内蒙古白绒山羊附睾精子冷冻效果的研究

本试验把不同温度下的样品分成3个处理组,通过检测精子与繁殖力有关的重要指标研究3个处理组的冷冻效果,结果显示, 在3个不同的环境下收集附睾,室温下(19 ℃)收集附睾精子(处理1组)的冷冻效果最好,解冻后活率为(55.0±3.4)%;4 ℃下收集的精子(处理2组)冷冻解冻后的活率为(35.0±2.5)%;37 ℃下收集的精子(处理3组)的冷冻效果较差,解冻后活率为(23.0±2.5)%。通过对处理组中冷冻和解冻后两个阶段的精子指标的测定,研究了精子活率与其他指标的关系,得出白绒山羊附睾精子能够成功的保存。     

家蚕种质资源研究进展及展望

介绍了家蚕种质资源的概况,综述了家蚕种质资源在经济性状、抗逆和抗病性、生理生化特性和遗传分析等方面的研究进展情况,并展望了其发展前景。     

狗牙根种质资源及遗传多样性的研究概况

介绍了国内外狗牙根种质资源的研究概况;从形态学水平、染色体水平、蛋白质水平、DNA水平对狗牙根的遗传多样性进行概述,并对存在的问题提出建议。     

Competing seed consumers drive the evolution of scatter-hoarding: Why rodents do not put all their seeds in one larder

Competition for food resources amongst animal seed dispersers and pilferers has driven dispersers to increasingly innovative seed-caching methods.We determined cache sizes in the field as well as seed cache recovery ability of a scatter-hoarding mouse, Acomys subspinosus, and compared these results to its seed competitor, the seed predator Rhabdomys pumilio.We found that up to 76% of A. subspinosus caches in the field contained one seed and that A. subspinosus was able to find caches of all sizes equally well under wet and dry soil conditions. In contrast, R. pumilio was able to find caches of all sizes in wet soil conditions but recovery success of small caches (single-seed) was poor in dry soil conditions. This suggests that scatter-hoarding may have evolved in A. subspinosus as an anti-pilfering strategy. This strategy would likely work best in dry conditions, where cache pilferers have difficulty locating small caches.     

云南牧草种质资源研究现状及前景

云南省复杂的自然地理和气候条件决定了云南省牧草种质资源的丰富性。为此,介绍了云南省自然条件概况并对云南省牧草种质资源种类的丰富度、分布及研究现状进行了总结,列出了云南草地主要牧草资源植物以及11类草地的草群组成。针对云南省种质资源存在的问题,从保护和利用的目标出发,提出了广泛收集牧草种质资源,对收集到的牧草种质资源进行有效保护和深入研究,积极创新和永续利用的建议和对策,并对牧草种质资源研究的预期目标和前景进行了展望。     

Privatization of Veterinary Services in Developing Countries: A Review

Increasing fiscal constraints on the government, a lackadaisical performance by public sector animal health and breeding services and pressure from donor partners have prompted the governments of various developing countries to rethink the role of the public sector in the provision of veterinary services. Various countries have started to implement, or have already implemented, privatization of some veterinary services. The results are mixed. It is established that private provision alone is not optimal, and a blend of private and public sector veterinary services is required to utilize the virtues of both.The privatization process has also begun in India. Certain state governments in India are pursuing a cost recovery approach and are encouraging private practitioners to cope with the financial constraints and to deliver broad and effective animal health and breeding services. This paper considers the global aspects of the privatization of veterinary services as well as the scenario in India, so as to gain an insight into the very complex and debatable issue of privatization of veterinary services.     

坪用野牛草种质资源搜集及品种选育研究进展

野牛草是一种抗逆性强、管理粗放的草坪植物,非常适合我国一些缺水城市水土保持和园林绿化的需要,但也存在绿期较短、颜色较浅、雄株坪用景观不好等缺点.近年来,通过对野牛草种质资源进行鉴定和评价,从中选择了大量优良的种质材料,使其坪用缺点逐步改善,并利用有性杂交和生物技术等育种手段培育出了许多优良坪用品种.     

饲料中苏丹红染料的测定

建立用Agilent1100高效液相色谱法(HPLC)检测饲料样品中苏丹红含量的方法。采用C18柱(250mm×4.6mmi.d.,5μm),以乙腈和水的混合溶液为流动相,对比采用不同处理方法后,苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ相应的平均回收率。结果表明,在0.1、0.2、0.5、1.0、2.0mg/kg5种添加浓度下,苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ相应的回收率均高于90%。说明该方法具有较好的准确性。     

高等学校举办干部教育的师资问题与对策

高等学校举办干部教育培训，主要依靠普通高等教育的教师，特色鲜明，优势明显，但也存在一些问题。教师是教育质量的保障，提高高等学校干部教育工作的质量，就必须抓好教师队伍的建设，以增强干部教育的生命力。