Análise de crescimento do capim Coastcross-1 sob adubação nitrogenada em duas idades de rebrotação

Pereira, Odilon Gomes; Oliveira, Marco Antônio de; Pinto, José Cardoso; Santos, Manoel Eduardo Rozalino; Ribeiro, Karina Guimarães; Cecon, Paulo Roberto

doi:10.1590/s1516-35982011001000008

Cited by 6 publications

(7 citation statements)

References 12 publications

(7 reference statements)

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“…The mean cut interval considering the entire experimental period was 44 days. Pereira et al (2011), on Coastcross-1 under different regrowth ages (28 and 42 days) and increasing levels of N (0 to 400 kg ha -1 N) concluded that, during the season of higher growth, intervals close to 28 days are more suitable for pastures receiving higher levels of N. Pastures without nitrogen fertilization, or with low supply levels, can be managed at longer intervals. The mean intervals obtained in the summer, especially in the second year, when the pasture was established, are close to those recommended by the authors for higher N levels, which may have favored the development of pastures, especiallly those inoculated.…”

Section: Resultsmentioning

confidence: 99%

<b>Forage yield of Coastcross-1 pastures inoculated with <i>Azospirillum brasilense

Aguirre

Olivo

Rodrigues

et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT. The high cost of nitrogen fertilizers increases the expenses in pasture-based animal production. The inoculation with plant growth-promoting bacteria is an alternative to reduce the costs. This study evaluated the forage yield of Coastcross-1 pastures inoculated with Azospirillum brasilense, fertilized with different levels of nitrogen and subjected to cuts. The experiment was a factorial randomized block design with three replications. The factors were the inoculation (without inoculation, inoculated only at planting and reinoculated in the second year), levels of nitrogen (0, 100 and 200 kg ha -1 year -1 N) and seasons (spring, summer, fall and winter) when cuts were made. Forage yield, forage accumulation rate, botanical and structural pasture composition were evaluated. Forage yield without nitrogen fertilizer in pastures was in the first year 9.1, 11.7 and 11.7 t ha -1 DM, and in the second year 8.6, 11.2 and 11.5 t ha -1 DM, for the factor inoculation, respectively. The forage yield rises with inoculation at pasture planting, without nitrogen fertilization. Reinoculation is not necessary.

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Section: Resultsmentioning

confidence: 99%

<b>Forage yield of Coastcross-1 pastures inoculated with <i>Azospirillum brasilense

Aguirre

Olivo

Rodrigues

et al. 2017

Acta Sci. Anim. Sci.

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“…In winter, ryegrass growth was late because it was overseeded, the soil was not disturbed, and Tifton 85 was present. During the other seasons, ~30-day grazing cycles sufficed to improve forage accumulation (Pereira, et al, 2011a) and favor forage persistence (Nascimento, 2006).…”

Section: Resultsmentioning

confidence: 99%

Productivity and crude protein concentration of Tifton 85 pasture-based mixed with pinto peanut

et al. 2019

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Mixed pasture grass-legume systems balance forage supply and minimize environmental impacts by reducing the need for nitrogen fertilization. Pinto peanut (Arachis pintoi Krap. and Greg. “Amarillo”) has several traits that are suitable for mixed pastures but have not yet been adequately explored. The aim of this study was to evaluate a mixture of Tifton 85 bermudagrass (Cynodon dactylon) and pinto peanut and evaluate forage yield, crude protein, and stocking density. A two-year study of three grazing systems was used with the following treatment combinations: (a) Tifton 85 (T) + 100 kg N ha-1 yr-1 + pinto peanut (T + PP+100); (b) T + 100 kg N ha-1 yr-1 (T + 100; control, pure grass); and (c) T + 200 kg N ha-1 yr-1 (T + 200; positive control, pure grass). In this study, forage yield, pasture characteristics and responses of lactating cows were evaluated. The experimental design was completely randomized with three treatments (grazing systems), three replicates (paddocks), and repeated measures (grazing cycles within seasons). Forage accumulation, crude protein concentration, and stocking rate were 15.1; 11.3 and 14.1 t DM ha-1 yr-1; 17%, 16%, and 17%; and 5.3; 4.9 and 6.1 AU ha-1 day-1, respectively. The grass-legume system yielded the best results.

