Effect Adding Premix Feeds On Production Performance To The Ewe Gestation Period In Its' Supplyment Feeds

The local feed resource is used reasonably by adding premix feeds in its supplyment feed, for satisfy the ewe's kinds of nutrients needs in the gestation period. And the effects of feed additive premix on production performance to different varieties ewe were discussed, The changes of weight and slaughtering index were determined after the premix feeds fed to the weaner lambkin. And the effects of feed additive premix on different varieties sheep were generally studied in Qinghai Province. The followings were the main results:1 The treatments'newborn weight were increased 0.51kg,0.72kg,0.85kg and 0.99kg than the control group respectively to the gestational Qinghai Semi-merino,Small-tail hanyang,Tibetan sheep and Qinghai merino at the condition of grazing,barn feeding and grazing-barn feeding; average weight of one lamb were increased 1.99kg,2.18kg,2.75kg and1.64kg respectively than the control group to two-month-old lambkin, and the survival rate is improved 4.44%,1.56%,5.14%and4.62% than the control group.2 After added the ewe compound premix feeds to supplyment feeds for above four varieties gestation- period ewe, the result showed the content of CP, NDF, ADF in the feces had different degree drops. The CP content in the four trentment groups dropped 2.37%,2.53%,2.12%(P<0.05) and 2.42% (P<0.01) in turn than the control group respectively.The NDF content dropped 5.87%(P<0.05),11.08%,14.67%and9.07%(P<0.01). The ADF content dropped 5.10%, 6.5%, 11.71%(P<0.05) and 7.18% (P<0.01).3 After added the ewe compound premix feeds to supplyment feeds for above four varieties gestation- period ewe, at the base of improving the lamb's survival rate, the live weight output value scope of treatment lambs had different degree improvement, the live weight output value scope other improved 25.18%,21.45%,32.97%and38.01% than the control group.After deducted the charge of the supplyment feeds and the premix feeds, the average income degree of one lamb were different, and increased to 6.3 Yuan,1.35 Yuan,8.10 Yuan and 2.67 Yuan respectively. 4 Effect adding compound premix feeds to lamb daily feed on gain weight and slaughter 4.1 After added premix feeds to the weaner lamb supplyment feeds, there was significant effect on lamb gain weight, supplyment for three months, the treatment group increased 2.0kg, improved 7.69% more than the control group. After supplied for 109d, the treatment group increased 2.0kg,improved 13.33% more than the control group(P<0.05).4.2 The weaner lamb were slaughtered after fed 109d, comparing the treatment group with the control group, carcass weight increased 2.1kg (P<0.05). The slaughtering rate improved 1.87%, eye muscle area increased 1.78cm2(P<0.05). The boiled mutton rate rised 12.42%.4.3 The weaner lamb were slaughtered after fed 109d, comparing the treatment group with the control group, the shearing quantity increased 200.0g, improved 33.33%(P<0.01). The wool length increased 3.22cm improved 48.86%, there was significant difference(P<0.01).