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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
11/06/1996 |
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Data da última atualização: |
11/06/1996 |
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Autoria: |
FAGI, A. M.; DE DATTA, S. K. |
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Título: |
Environmental factors affecting nitrogen efficiency in flooded tropical rice. |
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Ano de publicação: |
1980 |
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Fonte/Imprenta: |
Fertilizer Research, v.2, n.1, p.53-59, 1981. |
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Idioma: |
Inglês |
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Conteúdo: |
How environmental factors modify the effect of time of nitrogen application on grain yield and yield components of rice (Oryza sativa L.) were studied under field experiments during the 1975 dry and wet seasons on a fertile Maahas clay soil (an isothermic clayey mixed AquaticTroupudalf). Two rice varieties, one early maturing (IR28) and one medium maturing (IR26), which are higly responsive to nitrogen fertilizer, were tested. These varieties were planted monthly from January through December. Three nitrogen levels were applied in a single or in split doses to examine the maximum nitrogen efficiency under different climatic conditions. Low solar radiation values during the reproductive growth periods of both varieties reduced the spikelet number per unit area. IR26 rice, with an excessive number of spikelets per panicle, was more sensitive to solar radiation. It produced a high percentage of unfilled spikelets at low solar radiation. Nitrogen levels higher than 120 kg N ha-1 were required to obtain maximumgrain yields from both varieties under high solar radiation values during the reproductive growth periods. At low solar radiation levels, 60 kg N ha-1 was adequate to get an optimum grain yield with fertilizer efficiency. Increased grain yields greater than 1.0 t ha-1 were obtained when the nitrogen fertilizer was applied at appropriate times. Proper application minimized the adverse effects of low solar energy. |
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Palavras-Chave: |
Arroz tropical; Flooded tropical rice; Iniciacao de panicula; Numero de espigas; Oryza sativa L; Panicle initiation; Spikelet numer. |
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Thesagro: |
Nitrogênio; Radiação Solar. |
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Thesaurus Nal: |
nitrogen; solar radiation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02168naa a2200265 a 4500
001 1789176
005 1996-06-11
008 1980 bl --- 0-- u #d
100 1 $aFAGI, A. M.
245 $aEnvironmental factors affecting nitrogen efficiency in flooded tropical rice.
260 $c1980
520 $aHow environmental factors modify the effect of time of nitrogen application on grain yield and yield components of rice (Oryza sativa L.) were studied under field experiments during the 1975 dry and wet seasons on a fertile Maahas clay soil (an isothermic clayey mixed AquaticTroupudalf). Two rice varieties, one early maturing (IR28) and one medium maturing (IR26), which are higly responsive to nitrogen fertilizer, were tested. These varieties were planted monthly from January through December. Three nitrogen levels were applied in a single or in split doses to examine the maximum nitrogen efficiency under different climatic conditions. Low solar radiation values during the reproductive growth periods of both varieties reduced the spikelet number per unit area. IR26 rice, with an excessive number of spikelets per panicle, was more sensitive to solar radiation. It produced a high percentage of unfilled spikelets at low solar radiation. Nitrogen levels higher than 120 kg N ha-1 were required to obtain maximumgrain yields from both varieties under high solar radiation values during the reproductive growth periods. At low solar radiation levels, 60 kg N ha-1 was adequate to get an optimum grain yield with fertilizer efficiency. Increased grain yields greater than 1.0 t ha-1 were obtained when the nitrogen fertilizer was applied at appropriate times. Proper application minimized the adverse effects of low solar energy.
650 $anitrogen
650 $asolar radiation
650 $aNitrogênio
650 $aRadiação Solar
653 $aArroz tropical
653 $aFlooded tropical rice
653 $aIniciacao de panicula
653 $aNumero de espigas
653 $aOryza sativa L
653 $aPanicle initiation
653 $aSpikelet numer
700 1 $aDE DATTA, S. K.
773 $tFertilizer Research$gv.2, n.1, p.53-59, 1981.
