Some factors of the time of breaking and training affecting racing performance in young trotters

vokKirjasto Aj-kEräiden opetuksen ja valmennuksen aikaisten tekijöiden vaikutus nuoren ravihevosen kilpailutuloksii

Influence of birth-month on age at first start and racing performance in young trotters

vokKirjasto Aj-

Feeding growing race horses in work

The athletic demands we put on horses in the racing industry require 1.5 to 3 year old, still growing horses, to be worked well above light exercise level. Therefore, the nutrient needs for such horses consist not only of maintenance, voluntary activity (play, group interaction) and growth but also of requirements for work. This leads to increased requirements for all nutrients. In practice, horse trainers alter energy intake of working youngsters according to body condition. The feeding levels are determined from experience and daily observation of horses and the choice of feed also often is made according to tradition and previous experience. Additional energy for growth and work is recommended for heat production when horses are kept in loose housing below thermal neutral temperature (Nordic countries). Although quality of protein is important, excess protein may have a detrimental effect on the performance of young horses. Exercise will increase load bearing qualities of the musco-skeletal system but if training and nutrition are not optimised, bucked shins, micro-fractures, haemorrhage and stress fractures may occur. Therefore, special attention needs to given to mineral and vitamin supply. There is a risk that young racehorses may receive diets deficient in calcium, relative to the increased need for accelerated bone metabolism at onset of training. In conjunction with this the requirements of vitamin D also increase in young horses entering training because of increased bone modelling. When feeding traditional straight grains a balancer or supplement are recommended. To maintain a healthy digestive tract and good welfare of young horses in training an adequate supply of structural fibre is required when stabled a level of at least 1.2% of BW as forage feed (DM) is recommended. In addition continued grazing during the growing and training period will help with temperament and prevention of behavioural problems but also with nutrient balance and digestive tract health.vo

Heritability of conformation traits and their relationships to racing performance in the Finnhorse trotter

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Desempenho e parâmetros sangüíneos de eqüinos em crescimento submetidos a dietas com diferentes níveis de farelo de canola Performance and blood parameters of growing equine fed diets with different levels of canola meal

Utilizando potros, avaliaram-se dietas em que a proteína do farelo de soja foi substituído em diferentes níveis (0; 35; 65 e 100%) pela do farelo de canola. As rações foram isoprotéicas ( 17% PB) e isocalóricas (4200 kcal/kg). Foram utilizados 16 eqüinos da raça Mangalarga, sendo oito machos e oito fêmeas, com média de dez meses e 218 kg PV inicial, consumindo um total de 2,5% PV, na matéria seca (MS). A dieta era composta por 40% de volumoso e 60% de concentrado. O delineamento experimental utilizado foi em blocos ao acaso, considerando quatro blocos e quatro tratamentos. Não se verificou efeito dos tratamentos sobre as variáveis de desempenho (ganho diário de peso vivo, altura na cernelha, perímetro torácico e perímetro da canela) e parâmetros sangüíneos (glicose e uréia) dos potros em crescimento. Nos concentrados para potros dos 9 a 11,5 meses de idade, o farelo de soja pode ser substituído pelo farelo de canola.<br>Diets composed by four different levels (0; 53; 65 and 100%) of canola meal replacing soybean meal crude protein (CP) were evaluated using foals. The diets were isoproteic (17% CP) and isocaloric (4200 kcal/kg). Sixteen Managalarga breed foals, eight males and eight females, averaging 10 months and 218 kg LW, fed a total intake of 2.5% LW on dry matter (DM) basis were used. The diet was composed by 60:40 forage to concentrate ratio. A completely block experimental design, with four blocks and four treatments, was used. There were no effect of treatments on the performance variables (average daily gain, wither height, heart girth and cannon bone circumference) and blood parameters (glucose and urea) of growing foals. In the concentrate for growing foals from 9 to 11.5 months old, the soybean meal can be replaced by canola meal