A considerable volume of research in the energy metabolism of dairy cows has been undertaken over the last 2 decades. The purpose of the present review is to reflect on the impact of these studies on the UK metabolisable energy (ME) system, and other net energy (NE) systems, and validate these systems using published calorimetric data. The NE requirement for maintenance (NE ) in the UK ME syste...

Ninety-six bulls, one-third each being Charolais (614lb), Hereford (600 lb) and Hereford-Angus crossbreds (566Ib) were implanted with (1) nothing, (2) Compudose, (3) Synovex or (4) Ralgro. The latter two groups were reimplanted on day 75. Bulls were placed in 12 pens and were fed a high concentrate diet for 118 days. Impants increased liveweight gains by a mean of 34 pounds (6.2 percent) and ca...

Considerable experimental evidence suggests that supplementation with protein can enhance both immune responsiveness and resilience of sheep to infection with gastrointestinal nematode parasites. Practical application of this knowledge is an objective of the Australian Sheep Industry CRC. Field trials were carried out in NSW, WA and SA targeting the most susceptible classes of sheep, i.e., youn...

nt matter & 2008 IAgrE. temseng.2007.08.008 thor. Tel.: +1 256 372 4158; : [email protected] Machine vision-based weighing of pigs is a non-intrusive, fast and relatively accurate approach that could reduce stress on both the animal and the stockman during the weighing process. An image-based walk-through system was developed in this study for pig liveweight approximation without having to re...

The productivity of a perennial lupin/cocksfoot mix was compared to that of lucerne in summer dry conditions at Lincoln University, Canterbury, New Zealand. The pastures were planted in December 2013 and rotationally grazed by ewe lambs in autumn 2014 (Year 1), and by ewe hoggets in spring-summer and ewe lambs in autumn of 2014/2015 (Year 2) and 2015/2016 (Year 3). For lupin/cocksfoot relative ...

The effect of feeding two different supplements (perennial ryegrass or plantain baleage) on urinary nitrogen (N) excretion from dairy heifers (8 months old, 180 kg liveweight (LW)) grazing kale was examined in two successive winters. Heifers (n=90 and 80 in Years 1 and 2, respectively) were offered 2.5 kg DM kale/100 kg LW/day and approximately 3 kg DM/heifer/day of either perennial ryegrass or...

An integrated management system involving cattle, ewes and lambs developed to minimise levels of parasitic nematode contamination of pasture was evaluated in a 2-year (1989-1991) study. Four experimental farmlets were managed as self-containcd units over a May-May year. Over the two years, stocking rate averaged 15 su/ha and cattle:sheep ratio 35:65. Three treatments (lambs regularly drenched, ...