This experiment was conducted to evaluate the effects of dietary different levels of hatchery wastes (HW) on performance, tibia ash and blood calcium and phosphorus concentrations in broiler chickens. Birds were fed a corn-soybean meal diet for 7 days. The experimental treatments included 3 dietary treatments containing 1.5, 3 and 4.5 percent HW, in addition to the control without hatchery wast...

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Leg problems in broiler chickens may partly be prevented by providing optimal circumstances for skeletal development during incubation. One of the factors demonstrated to affect bone development is eggshell temperature (EST), which provides a reliable reflection of embryo temperature. The present experiment aimed to investigate the effect of EST on development and asymmetry of the femur, tibia,...

A total of 600 male BUT Big 6 turkeys were randomly allocated to 60 pens, 10 birds in each. Each of six treatment groups consisted of 10 pens (replicates), 100 birds in each treatment, at a stocking density of 2.5 birds per m. The turkeys were reared until 112 days (16 weeks) of age, and they were fed diets based on corn, soybean meal and wheat. Group I (positive control PC) received a diet wit...

A 10- to 21-d chick bioassay was conducted to determine the absolute retention value (ARV) for 2 different defluorinated phosphates (DF-1 and DF-2) and a reagent grade dicalcium phosphate (DCP). The total and test P in excreta regressed on feed P levels were subjected to general straight-line (linear), 1-slope broken-line, 2-slope broken-line, and polynomial regression methods to find the best ...

this experiment was conducted to evaluate the effects of different levels of calcium (ca) and phosphorus (p) on performance native hens of khorasan province. a total of 400 native hens from khorasan station were used in a completely randomized design (factorial experiment) with 8 treatments, 5 replicates and 10 hens in each replicate of  age 26 to 50 weeks. eight experimental diets based on cor...

the effect of three different levels of dietary electrolyte balance (deb), in mean values of 114, 183 and 250 (meq/kg), on broiler performance was evaluated. a number of 486 arian male chicks were employed in a randomaized block design of three replicates and 54 chicks in each level replication. diets were available to chicks ad lib and in three dietary phases. serum na+,k+, cl- concentrations ...

Several bioassays were conducted with young chicks and pigs fed phosphorus (P)-deficient corn-soybean meal diets. With diets for chicks containing .62% Ca and .42% P (.10% available P), graded doses of a citric acid + sodium citrate (1:1, wt:wt) mixture (0, 1, 2, 4, or 6% of diet) resulted in linear (P < .01) increases in both weight gain and tibia ash. Relative to chicks fed no citric acid, ti...

Male broilers (n = 416) were used to compare the efficacy of providing dietary phytase either as a commercial supplement or as a recombinant protein in transformed soybean. From 7 to 21 d of age, broilers were fed a basal diet containing 0.20% nonphytate P (nP) with additional supplementation by fungal phytase as Natuphos or as raw transformed soybeans expressing recombinant phytase at 400, 800...

Eggshell and bone quality were investigated in 72 weeks of age (WOA) Lohmann Brown Dekalb White raised at rearing spacing allowance (SA) 247 299 cm2/bird from day 0 to 16 transferred common SA (755 cm2/bird) for lay cycle. thickness (EST), breaking strength (ESBS), along with tibia femur weight, (BS), length, ash measured WOA. Strain did not interact on any above parameter (P &gt; 0.05). Hens r...