SUMMARYTwo 49-d winter pen trials u

SUMMARY
Two 49-d winter pen trials using straight-run Ross × Ross broiler chickens at 0.667 ft2/bird
(0.062 m2/bird) were conducted on new litter to compare the efficacy of commercial mannan
oligosaccharide (MOS) as an alternative growth promoter to bacitracin methylene disalicylate
(BMD) followed by virginiamycin (VM). Feed phases were 0 to 21, 21 to 42, and 42 to 49 d. In
experiment 1, treatment effects were nonsignificant at 21 d. At 49 d, BMD (55, 55, or 27.5 ppm)
or MOS (1,000, 500, or 500 ppm) significantly (P < 0.05) improved body weight and feed conversion
ratio and increased feed expense per bird and net income (live value minus feed expense) per bird,
without affecting mortality, compared with the unsupplemented negative control (nCON). In
experiment 2, there were 6 dietary treatments: 1) nCON; 2) BMD (27.5, 55 ppm), VM (11 ppm);
3) MOS (1,000 ppm), BMD (55 ppm), VM (11 ppm); 4) BMD (27.5, 55 ppm), MOS (500 ppm);
5) MOS (1,000, 500, 500 ppm); and 6) BMD + MOS, VM + MOS. The BMD + MOS, VM + MOS
shuttle program gave best body weight, feed conversion, and mortality at 21 and 49 d of age
resulting in the lowest feed expense and highest net return per bird. It was concluded that MOS
supported live performance equivalent to BMD followed by VM and had an additive effect when
combined with the antibiotics.

Hasil (Bahasa Indonesia) 1:

RINGKASANDua musim dingin 49-d pena percobaan menggunakan lurus dikelola Ross × Ross ayam pedaging di 0.667 ft2/burung(0.062 m2/burung) dilakukan pada sampah baru untuk membandingkan efektivitas mannan komersialOligosaccharide (MOS) sebagai promotor pertumbuhan alternatif untuk bacitracin metilena disalicylate(BMD) diikuti oleh virginiamycin (VM). Feed fase yang d. 0 sampai 21, 21 hingga 42 dan 42-49 dipercobaan 1, efek pengobatan nonsignificant di 21 d. Di 49 d, BMD (55, 55, atau 27.5 ppm)atau MOS (1000, 500, atau 500 ppm) secara signifikan (P < 0,05) meningkatkan berat badan dan konversi pakanrasio dan peningkatan biaya pakan per burung dan laba bersih (hidup nilai minus biaya pakan) per burung,tanpa mempengaruhi kematian, dibandingkan dengan kontrol negatif unsupplemented (nCON). Dalampercobaan 2, ada perawatan Diet 6: 1) nCON; 2) BMD (27,5, 55 ppm), VM (11 ppm);3) MOS (1000 ppm), BMD (55 ppm), VM (11 ppm); 4) BMD (27,5, 55 ppm), MOS (500 ppm);5) MOS (1000, 500, 500 ppm); dan 6) BMD MOS, VM + MOS. BMD + MOS, VM + MOSAntar-Jemput program memberi terbaik berat badan, feed konversi, dan kematian di 21 dan 49 d usiamengakibatkan biaya pakan terendah dan tertinggi laba bersih per burung. Disimpulkan bahwa MOSdidukung pertunjukan setara dengan BMD diikuti oleh VM dan telah aditif efekdikombinasikan dengan antibiotik.