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Registro Completo |
Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
24/07/1995 |
Data da última atualização: |
24/07/1995 |
Autoria: |
GOMIDE, J. A.; NOLLER, C. H.; MOTT, G. O.; CONRAD, J. H.; HILL, D. L. |
Título: |
Mineral composition of six tropical grasses as influenced by plant age and nitrogen fertilization. |
Ano de publicação: |
1969 |
Fonte/Imprenta: |
Agronomy Journal, v.61, n.1, p.120-123, Jan./Feb. 1969. |
Idioma: |
Inglês |
Conteúdo: |
This study was conducted in central Brazil on a sandy loam soil which under normal conditions receives no fertilizer. The K, P, Ca, Mg, Cu, Mn, Fe, and Zn contents were determined on six grasses: Melinis minutiflora Beauv., Digitaria decumbens Stent., Pennisetum purpureum Schum., Pennistetum clandestinum Hochst., Cynodon dactylon Pers., and Panicum maximum Jacq. var. 'Gondlyodes Doell'. Significant decreases in K, P, MG, Cu and Fe in the forages (P < .01) occurred with advantage in plant age from 4 to 36 weeks. The average K content for all grasses at 4 weeks of age was 1.42% and at 36 weeks of age 0.30%. Kikuyugrass had the highest K content at 36 weeks of age (0.54%). The average P content for all grasses was 0.26% at 4 weeks and 0.12% at 36 weeks. Pangolagrass appeared to be a poor source of P at all ages studied (average 0.12%). Nitrogen fertilizer had no effect on any of the minerals studied except for Mn which increased with N fertilization. Under the conditions of the experiment, the forages could be deficient in K and P for cattle and borderline in zinc. |
Palavras-Chave: |
Composicao mineral; Fertilizacao; Mineral composition; Nitrogen fertilization; Pastagem tropical; Tropical grasses. |
Thesagro: |
Nitrogênio. |
Thesaurus Nal: |
plant age. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01833naa a2200265 a 4500 001 1784908 005 1995-07-24 008 1969 bl --- 0-- u #d 100 1 $aGOMIDE, J. A. 245 $aMineral composition of six tropical grasses as influenced by plant age and nitrogen fertilization. 260 $c1969 520 $aThis study was conducted in central Brazil on a sandy loam soil which under normal conditions receives no fertilizer. The K, P, Ca, Mg, Cu, Mn, Fe, and Zn contents were determined on six grasses: Melinis minutiflora Beauv., Digitaria decumbens Stent., Pennisetum purpureum Schum., Pennistetum clandestinum Hochst., Cynodon dactylon Pers., and Panicum maximum Jacq. var. 'Gondlyodes Doell'. Significant decreases in K, P, MG, Cu and Fe in the forages (P < .01) occurred with advantage in plant age from 4 to 36 weeks. The average K content for all grasses at 4 weeks of age was 1.42% and at 36 weeks of age 0.30%. Kikuyugrass had the highest K content at 36 weeks of age (0.54%). The average P content for all grasses was 0.26% at 4 weeks and 0.12% at 36 weeks. Pangolagrass appeared to be a poor source of P at all ages studied (average 0.12%). Nitrogen fertilizer had no effect on any of the minerals studied except for Mn which increased with N fertilization. Under the conditions of the experiment, the forages could be deficient in K and P for cattle and borderline in zinc. 650 $aplant age 650 $aNitrogênio 653 $aComposicao mineral 653 $aFertilizacao 653 $aMineral composition 653 $aNitrogen fertilization 653 $aPastagem tropical 653 $aTropical grasses 700 1 $aNOLLER, C. H. 700 1 $aMOTT, G. O. 700 1 $aCONRAD, J. H. 700 1 $aHILL, D. L. 773 $tAgronomy Journal$gv.61, n.1, p.120-123, Jan./Feb. 1969.
