严格执行储备办 法规范蚕种储备制度

蚕种是特殊的农作物种子，又是茧丝绸业的基础。蚕种具有超前生产、用途专一、社会影响等特点。养蚕是蚕农栽桑获取回报的最主要途径，因而蚕种储备制度的建立，有利确保蚕种供应。建立蚕种储备制度，既是促进蚕业稳步发展的需要，也是法律法规规定的政府义务。经过2007年的努力，省、市、县（市、区）三级储备一代杂交种达80000盒，原种5000张。本文重点介绍了蚕种储备规范操作的要求。     

Practical starter pig amino acid requirements in relation to immunity,gut health and growth performance

Immune system activation begins a host of physiological responses. Infectious agents are recognized by monocytes and macrophages which in turn stimulate cytokine production. It is the hormone-like factors called cytokines that orchestrate the immune response. The classic responses observed with immune system activation and cytokine production include： anorexia, fever, lethargy, recruitment of other immune cells, and phagocytosis. While production of immune system components is known to require some amino acids, increases in amino acid requirements are more than offset by the associated decrease in protein accretion and increased muscle protein degradation that also accompanies immune system activation. However, the biggest impact of cytokine production is a decrease in feed intake. Therefore, as feed intake decreases, the energy needed to drive protein synthesis is also decreased. This suggests that diets should still be formulated on a similar calorie：lysine ratio as those formulated for non-immune challenged pigs. The evidence is sparse or equivocal for increasing nutrient requirements during an immune challenge. Nutritionists and swine producers should resist the pressure to alter the diet, limit feed, or add expensive feed additives during an immune challenge. While immune stimulation does not necessitate changes in diet formulation, when pigs are challenged with non-pathogenic diarrhea there are potential advantages on gut health with the increased use of crystalline amino acids rather than intact protein sources （i.e., soybean meal）. This is because reducing crude protein decreases the quantity of fermentable protein entering the large intestine, which lowers post weaning diarrhea. It also lowers the requirement for expensive specialty protein sources or other protein sources such as soybean meal that present immunological challenges to the gut. The objective of this review is two-fold. The first is to discuss immunity by nutrition interactions, or lack thereof, and secondly, to review amino acid re     

Practical starter pig amino acid requirements in relation to immunity,gut health and growth performance

Immune system activation begins a host of physiological responses. Infectious agents are recognized by monocytes and macrophages which in turn stimulate cytokine production. It is the hormone-like factors called cytokines that orchestrate the immune response. The classic responses observed with immune system activation and cytokine production include: anorexia, fever, lethargy, recruitment of other immune cells, and phagocytosis. While production of immune system components is known to require some amino acids, increases in amino acid requirements are more than offset by the associated decrease in protein accretion and increased muscle protein degradation that also accompanies immune system activation. However, the biggest impact of cytokine production is a decrease in feed intake. Therefore, as feed intake decreases, the energy needed to drive protein synthesis is also decreased. This suggests that diets should still be formulated on a similar calorie:lysine ratio as those formulated for non-immune challenged pigs. The evidence is sparse or equivocal for increasing nutrient requirements during an immune challenge. Nutritionists and swine producers should resist the pressure to alter the diet, limit feed, or add expensive feed additives during an immune challenge. While immune stimulation does not necessitate changes in diet formulation, when pigs are challenged with non-pathogenic diarrhea there are potential advantages on gut health with the increased use of crystalline amino acids rather than intact protein sources (i.e., soybean meal). This is because reducing crude protein decreases the quantity of fermentable protein entering the large intestine, which lowers post weaning diarrhea. It also lowers the requirement for expensive specialty protein sources or other protein sources such as soybean meal that present immunological challenges to the gut. The objective of this review is two-fold. The first is to discuss immunity by nutrition interactions, or lack thereof, and secondly, to review amino acid requirement estimates for nursery pigs.     

肉用山羊营养需要量的研究进展

本文综述了肉用山羊的饲料采食量，蛋白质、能量、矿物质及维生素等营养需要量的研究进展及现状。     

国家农林机械安全标准解读

新修订的国家标准（GB10395.1-2009）于2010年7月1日起正式实施。由于该国家标准与替代的原国家标准（GB10395.1-2001）相比有变化较大,且该标准也是植保机械3C认证产品应符合的国家强制性标准之一,因此,新国家标准的组织实施,对我国农机生产企业及植保机械生产企业有着重要影响。着重介绍了新标准的要点和安全要求,以期帮助企业正确理解和贯彻执行。     

基于用户需求的高校图书馆信息服务营销策略研究

本研究从高校图书馆信息服务营销理论出发,采用SWOT分析方法,对高校图书馆信息服务营销进行优势,劣势,机会和威胁分析,提出高校信息服务的应对策略,注重用户需求,树立营销理念,创新营销模式和加强营销评估。     

利用析因法测定产蛋鸡必需氨基酸需要量、模式及模型

本研究是3期饲养试验内容的概括和总结，目的是使所建立的估测产蛋鸡必需氨基酸（EAA）需要模型具有广泛的适应性和准确性。对394只罗曼蛋鸡的试验数据进行多元回归分析。根据食入的每个EAA（主要包括赖氨酸、蛋氨酸、色氨酸、苏氨酸、亮氨酸、异亮氨酸、苯丙氨酸、缬氨酸、组氨酸、精氨酸、胱氨酸、酪氨酸）与产蛋、维持和增量所需的相应EAA的回归关系，测定相应的回归系数，建立了估测每个EAA需要的数学模型，可估测产蛋鸡在任何生产条件下每个EAA的需要量及模式。另外．本试验还建立了指数曲线模型（R2为0．71），唐它来描述食入EAA与产蛋量间的关系比较恰当，不过，用来估测产蛋鸡EAA需要量时，其估测值与实测值的吻合度没有桥因法好（R2为0．80）。     

某高校课表编排管理系统的需求分析

课表的编排涉及教师、学生、课程、教室等资源,把教师、学生和学校全体工作人员联系起来,确定每天、每周、每学期的各项活动安排,是学院综合教务管理系统的一个重要组成部分。文章讨论的排课管理系统以目前学院教学管理体制为基础,兼顾一般性应用需求的同时重点考虑高校工作特点对排课系统的要求。     

德令哈市边界地区草地保护管理情况

本文通过对德令哈市与周边省界草地边界现状、存在的问题等调研;分析当前边界线上草地保护现状、存在的问题;提出了解决的工作建议。     

黑龙江省绥化市北林区农业合作社和个体农户大豆生产技术需求的比较

为了更好地推广先进实用的栽培技术,对兴聚农业合作社社员和周边个体农户实地调查,比较两种生产方式下大豆生产技术需求的差异和投入产出情况。农业合作社技术需求次序为：农业机械和设施>新品种>栽培与施肥技术>病虫害防控技术>经济分析咨询、信息服务与政策扶持;个体农户技术需求的次序为：新品种>栽培与施肥技术>病虫害防控技术>农业机械和设施>经济分析咨询、信息服务与政策扶持。农业合作社和个体农户在同类技术的需求内容及最终效益方面亦有差异。研究结果有助于依据不同生产规模种植户的技术需求,开展有针对性的技术服务,提高中国大豆综合生产能力。