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Articles by R. Kriseldi
Total Records ( 2 ) for R. Kriseldi
  M.J. Schlumbohm , R. Kriseldi , J.A. England and C.N. Coon
  A continual concern in poultry nutrition is the negative effects that mycotoxins have on animal performance when contaminated grain is used as a dietary ingredient. Mycotoxin binders have been available for decades and are used in the feed as an effective approach to decreasing the intestinal absorption of several mycotoxins, especially when present in low dietary concentrations. The research reported herein with broiler breeders was conducted to test the safety of an effective mycotoxin binder, Improved Milbond-TX® (IMTX), when added to the diet in concentrations higher than the 0.25% which is recommended by the manufacturer. Beginning at 21 weeks of age a typical corn-soybean meal diet was supplemented with IMTX at concentrations of 0, 0.5 and 1.0%. These three dietary treatments were fed continuously from 21 to 35 weeks of age to 300 broiler breeder hens. Data were collected on egg production, egg weights, hatchability, fertility and chick weights from 24 to 35 weeks of age. Egg production, expressed as eggs per hen housed, was not significantly different (p>0.05) among the three dietary treatments. Also, no significant differences (p>0.05) were found among the dietary treatments for egg weights, hatchability, fertility and chick weights. Results from this study show that an accidental over-supplementation of a broiler breeder diet resulting in up to 4 times the recommended dietary concentration of IMTX is not expected to result in any negative effect on broiler breeder performance or of the weight of chicks at hatch.
  J.A. England , J.R. Moyle , D.E. Yoho , R.K. Bramwell , R.D. Ekmay , R. Kriseldi and C.N. Coon
  The effect of pullet growth curve on body conformation and subsequent reproductive performance and effect of breeder feed protein level on reproductive performance was determined. The cost effectiveness of the different programs was evaluated. Cobb 700e pullets were reared from day of age in floor pens. Each pen was assigned to one of two growth curves from 16 weeks of age to housing at 21 weeks of age. One growth curve followed a standard (SD) body weight curve and a second followed a lighter (LI) body weight curve. At 23 weeks of age, half of the hens from each of the growth curves were assigned to one of two breeder diets. Half of the hens were fed a low (LO)-protein (14%) breeder diet and half were fed a higher (HI)-protein breeder diet (16%) during the production phase. Pullet growth curve significantly affected body weight through 30 weeks of age. The protein level of the breeder feed significantly affected body weight at 35 and 40 weeks of age. Pullet growth curve affected body conformation, but did not affect age of first egg. Pullet growth curve did not affect egg weight. Protein level of the breeder feed significantly affected egg weight; hens fed the HI-protein diet laid heavier eggs. Egg production was not affected by pullet rearing growth curve (p = 0.0845) or protein level (p = 0.7348) of the breeder feed. Feeding a LO-protein diet resulted in feed cost savings. The feed cost of SD reared hens fed LO-protein diet was $0.03227 per hen less than for those fed HI-protein diets. The feed cost of LI reared hens fed LO-protein diet was $0.3616 per hen less than for those fed HI-protein diet.
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