Utilização de nitrogênio pelo trigo cultivado em solo fertilizado com adubo verde (Crotalaria juncea) e/ou uréia

Araújo, Ademir Sérgio Ferreira de; Teixeira, Gleuber Mariano; Campos, Antônio Xavier de; Silva, Flávia Carvalho; Ambrosano, Edmilson José

doi:10.1590/s0103-84782005000200006

Cited by 13 publications

(8 citation statements)

References 18 publications

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“…Rosolem et al (2012), when working with the addition of potassium in Oxisol, observed an increase in the dry mass of roots of Braquiaria (B. ruziziensis), with maximum production obtained in a potassium dose of 300 mg dm An increase in dry matter production, promoted by nitrogen fertilization, was also reported by Araújo et al (2005), who evaluated the response of wheat (cv. IAC-24) to nitrogen via green manure and mineral fertilizer (urea).…”

Section: Discussionmentioning

confidence: 58%

Nitrogen and Potassium in Production, Nutrition and Water Use Efficiency in Wheat Plants

et al. 2016

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is a cereal used in food and feed for its nutritional properties. For nitrogen and potassium management, efficient use of water is required for greater availability and transportation of these nutrients. The objective of this study was to evaluate the effect of combinations of nitrogen and potassium doses in production, nutrition and water use efficiency in wheat. The experiment was held in a greenhouse with 8-dm 3 pots using Oxisol collected at a depth of 0-0.2 m under Cerrado vegetation. Base saturation was raised to 60%. The experimental design was a randomized block in a 5x5 factorial arrangement with five doses of nitrogen (0, 100, 200, 300 and 400 mg dm -3 ) and potassium (0, 90, 180, 270, 360 mg dm -3 ) with four replications. Soil moisture was maintained by an auto-irrigation system (3 kPa pressure). The experiment was collected at 95 days after plant emergence. We evaluated the dry mass of ears, shoots and roots, the total dry matter, nitrogen and potassium in grains, and the consumption and efficiency in water use. An analysis of variance and regression test at 5% probability was conducted using SAS statistical software (SAS Institute, Inc., Cary, North Carolina). The nitrogen and potassium alone increased the dry mass of ears by 31.47% and 20.91%, respectively. There was an interaction of nutrients on the dry mass of the shoots and the total dry matter. Potassium increases the concentration of nitrogen. Nitrogen and potassium promote gains in production, nutrition and water use efficiency.

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Section: Discussionmentioning

confidence: 58%

Nitrogen and Potassium in Production, Nutrition and Water Use Efficiency in Wheat Plants

et al. 2016

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“…A disponibilidade desse nutriente no solo está vinculada, entre outros fatores, à relação carbono/nitrogênio (C/N) dos resíduos vegetais, principalmente no sistema plantio direto, onde permanecem na superfície do solo (Araújo et al, 2005). No período compreendido entre o perfilhamento e o início da diferenciação do primórdio floral, por exemplo, a falta de N pode reduzir a formação de espiguetas (Sangoi et al, 2007).…”

Section: Introductionunclassified

“…Portanto, o conhecimento das interações entre manejo dos adubos verdes, doses de fertilizantes minerais nitrogenados e exigências nutricionais da cultura em sucessão torna-se imprescindível ao desenvolvimento de estratégias de manejo que aumentem seu aproveitamento pelas culturas. Araújo et al (2005) N-uréia pela cultura no manejo conjunto de uréia e crotalária, devido à maior disponibilidade de N no solo, que proporcionou o estreitamento da relação C/N do adubo verde e menor imobilização do nutriente do fertilizante na palha.…”

Section: Introductionunclassified

Adubos verdes e adubação mineral nitrogenada em cobertura na cultura do trigo em plantio direto

