In this study samples of feedstuffs were collected from different feed mills and animal farms located in central Italy and analyzed for ionophore coccidiostat residues at carry-over levels by liquid chromatography-mass spectrometry. Since unavoidable cross-contamination of feedstuffs may occur during their production as well as distribution and storage, the collection of samples covered all the...

Mycobacterium bovis, the causative agent of bovine tuberculosis, has become established in free-ranging white-tailed deer Odocoileus virginianus in northeastern Michigan. The practice of supplemental feeding of white-tailed deer during the winter is believed to contribute to transmission of M. bovis between deer. The current study was conducted to determine the ability of M. bovis to survive on...

The present study was aimed at determining rumen phosphorus availability of some feedstuffs assessed with the nylon bag technique: forage (alfalfa), cereals (control-C wheat, formaldehyde treated-FT wheat, barley, corn), cereal by-products (wheat bran, wheat distillers, corn distillers) and meals (C and FT soya bean meals, rapeseed meals and sunflower meals). Rumen phosphorus availability was n...

The study was conducted to ascertain the potential feedstuffs available for livestock management in three senatorial districts of Cross River State, Nigeria. A total of 192 structured questionnaires were administered to sole livestock and crop-livestock farmers in 24 villages at eight per village. At collection only 176 were retrieved from the respondents representing the farm households. Data ...

Not all of the dietary amino acid that is included in standardized ileal digestibility is metabolically available for protein synthesis. A rapid method was developed to determine metabolic amino acid availability in feedstuffs for protein synthesis. Using the indicator amino acid oxidation technique, a change in phenylalanine oxidation, which is inversely proportional to protein synthesis, was ...

There is sufficient evidence that ileal rather than fecal amino acid digestibility values provide a more reliable estimate of protein digestion and amino acid absorption. In addition to differences in ileal amino acid digestibility values between feedstuffs there are large differences in ileal amino acid digestibility values within the same feedstuff. Furthermore, in addition to different proce...

small-scale dairy farming in bangladesh is constrained mostly due to acute shortage, high price and seasonal fluctuation of energy and protein supplements. poor economic conditions of dairy farmers do not allow them to purchase adequate conventional energy and protein supplements. locally available non-conventional energy and protein sources can be used as alternatives, cheaper than conventiona...

Abstract The California Net Energy System (CNES) was developed more than 50 yr ago and partitions energy into NEm NEg, both of which can be calculated for feedstuffs as a cubic function dietary ME. Recovered (i.e., NEg) from requirements, dry matter intake (DMI), shrunk body weight gain (SWG). Thus, if composition reliably estimated relative to maturity, SWG DMI used calculate performance-adjus...

I M P R O V I N G the utilization of urea nitrogen by ruminants has been the goal of many investigations. One approach, as exemplified by the study of Karr et al. (1965), has involved the addition of certain feedstuffs, which are thought to be sources of "rumen stimulatory" factors, to the diet with the hope of increasing microbial protein synthesis. Two examples of such feedstuffs are corn dis...