Study On Effect Of Nursing Lamb Supplement Feed Experimentation In Different Nutrition

Random choose 48 lamb born April 30 May 12 , 2003 , average 10d, including twenty-four health and no sickness crossbred lambs of Suffolk (♂) ×Han Yang (♀) and twenty-four health and no sickness crossbred lambs of Dorset(♂) ×Han Yang(♀), each divide into three groups at random according to birthday weight , meat sheep's hybridizationing . (every barn to 16 lambs, 8 crossbred lambs of Suffolk (♂) ×Han Yang (♀) and 8 crossbred lambs of Dorset (♂) ×HanYang (♀) ).By statistical analysis, their average birth weight are 4.98±1.23kg, 4. 79±1.20kg, 4. 53±1. 04kg, through examining remarkable (P>0. 05). What this test is adopted is that two factors have repeated test design , two factors are fodder nutrition level and variety, every one is a repetition. The test purpose is to study growth of nursing lambs under different nutrition level and growth of two hybridization lambs under the same nutrition level offering it suitable raising and manage. The result of the test shows :1 .Fodder I₁ II₁,I₂ II₂, I₃ II₃ used in testing originally, The protein level is reduced gradually, the gradient is 1%. Though it is not high to change the gradient, the result of the test has obvious differences . In different nutrition level, the sheep of three test groups increase weight (12.99±2.66kg, 12.12±2.64kg, 11.16±2.26kg), the difference is not remarkable (P> 0. 05). Through 60d experimental period, the range of general increase weight is different, the first group increase percentage is 135.5%, the second group increase percentage is 125.7%, the third group increase percentage is 128%. So the fodder I₁ II₁ is best. By economic benefits analyse, first group fodder I₁ II₁ is superior to another two group fodder . The economic benefits of three group are 1412.35Y, 1288.88Y, 1247.82Y respectively, the first group's economic benefits is 9.58% higher than the second group's, 13.19% higher than the third group's, the second group's is 3.29% higher than the third group's. The nutrition level in this test is relatively low, but still can make economic benefits , this has offered the theoretical foundation for the fact that raise the area with worse condition to mend and raise in nursing period of lambs.2.Originally in the test ,crossbred lambs of Suffolk (♂) ×Small Tail Han Sheep (♀) and crossbred lambs of Dorset (♂) ×Small Tail Han Sheep (♀) are not special difference in increasing weightl2.292±3.005kg, 12.296±2.726kg) , the difference is not remarkable (P> 0. 05). So Suffolk and Dorset can all make the male parent of economic hybridization,3.Through an analysis of relations between weight and body, relations between mathematics model and meat sheep assortment body is neared , make the chest measurement index of choosing the 75d Iambs.