Influência da irrigação, da densidade de plantio e da adubação nitrogenada nas características morfogênicas, estruturais e de produção do capim-tanzânia

Magalhães, Marcela de Azevedo; Martuscello, Janaína Azevedo; Fonseca, Dilermando Miranda da; Oliveira, Ivanna Moraes de; Freitas, Fabrício Paiva de; Faria, Dawson José Guimarães; Oliveira, Rubens Alves de; Júnior, José Ivo Ribeiro

doi:10.1590/s1516-35982011001100005

Cited by 10 publications

(14 citation statements)

References 14 publications

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“…The Pasture, due to its low production cost compared to the concentrates, represents the most practical and economical way to feed the cattle, it forms the livestock farming basis in Brazil (MAGALHÃES et al, 2011).However, the economic results obtained by most farmers, with the production in pasture, can be considered very modest in relation to the great potential of the country. 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%

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%

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

et al. 2017

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“…However, the higher frequency of cuts in higher doses may have influenced the pseudostems rate of elongation, because plants from plots that received higher dose of nitrogen sprouted and developed their morphological components faster, staying longer in a position of shading themselves, thereby increasing the total dry mass of pseudostems. Greater accumulation of TDMPS with nitrogen was also observed by Martuscello et al (2004) in Massai grass and by Magalhães et al (2011), in Tanzania grass. The reduction in the production of TDMPS with the increase of density was contrary to the results described in the literature, since higher densities result in increased stem elongation of plants, because of bigger competition for light.…”

Section: Resultsmentioning

confidence: 66%

“…Magalhães et al (2011) also observed the effect of plant densities in the establishment of Tanzania grass. In this experiment with Mombasa grass, the largest number of plants per unit area resulted in the shortest period of plant growth to reach 95% of the lowest densities in relation to light interception.…”

Section: Resultsmentioning

confidence: 86%

Biomass accumulation in mombasa guineagrass plants under different levels of nitrogen supply and plant densities

et al. 2012

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-The objective of this study was to evaluate the effect of different levels of nitrogen supply and plants densities in the productivity of mombasa guineagrass (Panicum maximum) in the period of establishment. The design was of completely randomized blocks, with 12 treatments and three repetitions, with four nitrogen supplies (absence of application, 80, 160 and 320 kg/ha.year) and three plant densities (9, 25 and 49 plants/m²). The plot was cut at 30 cm from the ground when the sward high intercepted 95% of light. The following items were evaluated: sward height at 95% light interception, interval and number of cuts, dry mass production, total dry mass of leaves, stems and dead material and the morphologic composition. Nitrogen increased the dry mass production and the dry mass of stem in winter and summer, and decreased in the fall. The total dry mass of leaf presented decrease of 19% in the summer between the smallest and biggest densities in the 320 kg/ha. The dry mass of dead material had negative effect of the density in the fall. The leaf percentage increased 88% between the smallest and largest nitrogen level at the plant density of 49 plants/m 2 . Only density influenced the sward height in the condition of 95% of light interception. The number of cuts increased with nitrogen levels in the fall, spring and summer, while the interval of cuts decreased with fertilization in the spring and summer. Nitrogen increases the production of mombasa guineagrass in each cycle.

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“…Ausência de diferença na TApF e no FIL também foi observada por Magalhães et al (2011) O efeito da adubação nitrogenada sobre a TApF é apresentado de forma variável na literatura e, de acordo com Gastal e Nelson (1994), é pequeno o efeito do nitrogênio sobre esta variável em gramíneas com hábito de crescimento cespitoso. Roma et al (2012) observaram efeito da adubação nitrogenada sobre a TApF em capim-Tanzânia adubado com nitrogênio (zero, 100, 200 e 300 kgN ha.ano -1 ) e, em pastejo com lotação intermitente (crescimento livre das plantas).…”

Section: Resultsunclassified

Características morfogênicas do capim-Tanzânia consorciado com Estilosantes Campo Grande ou adubado com nitrogênio sob pastejo

et al. 2015

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ResumoObjetivou-se avaliar as características morfogênicas e estruturais do capim-Tanzânia (Panicum maximum cv. Tanzânia) consorciado com Estilosantes Campo Grande (Stylosanthes capitata e Stylosanthes macrocephala) ou adubado com nitrogênio. O pasto foi manejado sob lotação contínua e taxa de lotação variável. Foi utilizado delineamento experimental em blocos ao acaso com parcelas subdivididas, com três repetições. Os tratamentos foram: capim-Tanzânia + Estilosantes; capim-Tanzânia + 75 Kg N.ha.ano . Foram utilizados ureia e nitrato de amônia como fonte de nitrogênio. As avaliações morfogênicas foram realizadas na primavera e no verão. Foram avaliados 15 perfilhos por piquete, duas vezes por semana, durante quatro semanas por estação em estudo. As características morfogênicas, exceto a taxa de alongamento foliar (TAlF), não foram influenciadas pela adubação nitrogenada ou consórcio com Estilosantes. Os maiores valores para esta variável foram observados na primavera, nas pastagens adubadas. Desta forma, conclui-se que a adubação nitrogenada influencia a taxa de alongamento foliar (TAlF) do capim-Tanzânia, e este quando é cultivado em consórcio com o Estilosantes Campo Grande apresenta características morfogênicas semelhantes quando adubado com nitrogênio, à excessão da taxa de alongamento foliar. Palavras-chave: Consorciação, lotação contínua, morfogênese, Panicum maximum, taxa de alongamento foliar AbstractThis study aimed to study morphogenic and structural characteristics of Tanzania grass (Panicum maximum cv. Tanzania) intercropped with Estilosantes Campo Grande (Stylosanthes capitata and Stylosanthes macrocephala) or fertilized with nitrogen. The pasture was managed under continuous 1 Pós-Doutorando

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Influência da irrigação, da densidade de plantio e da adubação nitrogenada nas características morfogênicas, estruturais e de produção do capim-tanzânia

Cited by 10 publications

References 14 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

Biomass accumulation in mombasa guineagrass plants under different levels of nitrogen supply and plant densities

Características morfogênicas do capim-Tanzânia consorciado com Estilosantes Campo Grande ou adubado com nitrogênio sob pastejo

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