Nunes¹,

Souza

Mercante

2011

Bragantia

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ResumoObjetivou-se neste trabalho avaliar o efeito do cultivo de adubos verdes, associados a doses de nitrogênio (N) em adubação de cobertura, no desempenho agronômico da cultura do trigo em sistema plantio direto. O experimento foi realizado em Dourados (MS), Brasil, em delineamento de blocos casualizados, com os tratamentos dispostos em esquema de parcelas subdivididas e quatro repetições. As parcelas foram constituídas pelos adubos verdes: ervilhaca peluda (Vicia villosa), crotalária (Crotalaria juncea), mucuna anã (Mucuna deeringiana), lablabe (Dolichus lablab) e um tratamento-testemunha, em pousio. Nas subparcelas foram testadas quatro doses de N em cobertura: 0 (zero), 45, 90 e 135 kg ha -1 , utilizando a uréia como fonte de N. Foram realizadas avaliações de massa seca das coberturas vegetais, teores de N nos tecidos da parte área dos adubos verdes e nas folhas de trigo, altura de plantas, número de perfilhos produtivos por planta, tamanho da espiga, número de grãos por espiga, massa de mil grãos, peso hectolitro e produtividade. Concluiu-se que maiores produtividades na cultura do trigo são obtidas quando é cultivado após crotalária e ervilhaca peluda e que a resposta do trigo à aplicação de N mineral em adubação de cobertura varia em função da cultura antecessora.Palavras-chave: crotalária, ervilhaca peluda, lablabe, mucuna anã, Triticum spp. Green manures and mineral nitrogen topdressing fertilization of wheat crop under no-tillage AbstractThe objective of this work was to evaluate the effect of different green manures associated with levels of mineral nitrogen topdressing in the agronomic performance of wheat crop under no-tillage. The experiment was performed in Dourados, MS, Brazil, in randomized blocks experimental design, with treatments arranged in a split-plot scheme with four repetitions. The plots were constituted by hairy vetch (Vicia villosa), sunn hemp (Crotalaria juncea), velvet bean (Mucuna deeringiana), hyacinth bean (Dolichus lablab) and a treatment-control, in fallow. In the split-plot were tested four levels of mineral nitrogen top dressing: 0 (zero), 45, 90, and 135 kg ha -1 , using urea as source. Evaluations of cover crops shoot dry biomass, nitrogen contents in green manures shoot and in wheat leaves, plant height, number of productive tillers per plant, length of spike, number of grains per spike, one thousand-grains weight, hectoliter weight and yield were done. It was concluded that higher yields in wheat are obtained when it is grown after hairy vetch and sunn hemp and that the wheat yield response to mineral nitrogen top dressing application varies according to the preceding crop.

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“…Fenilli et al, (2008) found in the litter and in the soil 46.3% of applied N after a year of application of marked ammonium sulfate in a coffee plantation. Araujo et al (2005) reported 12.8% of NfGM in wheat aerial parts, applying 100 kg N ha -1 of C. juncea. Ovalle et al (2010) applied 68-194 kg N ha -1 with early and late legumes, respectively, supplementary to 40 kg ha -1 mineral N and found in grapevine leaves, 14 to 20% of NfGM.…”

Section: Evaluation In the Second Year Of Growth (December 2010; Aprimentioning

confidence: 99%

Nitrogen fertilization of coffee: organic compost and Crotalaria juncea L.

Araújo¹,

Rodrigues

et al. 2013

Rev. Ceres

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RESUMO Adubação nitrogenada de cafeeiros com composto e crotaláriaA resposta do cafeeiro aos adubos orgânicos é pouco estudada e, por isso, objetivou-se, neste trabalho, avaliar o efeito de diferentes doses de composto e de Crotalaria juncea L. sobre o crescimento, a produção e a nutrição nitrogenada dos cafeeiros. Os tratamentos foram: composto orgânico, nas doses de 25, 50, 75 e 100% da adubação recomendada, com ou sem a parte aérea de C. juncea. A C. juncea foi cultivada com N-NH 4 (2% de 15 N) e aplicada nos cafeeiros. A crotalária promoveu maior crescimento em altura e diâmetro de copa do cafeeiro. No 1º ano, o percentual de N derivado da crotalária atingiu 8,5% aos sete meses e 4,1%, aos quinze meses após a adubação. No 2º ano, foram atingidos 17,9% de N derivado da crotalária no início da colheita, cinco meses após a adubação. O aumento das doses de composto promove a elevação do pH, P, K, Ca, Mg, Soma de bases, CTCefetiva, saturação de bases e matéria orgânica, e redução da acidez potencial. O uso do isótopo 15 N permite a identificação da contribuição do N derivado da crotalária para o cafeeiro, com percentuais foliares de N derivado de Crotalaria juncea de 9,2 a 17,9%. Information concerning the response of coffee to organic fertilizers is scarce. This study evaluates the effect of different doses of compost and Crotalaria juncea L. on growth, production and nitrogen nutrition of coffee trees. The treatments consisted of compost at rates of 25, 50, 75 and 100% of the recommended fertilization, with or without the aerial part of C. juncea. C. juncea was grown with NH 4 -N (2% 15 N) and applied to coffee. The use of C. juncea increased growth in height and diameter of the coffee canopy. In the first year, the percentage of N derived from C. juncea reached 8.5% at seven months and 4.1% at fifteen months after fertilization. In the second year, the percentage of N derived from C. juncea reached 17.9% N at the early harvest, five months after fertilization. Increased rates of compost increased pH , P , K , Ca , Mg , sum of bases , effective CEC, base saturation and organic matter and reduced potential acidity. Palavras 15N allowed the identification of the N contribution from C. juncea with percentage of leaf N derived from Crotalaria juncea from 9.2 to 17.9%.

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Utilização de nitrogênio pelo trigo cultivado em solo fertilizado com adubo verde (Crotalaria juncea) e/ou uréia

Cited by 13 publications

References 18 publications

Nitrogen and Potassium in Production, Nutrition and Water Use Efficiency in Wheat Plants

Nitrogen and Potassium in Production, Nutrition and Water Use Efficiency in Wheat Plants

Adubos verdes e adubação mineral nitrogenada em cobertura na cultura do trigo em plantio direto

Nitrogen fertilization of coffee: organic compost and Crotalaria juncea L.

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