Protein and energy utilization by cockerels fed four different commercial diet

Sixteen barrows and 16 gilts in experiment 1 were fed diets that contained 10% by weight cornstarch, tallow, soybean oil (SBO) or rapeseed oil (RSO) and 20% protein (N × 6.25) from 8 to 23 kg and 18% protein from 23 to 45 kg liveweight. In experiment 2, 32 barrows received the same diets except that the SBO treatment was replaced by 10% cornstarch diets containing 19% protein from 8 to 23 kg and 16% protein from 23 to 45 kg. All pigs were fed a commercial diet that contained 15% protein from 45 to 90 kg liveweight. Source or substitution of fat for cornstarch had no significant effect on weight gain during the growing (8–45 kg) or subsequent finishing (45–90 kg) periods, on the carcass measurements obtained after slaughter at 90 kg liveweight, on average daily feed intake, efficiency of feed utilization or of energy utilization; however, the number of degrees of freedom (df = 7) were small for the latter three parameters. Level and source of dietary fat did affect the fatty acid composition, as determined by gas–liquid chromatography, of the backfat at 45 and 90 kg. The ratios of unsaturated to saturated fatty acids were significantly higher at 45 kg in the fat from pigs fed the tallow or RSO diets than those fed the cornstarch diets. A similar trend remained at 90 kg. The backfat of pigs fed the RSO diet contained 7.6 and 7.8% of erucic and eicosenoic acids, respectively, at 45 kg and still 2.3 to 3.7% of the total at 90 kg, even though the diet fed between 45 and 90 kg liveweight did not contain these fatty acids.

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Protein and energy utilization of growing rats fed on the diets containing intact or partially hydrolyzed guar gum

Comparative Biochemistry and Physiology Part A Physiology ◽

10.1016/0300-9629(94)90303-4 ◽

1994 ◽

Vol 107 (1) ◽

pp. 255-260 ◽

Cited By ~ 8

Author(s):

Takahashi Hidehisa ◽

Sung Ik Yang ◽

Kim Mujo ◽

Yamamoto Takehiko

Keyword(s):

Guar Gum ◽

Energy Utilization ◽

Growing Rats ◽

Protein And Energy Utilization ◽

Partially Hydrolyzed Guar Gum

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Protein and Energy Utilization of Black Soldier Fly Maggot at Different age on Chicken

Jurnal Peternakan Integratif ◽

10.32734/jpi.v8i1.4375 ◽

2020 ◽

Vol 8 (1) ◽

pp. 52-58

Author(s):

Nicolas Gomgom Tua Marbun

Keyword(s):

Research Result ◽

Nitrogen Retention ◽

Protein Digestibility ◽

Metabolizable Energy ◽

Energy Utilization ◽

Study Program ◽

Black Soldier Fly ◽

Randomized Design ◽

Apparent Metabolizable Energy ◽

Protein And Energy Utilization

This study aims to determine the efficient use of protein and energy of Black Soldier fly larvae at different age levels on chicken. This research was conducted at Jl. RK, Desa Namo Bitang, Kecamatan Pancur Batu Kabupaten Deli Serdang, North Sumatra. Animal Husbandary Study Program, Faculty of Agriculture, Universitas Sumatra Utara, Medan. The design of this study was a completely randomized design (CRD) with 4 treatments and 5 replications. The treatment consisted of P0, P1, P2, and P3 (larvae 14, 21, 28, and 35 days old). Observed variables were protein digestibility, nitrogen retention and apparent metabolizable energy.The results showed that the treatment had a significant effect (P<0,01) on protein digestibility, nitrogen retention and apparent metabolizable energy. Based on research result it can be concluded that maggot of Black soldier fly more efficient at the age between 24-25 days.

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