HS-73实用新型振动筛式花生收获机

针对现有花生收获机的技术缺点和山东省莱西市花生种植土壤的特性,研制了一种振动筛式花生收获机,阐述了机具的设计依据、方案选择和主要技术创新点,介绍了机具的结构和作业方式,通过实验,获得了机具的主要作业指标。     

罐类消防车防冻系统研究

简述了目前罐类消防车防冻系统存在的问题,提出了新型防冻系统方案.根据燃油加热器的工作原理,利用发动机工作中产生的热量,为罐类消防车内的散热装置(泵房、驾驶室、罐体等)提供热量.这一设计符合现行的节约理念,破解了冬季罐类消防车在低温下灭火战斗的冻结问题,提升了罐类消防车在寒冷气候下的作战效能.     

Carbon sequestration potential of recommended management practices for paddy soils of China, 1980-2050

China's rice paddies, accounting for 19% of the world's total, play an important role in soil carbon (C) sequestration. In order to reduce uncertainties from upscaling spatial processes of the DeNitrification-DeComposition (DNDC) model for improving the understanding of C sequestration under recommended management practices (RMPs), we parameterized the DNDC model with a 1:1,000,000 polygonal soil database to estimate how RMPs influence potential C sequestration of the top 30 cm of Chinese paddy soils and to identify which management practices have the greatest potential to increase soil organic carbon (SOC) in these soils. These practices include reduced/no tillage, increasing crop residue return, and increasing manure applications. A baseline and eleven RMP scenarios were projected from 2009 to 2080, including traditional and conservation tillage, increasing crop residue return, increasing manure incorporation, and the combination of these practices. The results indicated that C sequestration potential under modeled RMPs increased compared to the baseline scenario, and varied greatly from 29.2 to 847.7 Tg C towards the end of the study period with an average rate of 0.7 to 20.2 Tg C yr^− 1. In general, increasing crop residue return was associated with higher rates of C sequestration when compared to increasing manure application or practicing conservation tillage. The simulations demonstrated that the most effective soil C sequestration strategy probably involves the implementation of a combination of RMPs, and that they vary by location.     

播种方式与追肥时期对黑龙江省冬小麦根系生长及产量的影响

为了探寻黑龙江省冬小麦适宜的播种方式和追肥时期,在田间条件下,研究了播种方式和追肥时期对冬小麦根系生长及产量的影响.结果表明,不同追肥处理下小麦的根冠比随生育期呈下降趋势;根系体积、根系表面积生长随生育期呈先升高后下降的变化趋势,乳熟期达到峰值;不同处理间产量呈现显著性差异,拔节期一次施肥垄沟播处理与平播处理分别比各自对照(不追肥处理)提高27.8％、39.7％,返青期施肥分别提高21.4％、21.1％,返青期与拔节期分施分别提高27.7％、26.7％.垄沟播种在拔节期一次追施氮肥产量可达到最高,比平播处理产量提高14％.黑龙江省冬小麦采取垄沟播种在拔节期适量追肥的栽培技术有助于根系生长及提高产量.     

浅析集约化鸡场鸡肾脏病变的病因及防治

禽痛风是由于家禽体内蛋白质代谢障碍产生大量的尿酸或肾脏受损伤导致尿酸及尿酸盐排泄障碍,大量尿酸及尿酸盐在肝脏、胃肠、肠系膜、心脏、输尿     

高温对生猪生产的影响及防控措施

平阳地处浙南沿海,每年6至9月是典型的高温季节。高温引起的热应激,给养猪生产带来严重的负面影响。1高温影响1.1高温对公猪配种能力的影响高温可影响公猪的性欲和精液品质,减少射精量和精子数量。据测试,种公猪的单次射精量一般为150～500     

化隆县基层畜牧兽医队伍建设调查报告

畜牧兽医队伍肩负着畜牧技术推广和动物防检疫工作,对拓宽农民致富渠道、改善人民生活、维护农民切身利益等方面都起着积极的作用。在重大动物疫病防控工作中更是发挥了积极的职能作用。所以推进基层畜牧兽医人才队伍建设力度,优化基层人才队伍结构、提高基层人才队伍素质,对畜牧产业的健康发展尤为重要。     

对一起养殖公司使用含违禁饲料处罚案的分析与探讨

一段时期内,国内有些不法的蛋白质饲料生产企业擅自将"三聚氰胺"添加到鱼粉或饼粕类蛋白饲料中,企图以其无效的高氮(假蛋白)来达到常规检验所呈现高含量蛋白的检测结果,谋求以假乱真,获取非法利益,无疑危害了畜牧业生产。     

黄淮山羊骨形态发生蛋白4结构与功能分析

基于克隆得到的黄淮山羊骨形态发生蛋白(BMP4)全长cDNA序列,推导氨基酸序列,运用生物信息学方法从蛋白质理化性质、信号肽、结构域、Motif、二级和三级结构预测等方面对BMP4结构和功能进行分析。结果表明,BMP4具有信号肽、TGFβ超家族7个保守半胱氨酸结构特征和潜在的糖基化等位点,无跨膜区,成熟肽与模板2h62A有91.176%的氨基酸序列一致。因此,山羊BMP4具有BMPs家族的典型结构特征,这些结构特征构成了该蛋白在山羊软骨和骨组织形成、原始卵泡发育及早期胚胎发育中发挥作用的基础。