The farmer must ensure that the cows come into oestrus no later than 60 days after calving; that the cow conceives at the first or second service or insemination; and that the calf be given the opportunity to grow quickly and wean, without creep, at at least 227kg for males and 204kg for females. This requires adequate milk production by the dam, an inherent ability to grow by the calf, and an adequate source of nutrients above those received through the milk.
The nutritional needs of the cow rise sharply after calving and reach a peak two to three months later. The energy needs are about 60% higher than during late pregnancy, and the protein requirements are more than doubled. The cow should therefore be on a good ration, and this can be a problem before the growth of the spring grass.
The focal point in feeding and management of the cow after calving is to achieve the correct nutritional status at the time of mating. Each cow has a high probability of conceiving within a certain range of body weight and condition. The farmer is therefore faced with the following questions:
What is the ‘target weight/condition’ for any particular class of cow?
この記事は Farmer's Weekly の July 28, 2023 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
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この記事は Farmer's Weekly の July 28, 2023 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です? サインイン
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