Dual-purpose Duck breed-Sichuan Ma Duck

The main results are as follows: (1) the producing area and distribution are small dual-purpose varieties. The central producing areas are located in Mianyang, Wenjiang, Leshan, Yibin, Neijiang, Dachuan and other areas in Sichuan Province, and are widely distributed in rice field producing areas in Sichuan Province. Sichuan sesame duck is precocious and has strong grazing ability. it is the main breed of meat ducks in Sichuan province.

(2) the appearance features, the physique is small, the physique is solid and compact, the feathers are tight, and the neck is long and the head shows. Beak orange yellow, beak beans are mostly black, chest developed, prominent. Shins, webbed orange-red. The feather color of the female duck is more miscellaneous, and most of them are hemp brown. The feathers of the body and buttocks of the sesame-brown female duck are light brown at the bottom, with oval black spots, which gradually increase from the head to the back of the body, and the color deepens. There is more than a white collar at the lower 2max of the neck. The abdomen has white feathers. The darker ones in the sesame-brown female ducks are called "marijuana ducks", the feathers are muddy yellow, those with smaller spots are called "jute ducks", and other miscellaneous feathers account for about 5%. The male duck is narrow and long, with 2 feathers and 4 sexual feathers, curved to the back. Male ducks are of the same feather color and are often divided into two types. A "green-headed male duck", which has emerald green feathers on the head and neck, white feathers on the abdomen, and reddish-brown feathers on the forechest; another "sand-headed male", the feathers of the head and neck of the male duck are black and white, without emerald green luster, the shoulders and back are light yellow Reed markings, the forechest is reddish brown, the belly feathers are white, and the sexual feathers are gray.

(3) production performance ① Egg laying performance under grazing condition, the average annual egg production is about 150,131eggs at 500 days old, the average egg weight is 72g to 75g, the eggshell is mostly white, a few are blue. The egg shape index is 1.4. ② growth rate and meat production performance birth weight 40g, 30-day-old body weight 443g, 60-day-old body weight 1214 g, 90-day-old weight 1568 g. After two weeks of fattening at the age of 100 days, the weight gain was 540g, the weight gain rate was 39.58%, the lean meat rate was 25.21%, the sebum rate was 22.32%, the 100-day-old eviscerated rate was 63.1%, the duck breast and leg muscles accounted for 29.10% of the carcass, and the female duck was 31.84%. Carcass water content is 60.70%, crude fat is 22.43%, crude protein is 16.04%, ash content is 0.85%. Using Jianchang duck as male parent and Sichuan Ma duck as female parent, the hybrid generation has obvious heterosis in live weight and average daily gain. The hatching season of ③ reproductive performance is from March to August, the mating ratio of male and female ducks is 1:10, the fertilization rate is about 90%, and the average hatching rate is about 85%. The utilization life of female ducks is 2 ~ 3 years, and that of male ducks is 1 year.