據(jù)報(bào)道，懷孕母兔胎兒萎縮死亡率與母兔營(yíng)養(yǎng)水平有關(guān)，交配后第9天觀察受精卵著床數(shù)，超過正常營(yíng)養(yǎng)水平的高營(yíng)養(yǎng)水平的胚胎死亡率為44%，正常營(yíng)養(yǎng)水平的只有18%。

It is reported that the death rate of pregnant rabbit is related to the nutritional level of the female rabbit. The number of fertilized eggs implanted on the ninth day after mating is 44%, the mortality rate of the embryo is higher than that of the normal nutrition level, and the death rate is 44%, while the normal nutrition level is only 18%.

供給種兔全價(jià)、平衡的營(yíng)養(yǎng)物質(zhì)，維持良好的種用體況是提高繁殖力的重要措施。目前多數(shù)養(yǎng)兔生產(chǎn)者配制飼糧中的能量，粗纖維基本可滿足家兔的需要，但微量元素等或缺乏或使用不合理，造成母兔不發(fā)情、不排卵、受胎率低，即使受胎，胎兒死亡率、畸形率、流產(chǎn)率也高，公兔性欲降低、配種能力差。

Nutrient supply, rabbit full price balance, maintain good for body condition is an important measure to improve productivity. At present most rabbit producers in the formulated diet energy, crude fiber can meet the basic needs of the rabbit, but the lack of trace elements or or unreasonable use, cause females not estrus, ovulation, pregnancy rate is low, even if the pregnancy, fetal death, malformation rate, abortion rate is high, decreased libido and mating in male rabbits poor.

為此，對(duì)于繁殖種群，除了滿足能量、粗蛋白、粗纖維等營(yíng)養(yǎng)外，還建議添加鋅、錳、鐵等微量元素和維生素A、維生素D、維生素E等。

Therefore, for breeding population, besides energy, crude protein, crude fiber and other nutrients, we must add zinc, manganese, iron and other trace elements and vitamin A, vitamin D, vitamin E and so on.

冬春季節(jié)青飼料不足，種兔要添喂胡蘿卜或大麥芽，以利配種受胎。據(jù)筆者試驗(yàn)，對(duì)于集中配種的公兔每天添喂生雞蛋25克，可明顯提高配種受胎率。

Lack of green fodder in winter and spring, rabbit to feeding carrots or malt, and insemination. According to the test, the concentration of breeding male rabbits daily feeding raw egg 25 grams, can significantly improve the conception rate.

前者活胎兒數(shù)平均為3.8只，后者為6只。因此，懷孕期間不宜過度追求高營(yíng)養(yǎng)水平，這樣可減少胚胎死亡率，提高母兔產(chǎn)仔數(shù)。NRC(美國(guó)國(guó)家科學(xué)研究委員會(huì))推薦的懷孕母兔營(yíng)養(yǎng)水平：消化能10.46兆焦，粗纖維10%～12%，粗蛋白15%，鈣0.45%，磷0.37%。

The average number of living fetuses in the former was 3.8, and the latter was 6. Therefore, during pregnancy, it is not suitable for excessive pursuit of high nutrition level, which can reduce the mortality of embryos and increase the number of mother rabbits. NRC (National Science Research Commission) recommended nutrition level of pregnant rabbits: digestive energy 10 trillion and 460 billion Jiao, crude fiber 10% to 12%, crude protein 15%, calcium 0.45%, phosphorus 0.37%.

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