根据国家和省发展肉牛规模化养殖方案要求,针对我省肉牛基础母牛养殖效益、规模化发展等情况,省肉牛产业技术体系第一调研组由首席专家谢春雷带队,王英明、毛文智、张奎、夏广军和陈承祯等人于2016年7月利用一个多月时间,重点对东部山区桦甸市和龙井市;中部农区德惠市、梅河口市和东丰县;西部牧区前郭县和双辽市共7个县市的基础母牛规模生产发展情况进行调研.调研期间在当地畜牧业管理局和畜牧总站的支持下,走访了21个肉牛养殖场户,主要采取咨询、座谈和现场考察等形式.现将调研情况汇报如下.

1 目前吉林省肉用羊饲养的主要地方品种 上溯到2006年,我省原有的吉林细毛羊己逐渐消失,吉林大部分地区养殖户及养殖场所饲养的基础母羊几乎是由小尾寒羊与吉林细毛羊杂交的后代,随着2007年以来羊市场价格不断飙升,无论规模、品种、饲养管理条件如何,但凡涉足养羊行业的饲养户均有利润产出.因此,造成养殖户盲目追从,不断扩大种群,中小型饲养场分布各地,规模不断发展,使基础母羊存栏数量日益膨胀,自2014年至今出现严重市场波动,仓储压力过大,导致羊市场价格大幅度下滑,养殖户均出现了亏损现象.

Low dosage gonadotropic hormone was applied to induce of double calving on this paper and the factor of success was analyzed. The result showed that through treating on PMSG and HCG, PMSG and PG, FSH and PG, the pregnant rate was 80%-95%,84%-91.8% and 85%-100%,respectly.In contrast to natural estrus group which pregnant rate was 90% ,there is no significant difference. However ,on the aspect of double calving rate, double calving rate was 0.92%(0.85%-1.0%) under the condition of natural estrus,11.3%(11.0% -11.8%) treating on PMSG and HCG, 13.0%(11.0%-15.8%) treating on PMSG and PG, 19.6%(11.0%-27.0%) treating on FSH and PG, which showed that it was effective to apply the hormone to induce double calving ,furthermore different treating method had a different effect.Birth weight and weight of one month ,three months and six months were measured between double calving treating on FSH and PG, natural single calve under the similar condition .The result showed that there existed significant difference in birth weight, one month weight ,three months weight and six months weight on average between double calving and single calve, but no difference in the weight of six months between them. It is important to enhance the calf raising management during the lactation phase.

1.概述 牛海绵状脑病(Bovine Spongiform Encenphalopathy,BSE),俗称疯牛病(Mad Cow Disease),是牛的一种进行性、非炎性、高致死性的变性性神经系统疾病.其主要临床特征为精神状态异常、姿势和运动异常、感觉异常;病理组织学变化以脑干灰质特定神经元核周体或神经纤维网出现海绵状空泡变性为特征.该病被OIE规定为B炎传染病,我国将其规定为A类传染病.

畜牧业的发展水平是一个国家或地区农业发展程度的重要标志.吉林省是我国重要的畜牧业发展基地和畜产品主产区,畜牧业是农村经济的主导产业,也是我省的优势产业.