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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Meio-Norte. |
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Data corrente: |
10/07/1996 |
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Data da última atualização: |
26/01/2023 |
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Autoria: |
SOUSA, G. F. de. |
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Afiliação: |
GLADYS FERREIRA DE SOUSA, CPATU. |
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Título: |
Evaluation of the role of different soil horizons in producing growth of Picea glauca, (Moench) Voss., seedlings. |
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Ano de publicação: |
1974 |
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Fonte/Imprenta: |
1974. |
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Páginas: |
60 f. |
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Idioma: |
Inglês |
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Notas: |
Thesis (Master of Science in Agronomy) - University of Maine at Orono, Orono. |
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Conteúdo: |
An experiment was designed to determine the effect of 5 forest soil horizons on the growth of Picea glauca (Moench) Voss and to evaluate the contribution of each horizon and two levels of lime in the rate of organic matter decomposition and availability of nutrients. The growth of spruce measured by the fresh and dry weight was affected considerably by the percent organic matter in the soil. The concentration of nutrients in tops and roots was closely related to the concentration of nutrients in the soil with the exception of Ca and Mg concentration. These two elements showed concentration that were higher in tops and roots of white spruce grown in low horizons. This, however, was associated with a decrease in growth. The organic matter was probably the most significant factor for growth of Picea glauca and the increase in mineral composition of the soil profile (9, 17). |
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Palavras-Chave: |
Fertility; Forest soil; Pecea glauca. |
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Thesagro: |
Fertilidade; Solo; Solo Florestal. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/159142/1/EVALUATION...-.pdf
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Marc: |
LEADER 01491nam a2200205 a 4500
001 1401561
005 2023-01-26
008 1974 bl uuuu m 00u1 u #d
100 1 $aSOUSA, G. F. de
245 $aEvaluation of the role of different soil horizons in producing growth of Picea glauca, (Moench) Voss., seedlings.
260 $a1974.$c1974
300 $a60 f.
500 $aThesis (Master of Science in Agronomy) - University of Maine at Orono, Orono.
520 $aAn experiment was designed to determine the effect of 5 forest soil horizons on the growth of Picea glauca (Moench) Voss and to evaluate the contribution of each horizon and two levels of lime in the rate of organic matter decomposition and availability of nutrients. The growth of spruce measured by the fresh and dry weight was affected considerably by the percent organic matter in the soil. The concentration of nutrients in tops and roots was closely related to the concentration of nutrients in the soil with the exception of Ca and Mg concentration. These two elements showed concentration that were higher in tops and roots of white spruce grown in low horizons. This, however, was associated with a decrease in growth. The organic matter was probably the most significant factor for growth of Picea glauca and the increase in mineral composition of the soil profile (9, 17).
650 $aFertilidade
650 $aSolo
650 $aSolo Florestal
653 $aFertility
653 $aForest soil
653 $aPecea glauca
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
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Data corrente: |
23/01/2017 |
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Data da última atualização: |
23/01/2017 |
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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: |
SANTOS, W. F.; PROCOPIO, S. de O.; SILVA, A. G.; FERNANDES, M. F.; BARROSO, A. L. L. |
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Afiliação: |
SERGIO DE OLIVEIRA PROCOPIO, CPATC; MARCELO FERREIRA FERNANDES, CPATC. |
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Título: |
Weed phytosociological and floristic survey in agricultural areas of southwestern Goiás region. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Planta Daninha, Viçosa, MG, v. 34, n. 1, p. 65-80, 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
