Study on Adaptability of Polled Dorset Sheep and Texel Sheep to Qingdao Area;

Ecological adaptation analysis of Small-tail Han sheep and Dorset Sheep introduced to Huangyuan county in Qinghai Province;

The semen quality,semen freezing-storage-diluent and the preparation technique of frozen semen for the semen in two Dorset sheep at the age of one and two years introduced from new Zealand were scudied.

Determination of Boby Weight of Dorset F_1;

The contemporary ram lamb of first filial generation of Dorset and Han-sheep with small-tail,Dorset and local sheep,Han-sheep with small-tail,local sheep were selected and used to determine the slaughter weight,the dressed weight,the meat weight and the ratio of meat to bone and to compare and analyse under same feeding and managment and fattening.

Experiment of Crossbreeding of Tibetan Sheep with Poll Dorset;

A Study on the effect of Poll Dorset hybridizing Semi-fine wool Sheep;

Fattening Experiment of Poll Dorset×Small-tail Han Sheep

The increasing number of breeding Dorset Down which was reproduced with now available Dorset Down by means of technology of embrgo transfer was fast and low cost in the breeding farm which belongs to the institute of Animal and Veterinary sciences of Hoibei Prefecture.

The body weight of hybrid offsprings of Dorset mutton sheep to local four breeds of sheep at the birth,the age of three-months,sex-months and twelve-months were determined and compared with that in the local valley type of Tibetan sheep.