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Acúmulo de forragem e eficiência de utilização do Nitrogênio em pastagens de Panicum maximum Jacq. (Acesso BRA-006998) adubadas com Nitrogênio

2003; Editora da Universidade Estadual de Maringá (Eduem); Volume: 25; Issue: 2 Linguagem: Inglês

10.4025/actascianimsci.v25i2.2072

ISSN

1807-8672

Autores

Simony Marta Bernardo Lugão, Luís Roberto de Andrade Rodrigues, José Jorge dos Santos Abrahão, Euclides Braga Malheiros, Anibal De Morais,

Tópico(s)

Growth and nutrition in plants

Resumo

The work was carried out at Iapar in Paranavaí, state of Paraná, to evaluate the effect of nitrogen fertilization on access of BRA-006998, from 10/15/1998 to 05/03/1999. Four doses of N (0; 150; 300; and 450kg/ha/year) were applied to the pastures managed according to a rotational grazing. A randomized block design was used with split-plots, with N-doses studied in the plots and the GCs in the split-plots. The DM accumulation rate presented maximum value of 73.9; 96.2; 150.3; 189.6; and 129.9kg/ha/day (424; 438; 397; 385; 414kg N/ha/year, respectively) in the GCs 1, 2, 3, 4 and 5, respectively. The efficiency of N utilization in DM production did not differ between the treatments of 150 and 300kg N/ha/year, where the efficiency obtained with 150kg N/ha/year is higher than that obtained with 450kg N/ha/year.

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