Adubação nitrogenada e estações anuais na produção de capins irrigados no leste mineiro sob corte

Alencar, Carlos Augusto Brasileiro de; Cunha, Fernando França da; Martins, C. E.; Cóser, A. C.; Oliveira, Rubens Alves de; Araújo, R. A.

doi:10.1590/s1519-99402013000300002

Cited by 6 publications

(9 citation statements)

References 11 publications

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“…The animal production system in pasture is the largest conditioning factor of competitiveness, but with a great challenge to be overcome: the maintenance of pasture supply in quantity and quality (ALENCAR et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Determination of Xaraés Grass Quality Submitted to Irrigation Water Levels and Nitrogen and Potassium Doses

et al. 2017

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ABSTRACT:In the correct pasture management, nutritional factors such as nitrogen and potassium fertilization play an important role in the forage production and quality. The aim was to evaluate the effects of the application of water levels, nitrogen and potassium doses in the Xaraés grass in the south of the State of Tocantins. For this, Xaraés grass was cultivated in the experimental field of the Federal University of Tocantins, municipality of Gurupi, TO. We used a mixture of fertilizer, combinations of N and K2O following the 1 N: 0.8 K2O ratio. To evaluate the effect of irrigation water levels and combinations of N and K2O doses in Xaraés grass, the plant height, the crude protein content and neutral detergent fiber were determined. The greatest height observed in the grass was 61.6 cm, with the dose application of 700 kg ha -1 yr -1 of N: 0.8 K2O and a water level of 120% of the ETc. The highest protein content was 11.7%, with the highest dose application of fertilizer and absence of irrigation. The highest fiber content in neutral detergent was 64%, with the estimated amount of 385.5 kg ha -1 yr -1 of N: 0.8 K2O and a water level of 120% of ETc. The conclusion was that the plant height, fiber detergent and crude protein content were influenced by the change in water level of irrigation and fertilizer doses. The values of plant height and crude protein increased with the increase of water levels and manure dose, while the fiber content of neutral detergent decreased with the increase of irrigation and varied little with the increase of fertilizer dose.

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Section: Introductionmentioning

confidence: 99%

“…According to ALENCAR et al (2013), the determination of irrigation interval and the amount of water applied in irrigation are crucial to the success of the crop production intensification.…”

Section: Introductionmentioning

confidence: 99%

Determination of Xaraés Grass Quality Submitted to Irrigation Water Levels and Nitrogen and Potassium Doses

et al. 2017

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“…Olivo y otros (33) ob-tuvieron, en un régimen de pastoreo, rendimientos de 23,4 a 34,3 Mg ha -1 año -1 . Alencar y otros (34) en cultivos bajo riego alcanzaron rendimientos de 28,2 a 35,6 Mg ha -1 año -1 con fertilización de 100 a 700 kg ha -1 N. La fertilización con N aumentó, en promedio, 50 % la producción de materia seca en las tres especies (Cuadro 1), aunque al analizar por especie no hubo efecto en A. donax. En P. virgatum la fertilización con N aumentó la producción de materia seca promedio anual en 67,3 kg ha -1 kg -1 N y en P. purpureum el aumento fue de 58,3 kg ha -1 kg -1 N. Según la bibliografía era esperable que existiese respuesta a la fertilización.…”

Section: Producción De Materia Secaunclassified

Respuesta a la fertilización con nitrógeno y fósforo en cultivos lignocelulósicos

Otero

Prieto

2019

Agrociencia

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Los cultivos lignocelulósicos se han desarrollado como alternativa en la matriz energética. Tres especies de interés en Uruguay son Arundo donax, Pennisetum purpureum y Panicum virgatum. El objetivo fue comparar la producción de estas tres especies, cuantificar la respuesta al agregado de nitrógeno, fósforo y sus efectos en el carbono del suelo (COS) luego de 6 años. Los cultivos se instalaron en 2007 y se evaluaron desde setiembre de 2011 a agosto de 2013. Los tratamientos de fertilización consistieron en: 1. testigo sin fertilización; 2. 100 kg ha-1 de N; 3. 100 kgha-1 de P 2 O 5 ; y 4. 100 kg ha-1 de N y de P 2 O 5. La producción fue mayor en el año 2013. Arundo donax produjo significativamente más biomasa área (18,6 Mgha-1 año-1) que P. virgatum (15,6 Mg ha-1 año-1) y P. purpureum (14,9 Mg ha-1 año-1). La fertilización con N aumentó 50 % la producción en las tres especies, aunque en A. donax el incremento no fue significativo. No hubo respuesta a la fertilización con P. Las diferencias debido a especies o en producción de biomasa debido a la fertilización no generaron diferencias de contenidos de COS luego de 6 años. Panicum virgatum, fue la especie que presentó menor contenido de humedad (16 %), lo que es una característica favorable como materia prima para la producción de energía. Los rendimientos fueron los esperables para nuestra región, con variabilidad anual atribuible a las condiciones climáticas y se pueden aumentar al fertilizar con N.

