The effect of supplementary Aspergillus niger phytase in diets for pigs on concentration and apparent digestibility of dry matter, total phosphorus, and phytic acid in different sections of the alimentary tract
Article Abstract:
Two T-cannulas were fitted in the duodenum and in the terminal ileum in each of 36 barrows fed with diets containing phytic acid and low intrinsic phytase activity with or without supplementary microbial phytase from Agpergillus niger, in a crossover design. The effect of the supplement at the two intestinal sites was determined by measurement of dry matter and total phosphorus digestibility and phytic acid degradation using analysis of variance. Positive influence of Aspergillus niger on dephosphorylation was indicated by the significant reduction of total phosphorous concentration in the ileal digesta and feces of pigs.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Growth and carcass characteristics of pigs selected for fast or slow gain inrelation to feed intake and efficiency
Article Abstract:
A total of 324 barrows of 4 generations of pigs were evaluated for fast or slow gain and were assigned at either ad libitum intake or limited-intake ration. Data included weekly weight and feed intake starting at on-test, ultrasonic backfat measurement at off-test, and carcass data. This allowed the estimation of lean tissue growth rate and lean tissue feed conversion using multivariate analysis of variance. Results showed intake was directly related to growth response and any additional intake resulted in fat deposition.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Effect of extrusion on the ileal and fecal digestibilities of lysine, nitrogen, and energy in diets for young pigs
Article Abstract:
The influence of heat treatment on lysine and protein digestibility, as well as gross energy utilization during digestion, was evaluated in ileally cannulated young barrows. Results showed that heat treatment did not affect lysine digestibility of soybean meal. On the other hand, lysine supplementation increased nitrogen and energy utilization in lysine-deficient diets.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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