How to Improve the Breeding Ability of Small Tail Han Sheep
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Small-tailed sheep are known for their high productivity, often giving birth to multiple lambs and showing rapid growth. Their large body size makes them very popular among farmers. To fully tap into the breeding potential of these sheep, five advanced techniques can be applied in production to improve fertility and overall yield.
First, implementing a frequent lambing system is essential. The "two-year three-lamb" system is one of the most effective methods. Breeding is scheduled in May, January, and September, resulting in lambing in October, June, and February respectively. By shortening the post-lambing period, it's possible to achieve a "five-year five-lamb" cycle, maximizing annual output.
Second, selective breeding plays a crucial role. Rams should have good physical development, strong male characteristics, and high-quality semen. Ewes should come from multiple births and exhibit strong lactation and maternal behavior, along with a well-proportioned body structure.
Third, early weaning of lambs can improve efficiency. Lambs can be weaned at 2.5–3 months for two-year-old ewes, and as early as 1.5–2 months for five-year-old ewes. After weaning, careful management is needed to ensure healthy growth.
Fourth, supplementing the diet with aphrodisiac-like nutrients before mating can enhance reproductive performance. A month prior to breeding, increasing the nutritional value of the ewe’s diet helps improve estrus synchronization, increase ovulation rates, and ultimately boost the number of lambs born.
Lastly, using hormonal treatments to induce estrus and superovulation can significantly increase litter sizes. Techniques such as the "ram effect" or extended lighting can stimulate estrus. Hormonal treatments, like progesterone implants (10–12 mg/day) combined with cotton plugs, can be used for 10–14 days, followed by injections of pregnant mare serum (500–1000 IU) and human chorionic gonadotropin (300–500 IU). Ewes showing normal estrus can receive equine chorionic gonadotropin (300–700 IU) four days before expected estrus, and then another dose of HCG (200–300 IU) after estrus begins.
These methods, when properly implemented, can greatly enhance the productivity and profitability of small-tailed sheep farming.