主要根據(jù)肉兔本身的質(zhì)量性狀或數(shù)量性狀在一個(gè)兔群內(nèi)個(gè)體表型值差異，選擇個(gè)體，淘汰低劣個(gè)體。常用的有剔除法、更優(yōu)法和總分法等3種。

According to the quality of their rabbit traits or quantitative trait differences in a rabbit group within the individual phenotype, choose the best individual, the elimination of poor individuals. There are 3 kinds of commonly used methods: tick division, optimum method and total score method.

(1)剔除法即對(duì)選擇的每個(gè)性狀都限定一個(gè)更低標(biāo)準(zhǔn)，只要有1個(gè)性狀低于該標(biāo)準(zhǔn)即予以淘汰。

(1) the elimination method defines a minimum criterion for each trait selected, which is eliminated as long as 1 traits are below the standard.

(2)更優(yōu)法對(duì)兔群中的任何個(gè)體，只要有1個(gè)性狀的表型值優(yōu)于其他個(gè)體，則該個(gè)體即予留種。

(2) the optimal method for any individual rabbits, as long as the phenotypic value of 1 traits than other individuals, the individual shall be reserved.

(3)總分法對(duì)每個(gè)性狀根據(jù)優(yōu)劣進(jìn)行評(píng)分，將幾個(gè)性狀累汁，總分更高的個(gè)體即予留種。例如，某養(yǎng)兔場(chǎng)對(duì)一兔群進(jìn)行選擇，希望選出產(chǎn)仔率(L)高、早熟(M)、肉質(zhì)(Q)、毛皮品質(zhì)(P)好的個(gè)體留作種用。每個(gè)性狀根據(jù)優(yōu)劣分成10級(jí)，分別計(jì)分為]一10分。

(3) the total score of each trait according to quality score, several traits tired juice, with the highest scores for individual selection. For example, a warren of a group of rabbits were chosen to select the high birth rate (L), early (M), (Q), excellent meat quality fur (P) good for individual use. Each character is divided into 10 grades according to their merits, which are divided into 1 and 10 points respectively.

肉兔的秋季繁殖：秋季氣候溫和，飼料廣泛，營(yíng)養(yǎng)豐富，公、母兔體質(zhì)開(kāi)始恢復(fù)，性欲逐漸旺盛，母兔受胎率高，產(chǎn)仔數(shù)多，是肉免配種繁殖的又一個(gè)好時(shí)期。據(jù)生產(chǎn)實(shí)踐觀察，9—11月份公兔性欲漸趨旺盛，精子活力增加，密度增大；母兔發(fā)情率為75％一80％，配種受胎率為60％一65％，平均每窩產(chǎn)仔數(shù)6—7只。

Rabbit: Autumn Autumn breeding feed widely, mild climate, rich nutrition and physical fitness of male and female rabbit began to recover, libido gradually strong, female rabbit pregnancy rate is high, theaveragepregnancytimeis62, is also a good meat free breeding breeding period. According to the production practice of observation, 9 - November male rabbit libido gradually vigorous, sperm density increases; female rabbits increased, the rate of estrus was 75% to 80%, the breeding pregnancy rate is 60% 65%, the average litter size of 6 - 7.

但秋季為肉兔換毛季節(jié)，營(yíng)養(yǎng)消耗大，對(duì)配種繁殖的影響較大，必須加強(qiáng)管理，調(diào)整日糧。同時(shí)，公兔因夏季休閑后可能出現(xiàn)暫時(shí)性不育，配種必須進(jìn)行復(fù)配；人工授精時(shí)，采集的精液更好棄去不用。

But autumn is the rabbit molting season, nutrient consumption, a great influence on the breeding, we must strengthen the management, adjusting the diet. At the same time, male rabbits may suffer from temporary infertility after summer leisure, and the first mating must be mixed. The semen collected for the first time should be discarded in artificial insemination.

肉兔的夏季繁殖：季氣候炎熱，尤其是南方各省，高溫多濕，肉兔食欲下降，體質(zhì)瘦弱，性機(jī)能不強(qiáng)，配種受胎率低，產(chǎn)仔數(shù)少。北方比南方好些。據(jù)生產(chǎn)實(shí)踐觀察，夏季公兔性欲不強(qiáng)，精子活力下降，密度降低，畸形精子數(shù)增加；母兔發(fā)情率為20％一40％，受胎率為30％一40％，平均每窩產(chǎn)仔數(shù)3—5只。即使產(chǎn)仔，因哺乳母兔天熱減食，泌乳量減少，仔兔瘦弱多病，成活率很低。但如母兔體質(zhì)健壯，又有遮蔭防暑條件，溫度低于32℃的地區(qū)，仍可適當(dāng)安排配種繁殖

Rabbit breeding in summer season: hot weather, especially in the southern provinces, high temperature and humidity, rabbits decreased appetite, poor health, sexual function is not strong, low conception rate and litter size less. The north is better than the south. According to the production practice of observation, the summer male rabbit undersexed, sperm motility, abnormal sperm density decreased, the increase in the number of female rabbits; estrus rate was 20% 40%, pregnancy rate is 30% 40%, the average litter size of 3 - 5. Even if pregnant, lactating rabbits for hot days eat less, reduce the amount of lactation, pups weak, survival rate is very low. But if the female rabbit healthy body, and summer shade conditions, temperature lower than 32 DEG C, can be appropriate arrangements for cross breeding