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Embrapa Pantanal (CPAP) |
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Registro Completo
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
18/08/2011 |
Data da última atualização: |
29/09/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
PAGANO, M. C.; UTIDA, M. K.; GOMES, E. A.; MARRIEL, I. E.; CABELLO, M. N.; SCOTTI, M. R. |
Afiliação: |
MARCELA C. PAGANO, UFMG; MIRIAM K. UTIDA; ELIANE APARECIDA GOMES, CNPMS; IVANILDO EVODIO MARRIEL, CNPMS; MARTA N. CABELLO; MARIA RITA SCOTTI, UFMG. |
Título: |
Plant-type dependent changes in arbuscular mycorrhizal communities as soil quality indicator in semi-arid Brazil. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Ecological Indicators, v. 11, n. 2, p. 643-650, 2011. |
DOI: |
10.1016/j.ecolind.2010.09.001 |
Idioma: |
Inglês |
Conteúdo: |
A large remaining of dry deciduous forest (woody Caatinga) in semi-arid Brazil has been reached by successive fires and exploratory actions what leads to the invasion of low load trees and shrub mesh, called ?Carrasco vegetation?. As it restrains the sprouting of woody species, land recuperation was performed using a mixed plantation of native and Eucalyptus species to both preservation and to supply the demand for wood. In order to evaluate the recuperation, a study of microbial communities was proposed. In addition to the highest soil phosphorus content found in the Carrasco area, the greatest spore density of arbuscular mycorrhizal fungi (AMF) communities occurred in the rhizosphere of the both pioneer species: Carrasco and Eucalyptus. In contrast to the DGGE bacteria profile, it was possible to group AMF species of the preserved and experimental sites which were not clustered with Carrasco species through the DGGE of Glomales DNA and also by the principal component analysis (PCA) based on diversity index. Glomus and Acaulospora were the dominant genera at both the preserved site and Carrasco. Nevertheless, Gigaspora species were preferentially found in Dry Forest, while Scutellospora were absent. In contrast, Carrasco favoured the genus Scutellospora and the species Acaulospora scrobiculata. Our results allow one to conclude that vegetation type modifies the AMF communities, which may be used as good indicator of soil quality. Based on AMF communities as soil quality indicator, the mixed forest plantation appears to be underway towards the preserved site two years after transplantation. MenosA large remaining of dry deciduous forest (woody Caatinga) in semi-arid Brazil has been reached by successive fires and exploratory actions what leads to the invasion of low load trees and shrub mesh, called ?Carrasco vegetation?. As it restrains the sprouting of woody species, land recuperation was performed using a mixed plantation of native and Eucalyptus species to both preservation and to supply the demand for wood. In order to evaluate the recuperation, a study of microbial communities was proposed. In addition to the highest soil phosphorus content found in the Carrasco area, the greatest spore density of arbuscular mycorrhizal fungi (AMF) communities occurred in the rhizosphere of the both pioneer species: Carrasco and Eucalyptus. In contrast to the DGGE bacteria profile, it was possible to group AMF species of the preserved and experimental sites which were not clustered with Carrasco species through the DGGE of Glomales DNA and also by the principal component analysis (PCA) based on diversity index. Glomus and Acaulospora were the dominant genera at both the preserved site and Carrasco. Nevertheless, Gigaspora species were preferentially found in Dry Forest, while Scutellospora were absent. In contrast, Carrasco favoured the genus Scutellospora and the species Acaulospora scrobiculata. Our results allow one to conclude that vegetation type modifies the AMF communities, which may be used as good indicator of soil quality. Based on AMF communities as soil quality ind... Mostrar Tudo |
Palavras-Chave: |
Veiscular arbuscular mycorrhizae. |
Thesagro: |
Micorriza vesicular arbuscular; Solo. |
Thesaurus NAL: |
Soil. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02369naa a2200241 a 4500 001 1898247 005 2017-09-29 008 2011 bl uuuu u00u1 u #d 024 7 $a10.1016/j.ecolind.2010.09.001$2DOI 100 1 $aPAGANO, M. C. 245 $aPlant-type dependent changes in arbuscular mycorrhizal communities as soil quality indicator in semi-arid Brazil.$h[electronic resource] 260 $c2011 520 $aA large remaining of dry deciduous forest (woody Caatinga) in semi-arid Brazil has been reached by successive fires and exploratory actions what leads to the invasion of low load trees and shrub mesh, called ?Carrasco vegetation?. As it restrains the sprouting of woody species, land recuperation was performed using a mixed plantation of native and Eucalyptus species to both preservation and to supply the demand for wood. In order to evaluate the recuperation, a study of microbial communities was proposed. In addition to the highest soil phosphorus content found in the Carrasco area, the greatest spore density of arbuscular mycorrhizal fungi (AMF) communities occurred in the rhizosphere of the both pioneer species: Carrasco and Eucalyptus. In contrast to the DGGE bacteria profile, it was possible to group AMF species of the preserved and experimental sites which were not clustered with Carrasco species through the DGGE of Glomales DNA and also by the principal component analysis (PCA) based on diversity index. Glomus and Acaulospora were the dominant genera at both the preserved site and Carrasco. Nevertheless, Gigaspora species were preferentially found in Dry Forest, while Scutellospora were absent. In contrast, Carrasco favoured the genus Scutellospora and the species Acaulospora scrobiculata. Our results allow one to conclude that vegetation type modifies the AMF communities, which may be used as good indicator of soil quality. Based on AMF communities as soil quality indicator, the mixed forest plantation appears to be underway towards the preserved site two years after transplantation. 650 $aSoil 650 $aMicorriza vesicular arbuscular 650 $aSolo 653 $aVeiscular arbuscular mycorrhizae 700 1 $aUTIDA, M. K. 700 1 $aGOMES, E. A. 700 1 $aMARRIEL, I. E. 700 1 $aCABELLO, M. N. 700 1 $aSCOTTI, M. R. 773 $tEcological Indicators$gv. 11, n. 2, p. 643-650, 2011.
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