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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
31/08/1995 |
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Data da última atualização: |
30/08/2010 |
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Autoria: |
BAKER, R. T. |
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Título: |
Changes in the chemical nature of soil organic phosphate during pedogenesis. |
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Ano de publicação: |
1976 |
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Fonte/Imprenta: |
Journal of Soil Science, v.27, n.4, p.504-512, 1976. |
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Idioma: |
Inglês |
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Conteúdo: |
In two chronosequences of soils, total organic phosphate (Po) accumulated rapidly during the first 50 years of soil development, when organic matter increased and pH decreased. The rate of Po accumulation then declined with age of soil until a 'steady state' was reached. The amounts of phospholipid, inositol phosphates and humic acid - Po followed the same trends as the total Po. Parent materials and very young soils contained largely citric acid-soluble Po, but after less than 50 years, surface horizons accumulated sufficient organic matter to complex a considerable proportion of the Po. An upper limit of 20-5 per cent citric acid-soluble Po and 70-80 per cent Na)H-soluble Po was attained within 50 years of soil formation in the surface layers, and this slowly extended down the profile so that, after 10 000 yeras, the soil had 20 per cent citric acid soluble-Po and 70 per cent NaOH-soluble Po to a depth of r m. |
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Palavras-Chave: |
Chemical nature; Fosfato organico; Organic phosphate; Pedogenesis; Quimica natural. |
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Thesagro: |
Solo. |
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Thesaurus Nal: |
soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01478naa a2200205 a 4500
001 1785981
005 2010-08-30
008 1976 bl --- 0-- u #d
100 1 $aBAKER, R. T.
245 $aChanges in the chemical nature of soil organic phosphate during pedogenesis.
260 $c1976
520 $aIn two chronosequences of soils, total organic phosphate (Po) accumulated rapidly during the first 50 years of soil development, when organic matter increased and pH decreased. The rate of Po accumulation then declined with age of soil until a 'steady state' was reached. The amounts of phospholipid, inositol phosphates and humic acid - Po followed the same trends as the total Po. Parent materials and very young soils contained largely citric acid-soluble Po, but after less than 50 years, surface horizons accumulated sufficient organic matter to complex a considerable proportion of the Po. An upper limit of 20-5 per cent citric acid-soluble Po and 70-80 per cent Na)H-soluble Po was attained within 50 years of soil formation in the surface layers, and this slowly extended down the profile so that, after 10 000 yeras, the soil had 20 per cent citric acid soluble-Po and 70 per cent NaOH-soluble Po to a depth of r m.
650 $asoil
650 $aSolo
653 $aChemical nature
653 $aFosfato organico
653 $aOrganic phosphate
653 $aPedogenesis
653 $aQuimica natural
773 $tJournal of Soil Science$gv.27, n.4, p.504-512, 1976.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
12/08/2019 |
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Data da última atualização: |
02/12/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
OLIVEIRA, P. G. de; QUEIROZ, M. A. de; CASTRO, J. M. da C. e; RIBEIRO, J. M.; OLIVEIRA, R. S. de; SILVA, M. J. L. da. |
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Afiliação: |
PATRÍCIA GOMES DE OLIVEIRA; MANOEL ABILIO DE QUEIROZ; JOSE MAURO DA CUNHA E CASTRO, CPATSA; JULIANA MARTINS RIBEIRO, CPATSA; RONALDO SIMÃO DE OLIVEIRA; MARIA JOSÉ LIMA DA SILVA. |
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Título: |
Reaction of Psidium spp accessions to different levels of inoculation with Meloidogyne enterolobii. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Revista Caatinga, v. 32, n. 2, p. 419-428, abr./jun. 2019. |
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DOI: |
10.1590/1983 - 21252019v32n215rc |
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Idioma: |
Inglês |
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Conteúdo: |