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Embrapa Pantanal (CPAP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
15/06/2022 |
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Data da última atualização: |
11/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 3 |
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Autoria: |
ANTUNES, L. F. de S.; VAZ, A. L. de S.; MARTELLETO, L. A. P.; LEAL, M. A. de A.; ALVES, R. dos S.; FERREIRA, T. dos S.; RUMJANEK, N. G.; CORREIA, M. E. F.; ROSA, R. C. C.; GUERRA, J. G. M. |
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Afiliação: |
LUIZ FERNANDO DE SOUSAANTUNES, UFRRJ; ANDRÉ FELIPE DE SOUSA VAZ, UFRRJ; LUIZ AURÉLIO PERES MARTELLETO, UFRRJ; MARCO ANTONIO DE ALMEIDA LEAL, CNPAB; RENATA DOS SANTOS ALVES, UFRRJ; TALITA DOS SANTOS FERREIRA, UFRRJ; NORMA GOUVEA RUMJANEK, CNPAB; MARIA ELIZABETH FERNANDES CORREIA, CNPAB; RAUL CASTRO CARRIELLO ROSA, CNPAB; JOSE GUILHERME MARINHO GUERRA, CNPAB. |
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Título: |
Sustainable organic substrate production using millicompost in combination with different plant residues for the cultivation of Passiflora edulis seedlings. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Environmental Technology & Innovation, v. 28, 102612, 2022. |
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ISSN: |
2352-1864 |
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Idioma: |
Inglês |
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Conteúdo: |
The use of sustainable organic substrates of recognized quality is essential in the production of seedlings of fruit species. In this context, the present study aimed to formulate different sustainable organic substrates based on millicompost combined with different proportions of locally available organic waste, such as coconut fiber (Cocos nucifera) powder, gliricidia (Gliricidia sepium) and elephant grass shavings (Pennisetum purpureum) for the production of Passiflora edulis seedlings. The organic substrates used were as follows: S1- millicompost; S2- commercial substrate and substrates formulated based on millicompost: S3%?25% millicompost + 25% gliricidia + 25% elephant grass + 25% coconut fiber; S4%?50% millicompost+ 50% elephant grass; (S5) 50% millicompost+ 50% gliricidia; (S6) 50% millicompost+ 50% coconut fiber. At 56 days of sowing, the following morphological parameters were evaluated: shoot dry mass (SDM); root dry mass (RDM); plant height (PH); number of leaves (NL); stalk diameter (SD); root volume (RV); leaf area in cm 2 (LA); seedling vigor (SV) and clod stability (CS). The nutrient contents (N, P, K, Ca and Mg) accumulated in the shoot dry mass of the seedlings were determined after this period. The organic substrates that provided seedlings with significantly higher parameters (P <0.05) of SDM, RDM, PH, NL, SD, RV, LA, SV and CS were as follows: S1> S6> S5. The other substrates (S2, S3 and S4) presented seedlings with morphological parameters similar to each other. In addition, there was a greater accumulation of P, K Ca and Mg (P <0.05) in the shoot dry mass of the seedlings developed on the substrates S1> S6> S5. The substrates S6 and S5 represent two new options of sustainable substrates, being effective in the production of yellow passion fruit seedlings with excellent vegetative growth rates. MenosThe use of sustainable organic substrates of recognized quality is essential in the production of seedlings of fruit species. In this context, the present study aimed to formulate different sustainable organic substrates based on millicompost combined with different proportions of locally available organic waste, such as coconut fiber (Cocos nucifera) powder, gliricidia (Gliricidia sepium) and elephant grass shavings (Pennisetum purpureum) for the production of Passiflora edulis seedlings. The organic substrates used were as follows: S1- millicompost; S2- commercial substrate and substrates formulated based on millicompost: S3%?25% millicompost + 25% gliricidia + 25% elephant grass + 25% coconut fiber; S4%?50% millicompost+ 50% elephant grass; (S5) 50% millicompost+ 50% gliricidia; (S6) 50% millicompost+ 50% coconut fiber. At 56 days of sowing, the following morphological parameters were evaluated: shoot dry mass (SDM); root dry mass (RDM); plant height (PH); number of leaves (NL); stalk diameter (SD); root volume (RV); leaf area in cm 2 (LA); seedling vigor (SV) and clod stability (CS). The nutrient contents (N, P, K, Ca and Mg) accumulated in the shoot dry mass of the seedlings were determined after this period. The organic substrates that provided seedlings with significantly higher parameters (P <0.05) of SDM, RDM, PH, NL, SD, RV, LA, SV and CS were as follows: S1> S6> S5. The other substrates (S2, S3 and S4) presented seedlings with morphological parameters similar to e... Mostrar Tudo |
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Palavras-Chave: |
Formulation of substrates; Millicomposting; Quality seedlings. |
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Thesaurus NAL: |
Fruits; Organic wastes; Passiflora edulis f. edulis. |
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Categoria do assunto: |
S Ciências Biológicas |
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Marc: |
LEADER 02864naa a2200313 a 4500
001 2144092
005 2022-11-11
008 2022 bl uuuu u00u1 u #d
022 $a2352-1864
100 1 $aANTUNES, L. F. de S.
245 $aSustainable organic substrate production using millicompost in combination with different plant residues for the cultivation of Passiflora edulis seedlings.$h[electronic resource]
260 $c2022
520 $aThe use of sustainable organic substrates of recognized quality is essential in the production of seedlings of fruit species. In this context, the present study aimed to formulate different sustainable organic substrates based on millicompost combined with different proportions of locally available organic waste, such as coconut fiber (Cocos nucifera) powder, gliricidia (Gliricidia sepium) and elephant grass shavings (Pennisetum purpureum) for the production of Passiflora edulis seedlings. The organic substrates used were as follows: S1- millicompost; S2- commercial substrate and substrates formulated based on millicompost: S3%?25% millicompost + 25% gliricidia + 25% elephant grass + 25% coconut fiber; S4%?50% millicompost+ 50% elephant grass; (S5) 50% millicompost+ 50% gliricidia; (S6) 50% millicompost+ 50% coconut fiber. At 56 days of sowing, the following morphological parameters were evaluated: shoot dry mass (SDM); root dry mass (RDM); plant height (PH); number of leaves (NL); stalk diameter (SD); root volume (RV); leaf area in cm 2 (LA); seedling vigor (SV) and clod stability (CS). The nutrient contents (N, P, K, Ca and Mg) accumulated in the shoot dry mass of the seedlings were determined after this period. The organic substrates that provided seedlings with significantly higher parameters (P <0.05) of SDM, RDM, PH, NL, SD, RV, LA, SV and CS were as follows: S1> S6> S5. The other substrates (S2, S3 and S4) presented seedlings with morphological parameters similar to each other. In addition, there was a greater accumulation of P, K Ca and Mg (P <0.05) in the shoot dry mass of the seedlings developed on the substrates S1> S6> S5. The substrates S6 and S5 represent two new options of sustainable substrates, being effective in the production of yellow passion fruit seedlings with excellent vegetative growth rates.
650 $aFruits
650 $aOrganic wastes
650 $aPassiflora edulis f. edulis
653 $aFormulation of substrates
653 $aMillicomposting
653 $aQuality seedlings
700 1 $aVAZ, A. L. de S.
700 1 $aMARTELLETO, L. A. P.
700 1 $aLEAL, M. A. de A.
700 1 $aALVES, R. dos S.
700 1 $aFERREIRA, T. dos S.
700 1 $aRUMJANEK, N. G.
700 1 $aCORREIA, M. E. F.
700 1 $aROSA, R. C. C.
700 1 $aGUERRA, J. G. M.
773 $tEnvironmental Technology & Innovation$gv. 28, 102612, 2022.
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Embrapa Agrobiologia (CNPAB) |
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