法国R_(51)番鸭引种观察

Introducing observation on French R_(51) Cairinamoschata

宁乡县种鸡场从福建引进法国R51雏鸭1010羽，实行半开放式栏舍饲养，饲料分为前、中、后期和产蛋期4种，育雏率97．4％，210日龄达产蛋高峰，产蛋率87．3％，平均蛋重73．42g，平均年产蛋133．2枚，孵化率84．6％，150日龄公母平均体重3．42kg，其中公鸭达4．07kg．

1010 French R51, ducklings from Fujian, were feeded in Ningxiang county poultry farm, which were feeded in demiuopen type pen. The feeds were divided into four kinds of ealier stage, rniddle stage, later stage and egg-laying stage. The observation results were that brooding rate, egg-laying rate of peak laying at 210 days old, average laying eggs, hatchery rate and the average body weight at 150 days old, were 97. 4 %, 87. 3 %, 133.2, 84. 6%, and 3. 42 kg, respectively. And the male duck at 150 days old was 4. 07 kg.