SciELO - Scientific Electronic Library Online

 
vol.61 issue5Protein contents for lactating dairy cows grazing elephant grassNutritional value of the hydrolyzed sugarcane with sodium hydroxide or calcium oxide author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Arquivo Brasileiro de Medicina Veterinária e Zootecnia

Print version ISSN 0102-0935

Abstract

SILVA, A.G. et al. Proteins fractions of mombaça grass submitted to nitrogen doses at two cutting heights. Arq. Bras. Med. Vet. Zootec. [online]. 2009, vol.61, n.5, pp. 1148-1155. ISSN 0102-0935.  http://dx.doi.org/10.1590/S0102-09352009000500018.

The protein fractions of mombaça grass submitted to four nitrogen doses (0, 100, 300, and 500kg.ha-1) at two cutting heights in dry and rainy periods were characterized and identified. A completely randomized block design, in 2x4 factorial scheme with four repetitions, was used. The crude protein (CP) and A, B1, B2, B3, and C protein fractions of mombaça grass cut at 0.20 and 0.40m were evaluated by the Cornell Net Carbohydrate and Protein System. There was significant difference (P<0.05) for CP according to the nitrogen (N) dose. The CP percentage increased as the N dose increased, in rainy period, averaging around 10%. There was difference for CP in function of season and cutting heights. The B1 and C fractions did not significantly differ concerning N dose and cutting heights. The A + B1 fractions were higher in the dry period in both heights (P<0.05). The N dose and cutting heights influenced in protein fractions composition.

Keywords : mombaça grass; Panicum maximum; nitrogen composites; nitrogen fertilization.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese