More livestock producers are seeking natural alternatives to antibiotics and antimicrobials, and searching for supplements to enhance growth performance, and general animal health and well-being. Some of the compounds currently being utilized and studied are live yeast and yeast-based products derived from the strain Saccharomyces cerevisiae. These products have been reported to have positive e...

It is essential to quantify the potential of tropical grasslands to allow significant feed efficiency for grazing livestock in controlled conditions such as at pasture. We conducted a quantitative analysis of published studies reporting the experimental results of average daily gains (ADG) and diet characteristics obtained specifically under grazing conditions (17 publications and 41 experiment...

Twelve Nili-Ravi buffalo calves of age between 8-10 month and average body weight 112 ± 3.30 kg were randomly divided into three treatments (4 calves per treatment). Three isonitrogenous (16.14% CP) and isocaloric (66% TDN) dietary treatments: A) Calcium (Ca) 0.46% + Phosphorus (P) 0.31%; B) Ca 0.59% + P 0.31% and C) Ca 0.75% + P 0.31% on dry matter basis with Ca : P ratios of 1.5:1, 2:1 and 2....

The increase in the worldwide demand for dairy products, associated with global warming, will emphasize the issue of water use efficiency in dairy systems. The evaluation of environmental issues related to the management of animal dejections will also require precise biotechnical models that can predict effluent management in farms. In this study, equations were developed and evaluated for pred...

This study was conducted to evaluate the effects of the dietary ratio of ruminal degraded protein (RDP) to ruminal undegraded protein (RUP) and the dry matter intake (DMI) on the intestinal flows of endogenous nitrogen (N) and amino acids (AA) in goats. The experiment was designed as a 4×4 Latin square using four ruminally, duodenally and ileally cannulated goats. The treatments were arranged i...

The present experiment was conducted to evaluate the effect of simulated heat stress on digestibility and methane (CH4) emission. Four non-lactating crossbred cattle were exposed to 25°C, 30°C, 35°C, and 40°C temperature with a relative humidity of 40% to 50% in a climatic chamber from 10:00 hours to 15:00 hours every day for 27 days. The physiological responses were recorded at 15:00 hours eve...

An experiment was carried out to determine net microbial protein supply to ruminants from 15 tropical feeds. The study was done at Lyamungo research institute, on the slopes of Mt. Kilimanjaro, Tanzania in 1993. Twenty Bos Taurus Bos Indicus bulls were used in three periods in a completely randomised design. The initial 19 days of each period were for adaptation by the bulls to their new enviro...

this research was conducted to assess the effect of substituting corn for barley grain in diet on performance and reproductive characteristics of early lactating, holstein dairy cattle. a number of fifteen cows in their second lactation (26±11 dim) with 36.7±5.6 kg milk/d were investigated for 75 day (15 day for adaptation and 60 day for sampling) in a completely randomized design. the iso-ener...

the aim of this study was to compare conventional and organic diets in beef production. thirty-two dairy beef calves were used in 4 treatments: organic diet with three levels of forage [70% of organic diet with high amount of forage (orh), 55% of organic diet with medium amount of forage (orm), 38% of organic diet with low amount of forage(orl)] and conventional diet (con). the dry matter intak...

________________________________________________________________________________ Abstract To evaluate the effect of different ratios of non-fibre carbohydrates (NFC) to rumen degradable protein (RDP) on lactation responses, digestion and dry matter intake (DMI), nine multiparous mid-lactation Holstein cows, averaging 171 17 days in milk and 24.1 3.3 kg of milk/d were assigned to a 3 3 Latin squ...