Produção de capins cultivados sob pastejo em diferentes lâminas de irrigação e estações anuais

Alencar, Carlos Augusto Brasileiro de; Oliveira, Rubens Alves de; Cóser, A. C.; Martins, C. E.; Cunha, Fernando França da; Figueiredo, José Luís Aguiar

doi:10.1590/s1415-43662009000600003

Cited by 10 publications

(10 citation statements)

References 14 publications

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“…These experiments were conducted in locals of low latitude and altitude: 18° 47' and 223 m for Governador Valadares, Minas Gerais, and 11° 45' and 287 m in Gurupi, Tocantins, respectively. According to Alencar et al (2009b), the winter temperature in these regions is higher than 15 ºC and under conditions of average winter annual temperatures superior to this value, pasture growth rate is not very reduced. In the first evaluations of the experiment during the rainy period, there was no difference between species, or there was higher production of dry forage mass of xaraes grass on the average of doses/strategies of N application in relation to tifton 85 (Table 5).…”

Section: Resultsmentioning

confidence: 97%

Nitrogen fertilization strategies for xaraes and tifton 85 grasses irrigated in the dry season

Queiroz

Menezes²,

Oliveira³

et al. 2012

R. Bras. Zootec.

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-An experiment was carried out to assess rates and nitrogen fertilization strategies on the forage yield using irrigation to supply the water deficit during the dry season. The grasses Cynodon spp cv. tifton 85 and Brachiaria brizantha cv. Xaraés were cultivated with nitrogen (N) at levels of 200 and 400 kg/ha according to strategies: 1) half dose applied during the rainy season (RS) and half during the dry season (DS); 2) 1/3 during the RS and 2/3 during the DS; 3) 2/3 during the RS and 1/3 during the DS; 4) all doses applied during the DS. In each season the dose was divided in three applications. Eleven harvests were conducted: six in the RS and five in the DS. When 2/3 of N was applied in the DS, forage yield in this period was statistically equivalent to those obtained in the RS in three of the five harvests for both 200 and 400 kg/ha of N. With 100% of N applied in the DS, the yield of four of five cuts of forage was similar to that obtained in the RS for both rates of N. The strategy of applying more N in the DS rather than in the RS was effective, keeping the yield steadily throughout the year. The application of 100% of the dose of 200 kg/ha N and 2/3 of the dose of 400 kg/ha N both in the dry period, under irrigation, promote uniform productions per harvest throughout the year.

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Section: Resultsmentioning

confidence: 97%

Nitrogen fertilization strategies for xaraes and tifton 85 grasses irrigated in the dry season

Queiroz

Menezes²,

Oliveira³

et al. 2012

R. Bras. Zootec.

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“…Considering this prerogative, Alencar et al (2009a) evaluated the productivity of dry matter of different grass cultivars, under the effect of different irrigation depths, in different seasons of the year, in Governador Valadares, MG, and observed that the irrigation depths affected the productivity of dry matter of the grasses and recommended the irrigation depths of 120, 120, 120, 80, 80 and 74 % of the reference depth for the grasses Mombaça, Pioneiro, Marandu, Xaraes, Tanzania and Estrela, respectively.…”

Section: Resultsmentioning

confidence: 99%

Dry matter yield, thermal sum and base temperatures in irrigated tropical forage plants

Silva¹,

Silva²,

Barreto³

et al. 2012

R. Bras. Zootec.

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“…Conforme alguns autores (LYRA et al, 2008;SILVA et al, 2008;ALBUQUERQUE Filho et al, 2009;ALENCAR et al, 2009;SANTANA et al, 2009;LIMA JÚNIOR et al, 2010;OLIVEIRA et al, 2011), o polinômio de segundo grau é uma das equações matemáticas mais utilizadas como função de produção; no entanto, as funções de produção devem, em geral, ser usadas em intervalos convenientes, isto é, sem exceder níveis do insumo economicamente razoáveis. Além disso, para a…”

Section: Figure 2 -Grain Yield (A) Real Evapotranspiration-etr (B) Aunclassified

Épocas de plantio e dose econômica de nitrogênio para o milho cultivado nos Tabuleiros Costeiros Alagoanos

Silva

Costa²,

Nascimento³

et al. 2016

AGRO@MBIENTE ON-LINE

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Objetivou-se, com este trabalho, determinar a dose econômica de adubação nitrogenada para o milho em quatro épocas de cultivo. O experimento foi conduzido em delineamento em blocos casualizados, em esquema de parcelas subdividas, com quatro repetições. As parcelas foram constituídas por quatro épocas de plantio (E1: 28/05, E2: 11/06, E3: 25/06 e E4: 22/07) e nas subparcelas foram aleatorizadas quatro doses de N (0, 75, 150 e 225 kg ha-1). A cultivar de milho foi a AG7088, sendo a produtividade medida na fase de grão farináceo. A produtividade agrícola foi de 8,0; 7,5; 5,9 e 6,3 t ha-1 em E1, E2, E3 e E4, respectivamente. A resposta do milho ao N foi significativa, em que a dose de 225 kg ha-1 de N proporcionou média de 4,0 t ha-1 a mais quando comparada ao cultivo sem adubação nitrogenada. Para o valor médio da saca de milho igual a R$ 30,00, a dose máxima econômica é 174, 163, 215 e 52 kg ha-1 de N para o plantio em 28/05, 11/06, 25/06 e 11/07 de 2014, respectivamente, e a dose econômica média é 151 kg ha-1.

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Produção de capins cultivados sob pastejo em diferentes lâminas de irrigação e estações anuais

Cited by 10 publications

References 14 publications

Nitrogen fertilization strategies for xaraes and tifton 85 grasses irrigated in the dry season

Nitrogen fertilization strategies for xaraes and tifton 85 grasses irrigated in the dry season

Dry matter yield, thermal sum and base temperatures in irrigated tropical forage plants

Épocas de plantio e dose econômica de nitrogênio para o milho cultivado nos Tabuleiros Costeiros Alagoanos

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