Four mature rumen and abomasal cannulated wethers were used in a 2 x 2 reversal experiment to study the effect of forage quality on daily quantity of abomasal protein and microbial protein synthesis. Diets were either high quality [HOo 16.4% crude protein (CP)] or low quality (LOo 9.3% CP) Coastal bermudagrass which provided 110.7 and 58.3 g CP intake daily, respectively. Non-ammonia CP reachin...

The current trial was conducted to investigate effects of tryptophan (Trp) supplementation in crude protein (CP) deficient diets on performance, gut development and immune responses in broiler chickens. A total of 420 day-old broiler chicks (Ross 308) were assigned to one of 6 dietary treatments, ‎comprising 5 replicates in a completely randomized design including: 1) ‎control diet (CTL) (diet ...

This study was conducted to assess the influence of dietary CP and ME on growth parameters of the French guinea fowl, a meat-type variety. In a 2 x 3 x 3 factorial arrangement, 297 one-day-old French guinea keets (162 females and 135 males) were randomly assigned to experimental diets comprising 3,050, 3,100, and 3,150 kcal of ME/kg, each containing 21, 23, and 25% CP from hatch to 4 wk of age ...

Awassi is a multi-purpose sheep breed. Awassi lambs being finished are usually offered an 18% crude protein (CP) diet. The growth rate of Awassi lambs is lower than other meat breeds. Therefore, this high content of dietary CP is questionable. The objective of this study was to estimate the optimum CP level for finishing Awassi lambs. Fifty male Awassi lambs (23.0+/-1.2kg) were fed five high co...

Use of low protein diets could have potential benefits on nitrogen emissions reduction as well as potential cost savings by reducing the utilization of high cost protein sources. An experiment was conducted with 160 Hy-Line W-36 hens which were randomly assigned to one of four dietary treatment groups. Corn-soy based diets varying in dietary crude protein (CP) supplemented with commercially ami...

Shirbot (Barbus grypus) as a species with high potential for aquaculture development recently propagated artificially in South Iran Aquaculture Research Center to extend the species diversity in polyculture system. To provide an effective economic diet for this species 9 experimental diets containing three crude protein levels (250, 300, and 350 g kg -1 ) and three metabolizable energy levels (...

We used a total of 504 commercial Single Comb White Leghorn hens (69 and 65 wk of age) in each of two experiments, and hens were induced to molt by feed withdrawal only. Feed withdrawal lasted for 12 and 11 d, and hens lost 26 and 25%, body weight in Experiments 1 and 2, respectively. All hens were then weighed, and seven replicate groups of 12 hens each were assigned to molt diet treatments. I...

While there are persistent rumors that the consumption of goat meat dishes increases blood pressure, there is no scientific evidence to support this. Two experiments were conducted to clarify whether or not blood pressure increases in conjunction with the consumption of goat meat dishes. In experiment 1, 24 Dahl/Iwai rats (15 weeks old, body weight 309.3±11.1 g) were evenly separated into 4 gro...

Twenty-four young Podolian bulls were used to evaluate the effect of rearing system (extensive vs. intensive) in relation to postmortem aging (11 and 18 d) on the eating quality of the meat, with the diet of outdoor animals adjusted to the protein content of the indoor system (15% CP) or to the minimum protein content required for satisfactory growth (12% CP). At 415 ± 9.35 (SE) d of age, with ...