Meloidogyne enterolobii associated with Fusarium solani causes the guava decay, which is the main factor of yield loss in guava crops and limits guava production in Brazil. Therefore, searching for guava genotypes (Psidium spp.) with resistance to M. enterolobii is important to control this root-knot nematode. The objective of the present work was to evaluate the reaction of Psidium spp. accessions from the Germplasm Bank of the Bahia State University (UNEB) to different levels of inoculation with M. enterolobii. Guava seedlings were inoculated with 600, 1,600, and 2,000 eggs + J2 second stage juveniles of M. enterolobii and the root fresh weight, total number of eggs (TNE), and reproduction factor (RF) were evaluated. The results were subjected to ANOVA and means were clustered using the Scott-Knott test at 5% probability. The diversity of accessions was estimated using the Tocher's clustering and UPGMA methods. The nematode RF reduced in some accessions with increasing inoculation levels of the nematode. However, the RF increased in some accessions with high levels of inoculation. Plants of the Y50 accession were immune or resistant to M. enterolobii, indicating variability of reaction of plants to the nematode within the Psidium genus. The resistance of Psidium accessions to M. enterolobii needs to be measured with different inoculation levels to verify the existence of false-positive results, since the evaluated accessions, including the Paluma cultivar, presented distinct reactions regarding RF in the three levels of inoculation used. MenosMeloidogyne enterolobii associated with Fusarium solani causes the guava decay, which is the main factor of yield loss in guava crops and limits guava production in Brazil. Therefore, searching for guava genotypes (Psidium spp.) with resistance to M. enterolobii is important to control this root-knot nematode. The objective of the present work was to evaluate the reaction of Psidium spp. accessions from the Germplasm Bank of the Bahia State University (UNEB) to different levels of inoculation with M. enterolobii. Guava seedlings were inoculated with 600, 1,600, and 2,000 eggs + J2 second stage juveniles of M. enterolobii and the root fresh weight, total number of eggs (TNE), and reproduction factor (RF) were evaluated. The results were subjected to ANOVA and means were clustered using the Scott-Knott test at 5% probability. The diversity of accessions was estimated using the Tocher's clustering and UPGMA methods. The nematode RF reduced in some accessions with increasing inoculation levels of the nematode. However, the RF increased in some accessions with high levels of inoculation. Plants of the Y50 accession were immune or resistant to M. enterolobii, indicating variability of reaction of plants to the nematode within the Psidium genus. The resistance of Psidium accessions to M. enterolobii needs to be measured with different inoculation levels to verify the existence of false-positive results, since the evaluated accessions, including the Paluma cultivar, presented distin... Mostrar Tudo |
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Palavras-Chave: |
Meloidogyne enterolobii; Nematoide das galhas; Variabilidade genética. |
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Thesagro: |
Banco de Germoplasma; Doença; Goiaba; Nematóide. |
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Thesaurus NAL: |
Guavas; Psidium; Root-knot nematodes. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/200610/1/Reaction-of-2019.pdf
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Marc: |
LEADER 02512naa a2200313 a 4500
001 2111269
005 2019-12-02
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1590/1983 - 21252019v32n215rc$2DOI
100 1 $aOLIVEIRA, P. G. de
245 $aReaction of Psidium spp accessions to different levels of inoculation with Meloidogyne enterolobii.$h[electronic resource]
260 $c2019
520 $aMeloidogyne enterolobii associated with Fusarium solani causes the guava decay, which is the main factor of yield loss in guava crops and limits guava production in Brazil. Therefore, searching for guava genotypes (Psidium spp.) with resistance to M. enterolobii is important to control this root-knot nematode. The objective of the present work was to evaluate the reaction of Psidium spp. accessions from the Germplasm Bank of the Bahia State University (UNEB) to different levels of inoculation with M. enterolobii. Guava seedlings were inoculated with 600, 1,600, and 2,000 eggs + J2 second stage juveniles of M. enterolobii and the root fresh weight, total number of eggs (TNE), and reproduction factor (RF) were evaluated. The results were subjected to ANOVA and means were clustered using the Scott-Knott test at 5% probability. The diversity of accessions was estimated using the Tocher's clustering and UPGMA methods. The nematode RF reduced in some accessions with increasing inoculation levels of the nematode. However, the RF increased in some accessions with high levels of inoculation. Plants of the Y50 accession were immune or resistant to M. enterolobii, indicating variability of reaction of plants to the nematode within the Psidium genus. The resistance of Psidium accessions to M. enterolobii needs to be measured with different inoculation levels to verify the existence of false-positive results, since the evaluated accessions, including the Paluma cultivar, presented distinct reactions regarding RF in the three levels of inoculation used.
650 $aGuavas
650 $aPsidium
650 $aRoot-knot nematodes
650 $aBanco de Germoplasma
650 $aDoença
650 $aGoiaba
650 $aNematóide
653 $aMeloidogyne enterolobii
653 $aNematoide das galhas
653 $aVariabilidade genética
700 1 $aQUEIROZ, M. A. de
700 1 $aCASTRO, J. M. da C. e
700 1 $aRIBEIRO, J. M.
700 1 $aOLIVEIRA, R. S. de
700 1 $aSILVA, M. J. L. da
773 $tRevista Caatinga$gv. 32, n. 2, p. 419-428, abr./jun. 2019.
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