Suitable selection and you may development of substitute for heifers raises feabie oturum açma sorunu the opportunities one to heifers typing development software commonly consider early in the fresh new reproduction 12 months followed by improved stayability . Government procedures geared towards increasing very first breeding season reproductive triumph is discussed less than, and several was focused towards raising the percentage of heifers interacting with puberty till the start of the reproduction seasons. Such as for example techniques include the set of earlier and heavy heifers on weaning , health handling of heifers to arrive the precise percentage of their mature bodyweight from the start of the reproduction 12 months [sixteen, 22], reproductive region scoring so you’re able to screen heifers to possess puberty
29 d till the start of the breeding seasons , the brand new utilization of a great progestin-founded estrous synchronization protocol [18, 32], therefore the incorporation regarding expected progeny variations (EPDs) to select heifers with an increase of hereditary quality having fertility.
Period of heifers
Your selection of substitute for heifers which might be produced early in the calving year is a vital step so you can enhancing overall reproductive achievement. It’s expected you to definitely early produced heifers often enter the breeding year with increased morphological and physiological maturity than simply the more youthful herd friends.
During the a study by the Funston and acquaintances, heifers created in the first 21 d of calving season was basically heavy in the pre-reproduction than just heifers born regarding the 2nd or 3rd age of new calving year (296, 292 and you will 276 kilogram, respectively, ). In addition, 70% regarding early born heifers was indeed bicycling because of the start of its earliest reproduction 12 months, versus 58% and you will 29% from heifers born about 2nd and 3rd 21-d months, respectively. Continuar leyendo “Government practices to improve animal meat heifer reproductive success”