Produtividade de capim Tifton 85 sob irrigação e doses de nitrogênio

Gomes, Éder Pereira; Rickli, Max Emerson; Cecato, Ulysses; Vieira, Camila; Sapia, Juliano Guilherme; Sanches, Arthur Carniato

doi:10.1590/1807-1929/agriambi.v19n4p317-323

Cited by 39 publications

(37 citation statements)

References 16 publications

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“…Possibly, in this situation the plant did not have available a suitable combination of water, nitrogen and potassium needed for full development. According to GOMES et al(2015), working with Tifton 85, the grass productivity generally responds linearly to nitrogen fertilization, while the water tension in the soil was kept below 35 kPa.…”

Section: Wlmentioning

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: Wlmentioning

confidence: 99%

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

et al. 2017

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“…The productive increment in irrigated pastures, compared with rainfed cultivation, is evidenced by many authors (Müller et al, 2002;Gomes et al, 2015;Sanches et al, 2015). Research results have demonstrated the possibility of maintaining, in irrigated pastures during the dry period, 40 to 50% of the animal stocking rate that is maintained in the spring/summer, while these values comprehend only 10 to 20% in the absence of irrigation (Alvares, 2001).…”

Section: Introductionmentioning

confidence: 99%

Pasture production under different irrigation depths

Antoniel

Prado

Tinos

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study aimed to evaluate the production of two pasture species, Brachiaria brizantha cv. BRS Piatã and Panicum maximum cv. Mombaça, under different irrigation depths. The experiment was carried out from May to December 2014, at the State University of Maringá, in the municipality of Cidade Gaúcha-PR, Brazil. The experiment was set out in a strip-plot design, with four replicates, six irrigation depths in the plot and two pasture species in the subplot. Irrigation depths were represented by a percentage of reference evapotranspiration (ET 0 ), which was estimated by the Penman-Monteith equation. Four pasture cuts were performed during the studied period and there were no differences between the yields of both evaluated pasture species; however, irrigation depths caused a quadratic response on pasture yield. The maximum values of dry matter yield of the pastures under irrigated conditions were 52.1, 41.6, 26.2 and 25.1% higher than under non-irrigated conditions, for the 1 st , 2 nd , 3 rd and 4 th cuts, respectively. Irrigation depths that applied water volumes close to ET 0 promoted considerable increases in pasture yield. Produção de pasto com diferentes lâminas de irrigação R E S U M OObjetivou-se, neste trabalho, avaliar a produção de duas espécies de pastagens, Brachiaria brizantha cv. BRS Piatã e Panicum maximum cv. Mombaça, submetidas a diferentes lâminas de irrigação. O experimento foi conduzido entre os meses de maio a dezembro de 2014, na Universidade Estadual de Maringá (UEM), em Cidade Gaúcha, PR. O delineamento experimental, com quatro repetições, foi em parcelas subdivididas em faixas com seis lâminas de irrigação na parcela e as duas espécies de pastagens na subparcela. As lâminas de irrigação foram constituídas por valores percentuais da evapotranspiração de referência (ET 0 ) calculada pela equação de Penman-Monteith. No período foram realizados quatro ciclos de corte observando-se que não houve diferença na produção entre as duas pastagens e que as respostas produtivas às lâminas de irrigação foram quadráticas. Ao comparar a produção máxima de matéria seca proporcionada pela irrigação com os valores produtivos não irrigados observaram-se, respectivamente para os 1º, 2º, 3º e 4º cortes, valores de 52,1, 41,6, 26,2 e 25,1% maiores que a produção de sequeiro. Lâminas aplicadas próximas a ET 0 proporcionaram aumentos consideráveis na produtividade das pastagens.

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“…Tifton 85 proporcionou maior produção de matéria seca. Gomes et al (2015) observaram que a irrigação promove maior produtividade de matéria seca de Capim Tifton 85, tanto na safra como na entressafra.…”

Section: Resultados E Discussõesunclassified

“…No entanto deve-se buscar estratégias ideais de manejo para otimizar o uso da água, devido conflitos de interesse pelo seu uso, como o consumo humano (FAGGION et al, 2009) Diversos trabalhos observaram que a produção de gramíneas são influenciadas pela disponibilidade de água. Entre os trabalhos podemos destacar os de Teodoro et al (2002) trabalhando com Capim Tanzânia (Panicum maximum), Marcelino et al (2003) e Gomes et al (2015) A escolha da gramínea é outro fator determinante na produção de pastagens. Entre as novas alternativas, a Brachiaria brizantha cv.…”

Section: Introductionunclassified