addition to the free forms of these ions, the forms of chlorides and sulfates of calcium, magnesium, and sodium also effectively contribute to the degradation of the areas. The combination of multivariate analysis × geochemistry × laboratory techniques was a valuable tool to identify and monitor saline levels in converting uncultivated to cultivated areas and from cultivated areas to desertified areas. 650 $aClimate change 650 $aSaline soils 650 $aSodic soils 650 $aSoil degradation 650 $aSoil management 650 $aDeterioração do Solo 650 $aGestão 650 $aMudança Climática 650 $aSolo 650 $aSolo Salino 650 $aSolo Sódico 700 1 $aFREIRE, M. B. G. dos S. 700 1 $aGREEN, C. H. M. 700 1 $aMIRANDA, M. F. A. 700 1 $aARAUJO FILHO, J. C. de 700 1 $aPESSOA, W. R. L. S. 773 $tEcological Indicators$gv. 141, 109139, Aug. 2022.
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