<p><img src="images/Ca.jpg" alt="" /></p>
<p style="text-align: justify;"><span id="result_box" lang="fr"><span class="hps">Le squelette</span> <span class="hps">est composé de</span> <span class="hps">35</span><span>% de calcium</span><span>.</span> <span class="hps">En outre</span>, le calcium <span class="hps">est nécessaire pour</span> <span class="hps">le fonctionnement normal des</span> <span class="hps">muscles et</span> <span class="hps">des glandes.</span> <span class="hps">Plus particulièrement</span><span>,</span> <span class="hps">chez les jeunes chevaux,</span> les <span class="hps">carences en calcium</span> <span class="hps">comme les excès</span> <span class="hps">peuvent</span> <span class="hps">conduire à un développement</span> <span class="hps">anormal du squelette</span> <span class="hps">(voir</span> <span class="hps">l'aide en ligne</span> <span class="hps">pour le calcium</span><span>)</span><span>.</span> <span class="hps">Trop de calcium</span> <span class="hps alt-edited">réduira</span> <span class="hps">l'absorption</span> <span class="hps">d'un</span> <span class="hps">certain nombre de minéraux</span><span>, dont le fer</span> <span class="hps">et le zinc</span><span>.</span> <span class="hps">Les bonnes sources de</span> <span class="hps">calcium pour</span> <span class="hps">le cheval</span> <span class="hps">sont le foin</span> <span class="hps">de trèfle</span><span>,</span> <span class="hps">de luzerne et de</span> <span class="hps">la plupart des mélanges</span> <span class="hps">de concentrés</span> <span class="hps">commerciaux</span> <span class="hps">qui contiennent</span> <span class="hps">6-14</span> <span class="hps">g</span> <span class="hps">Ca</span> <span class="hps">/</span> <span class="hps">kg</span><span>.</span> <span class="hps alt-edited">Le foin de graminées</span> <span class="hps alt-edited">voit</span> <span class="hps alt-edited">sa teneur en</span> <span class="hps">calcium</span>&nbsp; varier <span class="hps">de 1,5</span> <span class="hps">à</span><span></span> <span class="hps">15</span> <span class="hps">g</span> <span class="hps">Ca</span> <span class="hps">/</span> <span class="hps">kg</span> <span class="hps atn">(</span><span>si vous achetez</span> <span class="hps">le foin</span> <span class="hps alt-edited">en gros</span><span>,</span> <span class="hps alt-edited">envisager</span> <span class="hps alt-edited">de le faire</span> <span class="hps alt-edited">analyser)</span><span>.</span></span></p>
<p><br /><br />Entretien : Ca (g/j) = 0.04*PC</p>
<p style="text-align: justify;"><br />Les jeunes chevaux en croissance : les besoins en calcium sont calculés à partir des besoins d'entretien avec une allocation supplémentaire pour la croissance. Typiquement, un jeune cheval va utiliser 16 g Ca par kg de poids acquis. Avec une capacité d'absorption digestive de 50% du calcium, le régime alimentaire doit fournir 32 g de Ca / kg de poids acquis.</p>
<p style="text-align: justify;"><br />Ca (g/j) = 0.04*PC + 32*PAJ <br /><br /><span id="result_box" lang="fr"><span class="hps">Les jeunes</span> <span class="hps alt-edited">les chevaux au travail</span> <span class="hps">ont besoin d'un</span> <span class="hps">apport</span> <span class="hps">supplémentaire</span> <span class="hps">de calcium</span> <span class="hps alt-edited">qui est déterminé par rapport aux</span> <span class="hps alt-edited">besoins</span> <span class="hps">d'entretien</span> <span class="hps">:</span></span><br /><br />Ca (g/j) = (0.04*PC + 32*gain journalier) * (ED pour les chevaux à l'entrainement / ED pour les chevaux non entrainés) <br /><br /><span id="result_box" lang="fr"><span class="hps alt-edited">Gestation</span><span class="alt-edited"> :</span> <span class="hps">les juments</span> <span class="hps alt-edited">gestantes</span> <span class="hps">ont besoin de calcium</span> <span class="hps alt-edited">supplémentaire au cours</span> <span class="hps alt-edited">du 9ème au 11ème</span> <span class="hps">mois</span>.</span><br /><br />Mois 1-8: Ca = 0.04*PC<br />Mois 9-11: Ca = 7.95 * ED (MJ) <br /><br /><span id="result_box" lang="fr"><span class="hps">Production de lait</span><span class="alt-edited"> :</span> <span class="hps">La teneur en calcium</span> <span class="hps alt-edited">du</span> <span class="hps">lait de jument</span> <span class="hps alt-edited">baisse pendant la lactation</span> <span class="hps">de</span> <span class="hps alt-edited">environ</span> <span class="hps">1,2 g /</span> <span class="hps">kg</span> <span class="hps">à 0,8</span> <span class="hps">g</span> <span class="hps">/</span> <span class="hps">kg</span><span>.</span> <span class="hps">Lorsque</span> <span class="hps alt-edited">la production de lait est de </span> <span class="hps">15 kg /</span> <span class="hps alt-edited">j </span> <span class="hps alt-edited">, une</span> <span class="hps alt-edited">jument</span> <span class="hps">qui a absorbé</span> <span class="hps">50</span><span>% du calcium</span> <span class="hps alt-edited">dans son alimentation</span> <span class="hps alt-edited">aura besoin</span><span>,</span> <span class="hps alt-edited">en plus des</span> <span class="hps">20</span> <span class="hps">g</span> <span class="hps">/ j</span> <span class="hps">pour l'entretien,</span> <span class="hps alt-edited">de 36</span> <span class="hps">g</span> <span class="hps">/ j de</span> <span class="hps">Ca</span> <span class="hps">pour le lait.</span></span><br /><br />1er - 2ème mois de lactation : <br /><br />Jument 200 kg : Ca(g/j) = 0.04*PC + (0.04*PC*1.2/0.5) <br />Jument de plus de 400 kg: Ca(g/j) = 0.04*PC + (0.03*PC*1.2/0.5) <br /><br />3ème mois de lactation au sevrage : <br /><br />Jument 200 kg: Ca (g/j) = 0.04*PC + (0.03*PC*0.8/0.5) <br />Jument de plus de 400 kg: Ca (g/j) = 0.04*PC + (0.02*PC*0.8/0.5) <br /><br /><span id="result_box" lang="fr"><span class="hps alt-edited">Exercice :</span> <span class="hps alt-edited">Le besoin</span> <span class="hps alt-edited">en calcium</span> <span class="hps">pour les chevaux</span> <span class="hps alt-edited">au travail</span> <span class="hps alt-edited">est donné</span> <span class="hps">en proportion</span> <span class="hps alt-edited">de l'exigence en</span> <span class="hps alt-edited">énergie</span></span>: <br /><br />Ca (g/j) = 5.1 * ED (MJ)</p>