Arquivo Brasileiro de Medicina Veterinária e Zootecnia
versão impressa ISSN 0102-0935
JAYME, D.G. et al. Quality of silages of sunflower genotypes (Helianthus annuus) confectioners and oil producers. Arq. Bras. Med. Vet. Zootec. [online]. 2007, vol.59, n.5, pp. 1287-1293. ISSN 0102-0935. http://dx.doi.org/10.1590/S0102-09352007000500028.
Quality of Sunflower silage was determined using genotypes Mycogen, Victoria 807, Victoria 627, M742, IAC Uruguai, V2000. The silos were opened on the 56th day of fermentation. The lowest dry matter values were for the genotypes Mycogen 93338 and V2000. In relation to the CP values, differences were not observed among five of the six genotypes. The genotypes with oil producer seed showed highest ether extract values, which were different from the confectionary variety, except IAC Uruguai. The observed values of neutral detergent fiber varied from 43.6% to 55.8%. For the acid detergent fiber concentrations the genotypes V2000 with 33.2% and Mycogen with 35.2% showed the lowest values. Differences for N-NH3/TN values were not observed. The pH mean value of the silages was 4.51. The highest values of in vitro dry matter digestibility were obtained for the silages of the genotypes V2000 (51.2%) and Mycogen 93338 with 54.5%. The silages from confectionary variety as well as the silages of sunflowers oil producers were classified as good quality for the evaluated parameters, demonstrating the potential of the sunflower as an option for production of silage at the time of summer post-harvesting.
Palavras-chave : confectionary; oil producer; quality of silage; sunflower.