The Study On The Growth And Production Quality Of Hebei Domestic Chicks Under The Free Range Rearing Conditions

In this experiment we studied for the growth and production quality of Hebei Domestic chicks under the free range rearing conditions. This experiment included four departments, the first: we designed three different gross lands, group I (cotton and clover land ), II (orchard and clover land), III (orchard and weed land ) .We choosed the first-day chicks and reared consolidate, three groups reared with uniform assorted feeds within 0-5 weeks. Disperse from sixth week, and group I reared with corn and adjusts following the growth. Group II limited the amounts of feeds which makes the chicks into half-famine. GroupIIIreared enough corns in feeding prophase till eighth week, reared restrainedly from eighth week and stopped feeding at thirteenth week till the end of the experiment. The results indicated, the best growth performance was group I of Hebei Domestic chicks(cocks and hens), group II was the worst. The growth curves kept accord before 5 weeks age, from sixth week, the growth trend kept basically raising of trial I (cocks and hens) in the period of 6~8weeks and declined about 13week, but the growth trend kept slowly raising of trial II. The growth trend kept raising in the period of 6~8weeks and declined after 8 week, further more the growth and development declined badly after 14 week. The second department is: contrast with the Cage (Jingbai) chicks, we choose 8 respectively from Hebei Domestic cocks and the Cage cocks at 130 days and weigh up behind 12 hours of breaking feeds. We release blood from mouth and butcher, we determine the index of the butcher. Further more we choose 20 eggs respectively from Hebei Domestic-eggs and the Jingbai Cage-eggs about 300 days and analyze nutrient component. The results indicate: The ability of producing meat on the Cage chicks is better than Domestic chicks, its weigh, slaughter weigh, the weigh of chest muscle, the weigh of leg muscle and the weigh of wing is enhances 24.97% (P<0.01) , 17.59% (P<0.01) , 20.29% (P<0.01) , 30.63 % (P<0.01) and 25.51 % (P<0.01) than Domestic chicks. The slaughter qualityes of Hebei domestic chicks were better than the cage (Jingbai) chicks. Carcass yield rate, breast muscle percentage and wing percentage were respective higher than that of the cage chicks about 6.31%(P<0.01), 5.32% (P>0.05)and 1.10%(P>0.05), further more the percentage of abdominal fat of Hebei domestic chicks was lower than that of the cage chicks about 37.20% (P<0.05 ) . The immune apparatus and digestive system were farther development of Hebei domestic chicks than that of the cage chicks, and Hebei domestic chicks had obvious character which the body was thinner and the head was smaller. Seeing from the nutrient components of chicken, the dry matter rate of breast muscle of Hebei domestic chicks was remarkable higher than that of the cage (Jingbai) chicks (P<0.05 ) and compared to hindquater muscle of Hebei domestic chicks and breast muscle of the cage (Jingbai) chicks, the difference was not significant (P>0.05) . The protein content of breast muscle of Hebei domestic chicks was highest and the lowest was hindquater muscle of the cage(Jingbai) chicks. The fat content of breast muscle of Hebei domestic chicks was greatly...