The use of the Roundup Ready ® technology and the cultivation of a second cropinfluence the floristic composition of weed communities in Brazilian Central-West region cropping systems. This study has aimed to diagnose the dominant weed species in southwestern Goiás in areas of genetically-modified and conventional soybeans, using phytosociological and floristic surveys. Weed sampling was obtained by collecting all the plants present within a 0.5 m hollow frame, randomly thrown 20 times in each of thirty-five agricultural areas in the 2012/2013 harvest. Field survey was carried out in three periods: before desiccation for soybean sowing, before postemergence herbicide in soybean first application and before postemergence herbicide application in late harvest. A total of 525 m2 was inventoried and 3,219 weeds were collected, which included 79 species, 58 genera and 28 families. Families Poaceae, Asteraceae, Euphorbiaceae, Fabaceae, Amaranthaceae, were the most representative in the survey. Species Cenchrus echinatus, Glycine max, Chamaesyce hirta, Commelina benghalensis, and Alternanthera tenella stood out in importance. The RR+millet soybean treatment had the highest number of species (44), while the conventional soybean + sorghum treatment had the lowest number of species (18). The highest number of species was recorded in first sampling period. Treatments conventional soybean + maize and conventional soybean + millet showed higher similarity (70%), while treatments RR soybean + millet and conventional soybean + sorghum showed the least (51%). Species of difficult control were recorded in all cultivation systems analyzed. MenosThe use of the Roundup Ready ® technology and the cultivation of a second cropinfluence the floristic composition of weed communities in Brazilian Central-West region cropping systems. This study has aimed to diagnose the dominant weed species in southwestern Goiás in areas of genetically-modified and conventional soybeans, using phytosociological and floristic surveys. Weed sampling was obtained by collecting all the plants present within a 0.5 m hollow frame, randomly thrown 20 times in each of thirty-five agricultural areas in the 2012/2013 harvest. Field survey was carried out in three periods: before desiccation for soybean sowing, before postemergence herbicide in soybean first application and before postemergence herbicide application in late harvest. A total of 525 m2 was inventoried and 3,219 weeds were collected, which included 79 species, 58 genera and 28 families. Families Poaceae, Asteraceae, Euphorbiaceae, Fabaceae, Amaranthaceae, were the most representative in the survey. Species Cenchrus echinatus, Glycine max, Chamaesyce hirta, Commelina benghalensis, and Alternanthera tenella stood out in importance. The RR+millet soybean treatment had the highest number of species (44), while the conventional soybean + sorghum treatment had the lowest number of species (18). The highest number of species was recorded in first sampling period. Treatments conventional soybean + maize and conventional soybean + millet showed higher similarity (70%), while treatments RR soybe... Mostrar Tudo |
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Palavras-Chave: |
Floristic; Planta daninha. |
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Thesagro: |
Flor. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/153796/1/Planta-daninha.pdf
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Marc: |
LEADER 02260naa a2200205 a 4500
001 2061523
005 2017-01-23
008 2016 bl uuuu u00u1 u #d
100 1 $aSANTOS, W. F.
245 $aWeed phytosociological and floristic survey in agricultural areas of southwestern Goiás region.$h[electronic resource]
260 $c2016
520 $aThe use of the Roundup Ready ® technology and the cultivation of a second cropinfluence the floristic composition of weed communities in Brazilian Central-West region cropping systems. This study has aimed to diagnose the dominant weed species in southwestern Goiás in areas of genetically-modified and conventional soybeans, using phytosociological and floristic surveys. Weed sampling was obtained by collecting all the plants present within a 0.5 m hollow frame, randomly thrown 20 times in each of thirty-five agricultural areas in the 2012/2013 harvest. Field survey was carried out in three periods: before desiccation for soybean sowing, before postemergence herbicide in soybean first application and before postemergence herbicide application in late harvest. A total of 525 m2 was inventoried and 3,219 weeds were collected, which included 79 species, 58 genera and 28 families. Families Poaceae, Asteraceae, Euphorbiaceae, Fabaceae, Amaranthaceae, were the most representative in the survey. Species Cenchrus echinatus, Glycine max, Chamaesyce hirta, Commelina benghalensis, and Alternanthera tenella stood out in importance. The RR+millet soybean treatment had the highest number of species (44), while the conventional soybean + sorghum treatment had the lowest number of species (18). The highest number of species was recorded in first sampling period. Treatments conventional soybean + maize and conventional soybean + millet showed higher similarity (70%), while treatments RR soybean + millet and conventional soybean + sorghum showed the least (51%). Species of difficult control were recorded in all cultivation systems analyzed.
650 $aFlor
653 $aFloristic
653 $aPlanta daninha
700 1 $aPROCOPIO, S. de O.
700 1 $aSILVA, A. G.
700 1 $aFERNANDES, M. F.
700 1 $aBARROSO, A. L. L.
773 $tPlanta Daninha, Viçosa, MG$gv. 34, n. 1, p. 65-80, 2016.
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Embrapa Tabuleiros Costeiros (CPATC) |
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