Effects of dietary protein, calcium and phosphorus levels for growing and finishing swine.
نویسندگان
چکیده
A factorial experiment in a randomized complete block design was conducted with 192 pigs to evaluate the effects of two levels of d i e t a r y ca l c ium:phospho rus (.90/.70 or .65/.50%, respectively) in an 18% protein diet for growing swine (19 to 52 kg). Animals were then continued to market weight being fed one of two levels of calcium:phosphorus ( .65/.50 or .50/.40%, respectively) each at two protein levels (13 or 16%). Diets were composed of corn and soybean meal with dicalcium phosphate and limestone supplying the inorganic source of calcium and phosphorus. Measurements during each production phase evaluated the t reatment responses to animal performance, serum calcium and phosphorus (at 3-week intervals), and bone ash. During the growing period both gain and feed intakes increased (P<.01) when the higher calcium:phosphorus level was fed. There was a significant increase in the bone ash content of the sixth rib, femur, metacarpal, and proximal phalanx at the higher mineral level. Serum phosphorus values showed a slight tendency, although nonsignificantly, to increase with the higher mineral level.
منابع مشابه
Another Look at Calcium & Phosphorus Levels in Diets for Growing - Finishing Pigs
In addition to their role in the development and maintenance of the skeleton in pigs, calcium and phosphorus are involved in many other physiological processes. In practical swine diets, calcium can be considered an inexpensive nutrient. Phosphorus, on the other hand, is the third most expensive nutrient after energy and protein (amino acids). As the utilization of phosphorus in swine diets is ...
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متن کاملتأثیر مقادیر مختلف کلسیم و فسفر قابل دسترس جیره بر عملکرد مرغان مادر بومی اصفهان
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متن کاملتأثیر مقادیر مختلف کلسیم و فسفر قابل دسترس جیره بر عملکرد مرغان مادر بومی اصفهان
In a 3×3 factorial experiment, 90 72-week-old native breeder hens of Isfahan were kept in cages (one bird/cage). The effect of three levels of dietary calcium (3.27, 2.62, and 1.96%) and three levels of dietary available phosphorus (0.25, 0.20, and 0.15%) on egg production and egg shell traits were investigated. Each treatment contained five replicates of two birds (10 birds per treatment). The...
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ورودعنوان ژورنال:
- Journal of animal science
دوره 44 1 شماره
صفحات -
تاریخ انتشار 1977