Mode of limestone application on yield and quality of tanzania grass forage / Formas de aplicaÃÃo de calcÃrio na produÃÃo e qualidade de forragem do capim-tanzÃnia

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

This study was conducted in the surroundings of the Animal Science Department of the Federal University of Lavras (UFLA), in pasture of tanzania grass (Panicum maximum Jacq. cv. Tanzania 1) between months of September 2002 and March 2003 when three cuts were realized at height of 10 cm at each 42 days. The experimental design used was a randomized complete block, in factorial scheme 3 x 2 x 2, with four repetitions. There are three base saturations of soil BS 40, 60 e 80%; lime placement, either on the surface of the soil or incorporated and two limes with different LTRN (limeâs total relative neutralization) (88.15 and 107.73%). The doses of limestone were applied in September, 45 days before of cleaning cut. After this cut, a basal fertilization with 100 kg/ha of N and K2O, was applied in three doses after each cut, and 60 kg/ha of P2O5 were applied in single dose after cleaning cut. The treatment BS on second and third cuts, when applied in surface, increased the dry matter yield. The LTRN of 107.73% increased the tiller density at the first cut. The crude protein content, at second cut, increased when was used limestone with 107.73% incorporated. For BS 40% of the soil, on second cut, in limestone surface application, there was increase in P and K contents; on first cut, when was used limestone with 88.15% of LTRN in surface, these results were too achieved. For treatment incorporated, only, and BS of 60 and 80%, when was used limestone with 88.15% of LTRN, it was verified a increase in the Ca content, while to BS 60% the increase occurred too at 88.15% of LTRN. At third cut, when limestone was applied in surface, for elevating BS to 80%, increment of Ca content occurred when used limestone with 107.73%. For Mg content, at first cut, the small content was registered in response to limestone with 88.15% of LTRN applied on surface under BS 40% of soil. The total dry matter production, weight and height of tillers, leaf/stem ratio, neutral and acid detergent fiber variables were indifferent to applied treatments (P>0.05).

ASSUNTO(S)

zootecnia granulometry granulometria pastagem base saturation calagem saturaÃÃo por bases pasture liming

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