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“…Para gramíneas de hábito de crescimento cespitoso, o IAF crítico, em que 95% da luz incidente seriam interceptadas, normalmente varia entre 3,0 e 5,0 (3,25) , sendo esta condição atendida a partir dos 77 e 63 dias de rebrota, respectivamente, com a aplicação da adubação e calagem + adubação. Gramíneas com maior habilidade competitiva são aquelas que desenvolvem uma arquitetura mais eficiente na interceptação de luz, através da rápida expansão de área foliar e colonização da camada superior do dossel, em decorrência do alongamento da bainha e entrenós do colmo (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24) .…”

Section: Resultsunclassified

“…A taxa absoluta de crescimento (TAC) foi calculada dividindo-se o rendimento de MS pelo respectivo período de rebrota. A taxa média de crescimento (TMC), taxa de crescimento relativo (TCR), taxa de assimilação líquida (TAL) e razão de área foliar (RAF) foram calculadas segundo Pereira et al (8) :…”

Section: Introductionunclassified

DINÂMICA DE CRESCIMENTO E PRODUTIVIDADE DE FORRAGEM DE Trachypogonplumosus SOB NÍVEIS DE CORREÇÃO DA FERTILIDADE DO SOLO E IDADES DE REBROTA

et al. 2016

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ResumoAvaliaram-se os efeitos de níveis de correção da fertilidade do solo (testemunha, calagem, adubação e calagem + adubação) e da idade de rebrota (21, 28, 35, 42, 49, 56, 63, 70, 77 e 84 dias) sobre a dinâmica de crescimento e rendimento de forragem de Trachypogon plumosus em Roraima. O aumento da idade de rebrota resultou em maiores rendimentos de matéria seca (MS), taxa absoluta de crescimento (TAC), taxa de assimilação líquida (TAL), razão de área foliar (RAF) e índice de área foliar (IAF), ocorrendo o inverso quanto à taxa média de crescimento (TMC). A gramínea mostrou-se responsiva à melhoria da fertilidade do solo. A calagem + adubação ou a adubação proporcionaram maiores rendimentos de MS (1.934 e 1.661 kg ha -1 ), TAC (36,6 e 31,5 kg ha -1 dia -1 ), TMC (32,5 e 27,9 kg ha -1 dia -1 ), TAL (4,993 e 4,152 g/m 2 ), RAF (152,9 e 140,9 cm 2 /g) e IAF (2,42 e 2,14). Para otimizar a eficiência de utilização da forragem produzida e reduzir perdas por senescência da gramínea, o período mais adequado de sua utilização, durante o período chuvoso, situa-se entre 56 e 63 dias com o uso de adubação e calagem + adubação e entre 63 a 70 dias para a testemunha e a calagem. Palavras-chave: área foliar; matéria seca; taxa de crescimento. AbstractWe assessed the effects of levels of soil fertility correction (control, liming, fertilization and liming + fertilization) and of regrowth ages (21, 28, 35, 42, 49, 56, 63, 70, 77, and 84 days) on growth dynamic and forage yield of Trachypogon plumosus in the Roraima´s savannas. Dry matter (DM) yields, absolute growth rate (AGR), net assimilation rate (NAR), and leaf area ratio (LAR) increased consistently with regrowth age, while the crop growth rate (CGR) was inversely proportional to regrowth age. The grass showed high responsivity to soil fertility improvement. Liming + fertilization or fertilization alone provided higher DM yields (1,934 and 1,661 kg ha -1 ), AGR (36.6 and 31.5 kg ha -1 .day), CGR (32.5 and 27.9 kg ha -1 .day), NAR (4.993 e 4.152 g/m 2 ), LAR (152.9 and 140.9 cm 2 /g),

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Análise de crescimento do capim Coastcross-1 sob adubação nitrogenada em duas idades de rebrotação

Cited by 6 publications

References 12 publications

<b>Forage yield of Coastcross-1 pastures inoculated with <i>Azospirillum brasilense

<b>Forage yield of Coastcross-1 pastures inoculated with <i>Azospirillum brasilense

Productivity and crude protein concentration of Tifton 85 pasture-based mixed with pinto peanut

DINÂMICA DE CRESCIMENTO E PRODUTIVIDADE DE FORRAGEM DE Trachypogonplumosus SOB NÍVEIS DE CORREÇÃO DA FERTILIDADE DO SOLO E IDADES DE REBROTA

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