Reproduction traits of ducks from conservative groups
1984
Ksiazkiewicz, J. | Mazanowski, A. (Centralny Osrodek Badawczo-Rozwojowy Drobiarstwa, Poznan (Poland))
Ducks of native, Dutch, French and English origin were divided into three classes according to the 26-week body weight. Average egg number per layer ranged from 67 (K4) to 184 (KhO) and egg weight from 69.9(Khl) to 89.2 (Al) g. Differences among groups in laying performance, fertile eggs and number of ducklings were also found. Ducks with white plumage of French and English origin, brown Khaki Campbell and their crosses with Orpington showed higher laying performance than native ducks (170 to 184 eggs)
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Central Agricultural Library