白羽瘤头鸭繁殖性能的观察

在相同的饲养管理条件下,对197只白羽瘤头鸭(分4批)进行繁殖性能的观察。结果表明:白羽瘤头鸭开产日龄平均为164天,年产蛋量110个。经生物统计分析,开产日龄与开产头3个月的产蛋量呈负相关(r=-0.22),而开产头3个月产蛋量与年产蛋量呈极显著正相关(r=0.827)。在产蛋周期中连产蛋数变化范围大(6～41个),其中以连产10～20个蛋为常见(占65.70%)。第一个连产蛋数与年产蛋量呈正相关。因此,第一个连产蛋数和头3个月产蛋量可做为早期选留高产种鸭的依据。7～9月龄的公鸭配种能力最强,当公母鸭配比为1:6～10时,受率精为94.6～75.9%,其中以公母配比1:6最佳,平均受精率可达93.5%,公鸭的性机能与年龄关系密切,随着年龄的增大,配种能力逐渐下降。在本品种繁殖或杂交利用时,控制适宜的配种年龄和雄雌比例,可获得较高的受精率。

AN OBSERVATION ON REPRODUCTION PERFORMANCES OF WHITE MUSCOVY DUCKS

An observation was made on the reproduction performances of 197 white muscovy ducks which were hatched from four batches of eggs at separ- ate times but fed and managed under the same condition.The results of the observation indicate that the average egg-production-commencing age of white muscovy ducks is 164 days,the average annual egg yield is 110.Accord- ing to the biostatistical analysis,the egg-production-commencing age is of negative correlation with the egg yield of the first three months(r=-0.22), while the latter is of strong positive correlation with the annual egg yield (r=0.827~(***)).The amount of sequent-egg-production in the egg production cycle varies widely(6—41 eggs),but the most common range is between 10 and 20 eggs(65.70%).The amount range is of the first sequent-egg- production is of positive correlation with the annual egg yield Therefore,the amount of the first-sequent-production in the egg production cycle and the egg yield of the first three months can be used as a basis for the early selection of breeding ducks. The male duck at 7—9 months of age seemed to have the greatest breeding capacity.As the male/female ratio was 1:6—10,the fertility rate ranged 94.6—75.9%.The best male/female ratio was 1:6,at which the fertiliy rate could reach 93.5%.Thus the sexual activity is closely related to the age:as the age of the male ducks increased,the breeding capacity decreased.In practising reproduction program by means of same breed breading or hybridization,a higher fertility rate could be obtained so long as the breeding age and male/female ratio are properly controlled.