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“…Soil fertilization and irrigation use are considered management strategies that further pasture quality and productivity (ALENCAR et al, 2013). According to Pereira et al (2012), nitrogen fertilization benefits the pastures productivity, since, in general, the nitrogen element improves flow in tissues of tropical grasses, which favors the cultural growth.…”

Section: Introductionmentioning

confidence: 99%

Soil Physical Quality After Nitrogen Fertilizers Use in Irrigated Pasture of Tifton 85

Melo

Guimarães

Silva

et al. 2017

RSA

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-Tifton 85 (Cynodon sp.) is a forage crop widely used for the voluminous production, but it has also the potential to promote preservation or improvement in soil structural quality, when well managed. The aim of this work was to evaluate the soil physical quality in a rotational grazing area of Tifton 85 under irrigation in Prudente de Morais, MG, Brazil, due to the application of mineral and organic nitrogen fertilizers. The treatments included different forms of N supply: 400 kg ha -1 of urea; 400 kg ha -1 of bovine manure; 400 kg ha -1 of urea and manure, in proportion 1:1 and the control, without nitrogen fertilization. The following soil physical quality indicators were determined in the layers 0.0-0.05 m and 0.05-0.10 m after two years of N application: water retention curve, total porosity, macroporosity, microporosity, soil bulk density, available water capacity, bulk soil air capacity, soil matrix air capacity and relative water capacity. There were differences among the treatments, in both layers. In general, the treatments using bovine manure promoted greater water storage and availability, which was related to the increase of the microporosity, due to the organic matter effect. However, these same treatments presented a relative compaction, which was associated to the maintenance of higher soil moistures. It was concluded that, even under the effects of intensive grazing, there was generally adequate soil physical quality, but a special attention is recommended to the soil susceptibility to compaction.Keywords -water availability, soil aeration, organic fertilization, Cynodon sp.Resumo -O Tifton 85 (Cynodon sp.) é uma cultura forrageira muito utilizada para a produção de volumosos, mas também demonstra potencial para promover preservação ou melhoria da qualidade estrutural do solo, quando bem manejada. O objetivo deste trabalho foi avaliar a qualidade física do solo em área de pastejo rotacionado de Tifton 85 irrigado em Prudente de Morais, MG, Brasil, em função da aplicação de adubos nitrogenados de origem mineral e orgânica. Os tratamentos incluíram diferentes formas de suprimento de N: 400 kg ha -1 de ureia; 400 kg ha -1 de esterco bovino; 400 kg ha -1 de ureia e esterco, na proporção 1:1 e a testemunha, sem adubação nitrogenada. Determinaram-se os seguintes indicadores de qualidade física do solo nas camadas 0.0-0.05 e 0.05-0.10 m, após dois anos de manejo: curva de retenção de água, porosidade total, macroporosidade, microporosidade, densidade do solo, capacidade de água disponível, capacidade de aeração do solo, capacidade de aeração da matriz do solo e capacidade relativa de água no solo. Houve diferenças entre os tratamentos, em ambas as camadas. Em geral, os tratamentos com o uso de esterco promoveram maior retenção e disponibilidade de água, o que foi relacionado ao incremento da microporosidade, devido ao efeito da matéria orgânica. No entanto, esses mesmos tratamentos apresentaram uma relativa compactação, o que foi associado à manutenção de maiores umidades no solo. Concluiu-se ...

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Adubação nitrogenada e estações anuais na produção de capins irrigados no leste mineiro sob corte

Cited by 6 publications

References 11 publications

Determination of Xaraés Grass Quality Submitted to Irrigation Water Levels and Nitrogen and Potassium Doses

Determination of Xaraés Grass Quality Submitted to Irrigation Water Levels and Nitrogen and Potassium Doses

Respuesta a la fertilización con nitrógeno y fósforo en cultivos lignocelulósicos

Soil Physical Quality After Nitrogen Fertilizers Use in Irrigated Pasture of Tifton 85

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