RESUMO -Um experimento foi conduzido para verificar os efeitos da inclusão de três níveis (0, 8 e 12%) de farelo de algodão contendo 36% de PB (FA 36 ) e três níveis (0, 20 e 40 g/100 kg de ração) de sulfato de ferro (FeSO 4
Effects of feeding cottonseed meal with or without iron addition for starting piglets (15-30 kg)ABSTRACT -A trial was carried out to evaluate the effects of increasing levels (0, 8 and 12%) of cottonseed meal 36%(CM 36 ) and three inclusion levels (0, 20, and 40 g/100 kg) of ferrous sulfate -FeSO 4 (12% of CM diets) on the performance, plasma urea nitrogen (PUN) and hematological values of starting pigs (15-30 kg). Eighty pigs, barrows and females, averaging initial body weight of 14.81 ± 1.72 kg were allotted to a complete randomized block design with five treatments (0CM, 8CM, 12CM, 12CM+20FeSO 4 , and 12CM+40FeSO 4 ) and five replicates with two or three piglets per experimental unit. There was no effect of increasing CM 36 levels and ferrous sulfate addition on piglet performance.
Efeitos da inclusão de níveis crescentes de milheto (Pennisetum Glaucum(Effect of feeding increasing levels of pearl millet (Pennisetum glaucum (L.) R. Brown) grain for growing and finishing pigs ABSTRACT -A performance trial was carried out to evaluate the nutritional and economical analyses of feeding increasing dietary levels of pearl millet for growing and finishing pigs. Forty crossbreed pigs averaging initial body weight of 25.1 ± 2.1 kg were assigned to four treatments as a randomized blocks design with five replicates and two pigs (one barrow and one gilt) per experimental unit. The treatments contained the followign levels of pearl millet: 0, 25, 50 and 75%. No effects on daily feed intake (DFI), daily weight gain (DWG), and feed:gain ratio (FGR) in the growing phase was detected.However, in the finishing phase, quadratic effect on DWG and DFI was observed, showing that the inclusion of 26.44% of pearl millet increased DWG. The inclusion of pearl millet up to 75% in the diets of growing and finishing pigs meet animal requirements and it is economically viable for market value of 70% corn price.Key Words: alternative feed, carcass characteristics, economic analysis
IntroduçãoEm razão das constantes alterações nos preços do milho e do farelo de soja, principais componentes das rações para suínos, torna-se essencial o conhecimento do valor nutricional de alimentos alternativos que possam ser empregados como fonte de energia e proteína.O milheto grão tem sido estudado e utilizado em substituição ao milho na alimentação de suínos, tendo em vista o crescimento desta cultura no Brasil e sua boa adaptação às condições climáticas brasileiras.O teor de proteína do milheto geralmente varia de 12 a 14% (Walker, 1987) e seus teores de aminoácidos (lisina, metionina e treonina do milheto) são superiores aos do milho (Adeola & Orban, 1995). O teor de lisina na proteína varia de 1,9 a 3,9 g/100g (Ejeta et al., 1987;Hoseney et al., 1987). Nicolaiewsky & Prates (1987) observaram que a utilização do milheto em substituição ao milho como fonte energética pode ser feita sem limites, desde que obedecido o balanceamento energético, em decorrência do menor valor energético do milheto em relação ao milho.
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