کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8501895 | 1553918 | 2018 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of microbial phytase supplementation of sorghum-canola meal diets with no added inorganic phosphorus on growth performance, apparent total-tract phosphorus, calcium, nitrogen and energy utilization, bone measurements, and serum variables of gro
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Two experiments were conducted with growing and finishing swine to determine the effect of phytase supplementation of sorghum-canola meal diets without added inorganic phosphorus (iP) on growth performance, apparent total-tract P, calcium (Ca), nitrogen (N), and energy utilization, bone strength, bone ash, serum Ca and P concentrations, and serum phosphatase activity. For Exp. 1, 42 crossbred barrows in individual metabolism cages were fed a P-deficient diet for 7 d before starting a 28-d experiment at 24.8â¯kg body weight (BW). Experiment 1 had 7 treatments that were a negative control (NC) diet supplemented with 0, 400, 800, 1200, or 1600â¯U of Aspergillus niger (AN) phytase/kg, a positive control (PC) diet, and the PC diet supplemented with 1200â¯U of AN phytase/kg. Fecal and urine collections were made from d 21-26. Blood samples were collected on d 0, 14, and 28. For Exp. 2, 126 growing-finishing crossbred swine with an initial BW of 21.6â¯kg were group-fed (3 pigs/pen) in 3 phases (grower, early-finisher, and late-finisher). Experiment 2 had 6 treatments that were a NC diet for each phase supplemented with 0, 200, 400, 600, or 800â¯U of AN phytase/kg and a PC diet. Fecal collections were made from d 49-54. Blood samples were collected on d 35, 63, and 91. For both experiments, 400â¯U of AN phytase/kg of diet was adequate (Pâ¯â¤â¯0.05) for growth performance compared with the PC treatment groups. For Exp. 1, apparent total-tract P absorption and retention plateaued at 1200â¯U of AN phytase/kg of diet (Pâ¯<â¯0.01), with fecal Ca and P excretion reduced 22.4% and 28.6%, respectively, compared with the PC treatment group. However, pigs fed the PCâ¯+â¯1200â¯U of AN phytase/kg absorbed and retained more P (g/d, Pâ¯<â¯0.01) than any other treatment group. For Exp. 2, apparent total-tract P absorption, bone strength, and bone ash weight plateaued at 600â¯U of AN phytase/kg of diet (Pâ¯<â¯0.01), with fecal P excretion reduced 29.4% compared with the PC treatment group. For both experiments, the AN phytase treatments did not increase Ca, N, or energy absorption (amount/d or % of intake), and had no effect on serum Ca and P concentrations, or the serum activity of alkaline phosphatase, total acid phosphatase, or tartrate-resistant acid phosphatase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Livestock Science - Volume 214, August 2018, Pages 180-188
Journal: Livestock Science - Volume 214, August 2018, Pages 180-188
نویسندگان
Trygve L. Veum, Jason Liu,