哺乳仔猪附红细胞体病的诊治

哺乳仔猪的附红细胞体病多发生于新疫区,主要临床症状为高热,皮肤发红,眼结膜发白或黄染,后肢及腹部的毛孔常见血红素渗出而呈现铁锈色,有的乳头肿胀.病猪消瘦、贫血、腹泻、皮下水肿并有胶样浸润,脏器表面多黄染,并有少量出血点,胃肠道常发生卡他性炎症.血液涂片经姬姆萨染色后,镜检可见红细胞变形,其表面有淡紫色的病原体寄生.用血链米先治疗乳猪附红细胞体病有较好的疗效.     

Boundaries and scales in shrublands of the Doñana Biological Reserve,southwest Spain

To verify that the stabilized sand dunes of Doñana, southwest Spain, are hierarchically nested, vegetation was sampled along topographic gradients at three spatial scales and Split Moving Window Boundary Analysis was applied to identify vegetation boundaries and ecotones. At small scale, only one window width was used, while for boundaries detection at upper scales the information from five windows was pooled. Environmental factors controlling plant composition were studied along topographic gradients, and diversity was estimated within the boundaries. According to several theoretical frameworks, I discuss the types of boundaries produced at different scales. Lower level boundaries are characterized by transitory gradients linked to local exchanges; intermediate boundaries are symmetric and very stable over the time; the large scale boundary is asymmetric with strong inherent abiotic constraints reinforced by strong biotic feedbacks. In spite of a similar plant composition, a plant community, the mixed shrub, works as an ecocline or an ecotone depending on the spatial scale considered. A certain parallelism exists between shrub composition along dune slopes and dune generations; however, processes at upper scale constraint plant composition at lower scale resulting in different mature formations.     

保育仔猪网床培育新技术

保育仔猪网床培育新技术是工厂化养猪生产实践研发总结出的一项先进的仔猪培育新工艺、新技术,这项技术的实施有效地提高保育仔猪阶段成活率和63日龄仔猪个体重.从保育舍设计建筑、仔猪断奶、保育栏进猪前的准备、仔猪转栏操作、做好定时观察及时处理异常仔猪、搞好刚转栏仔猪保温控制、按照仔猪免疫程序按时搞好猪只免疫、以及搞好日常饲养管理等8个方面对保育仔猪网床培育新技术进行阐述.     

一种新型无级变速器的原理与分析

与传统带式无级变速器(CVT)相比,剖分变径式无级变速器改变了传动带工作直径变化的方式,减小了作用在传动带侧面的挤压力,从而减小了由此产生的传动带过大磨损等问题;给出了新型CVT机构参数设计公式,并对其传动能力及包角变化进行了分析,为剖分变径式无级变速器的开发奠定基础。     

图像去噪LOT模型的分裂Bregman方法

基于分裂Bregman方法具有较快的收敛速度以及在迭代过程中保持正则化参数为一个常数的优点, 提出用分裂Bregman方法来解图像去噪LOT模型的第2步. 实验表明, 与原始的梯度下降法相比较, 该算法具有较快的收敛速度, 又能较好地复原图像.     

Experiment Research of Recycle the CondensateWater of Split Air-conditioner

In allusion to waste and irregularity emissions of the condensate water of split air-conditioner,with the actual energy saving potential to recycle the condensate water use for precool the inlet air of condenser, the author by means of make a device to recycle and precool the condensate water, then apply this device to split air-conditioner of a laboratory, and experiments are conducted. The computation and analysis results showed that before and after equipped with the precooled device, COP of the conditioner increasing 12.94% and 9.52% respectively under the conditions which applying sufficient cold water or produced condensate water by itself. Meanwhile, a certain gap of quantity between the produced condensate water and the cool water demanded was discovered, the former only account to 56.26% of the latter. In the end, combine the experiment condition and results to give some corresponding suggestions so as to the application and popularization of the precooled device.     

祁连山高寒牧区优质奶羔生产效果分析

以引进品种羊‘白萨福克’、‘邦德’、‘特克塞尔’和澳洲‘美利奴’为父本,‘甘肃高山细毛羊’为母本,开展杂交组合筛选试验,形成4种杂交组合(分别简称白萨甘细、邦甘细、特甘细和澳甘细),’甘肃高山细毛羊‘为对照组(简称甘高细).在2008～2011年,通过连续4年系统观测853只杂种羔羊和174只甘高细的生长结果、屠宰性能、肉品质和内脏器官指标.结果表明:特甘细的断奶体质量为28.27kg,比邦甘细、白萨甘细、澳甘细和甘高细分别高出2.46、3.29、5.76、4.66kg;特甘细的眼肌面积及GR值均显著高于其他杂交组合(P<0.05),分别比甘高细提高16.49cm2和2.07mm;特甘细、白萨甘细和邦甘细的热胴体质量分别比甘高细提高37.44%、11.70%和21.87%;特甘细的全胃质量和小肠长度均显著高于其他3个组合(P<0.05).表明在祁连山高寒牧区放牧条件下,特克塞尔×甘肃高山细毛羊是生产奶羔的最优杂交组合,特克塞尔是生产奶羔的最优父本.     

口服复合菌制剂对哺乳仔猪免疫功能的影响

为了避免个体差异,在 ６ 窝仔猪中每窝选择 ４ 只,共 ２４ 只仔猪随机分成对照组（１２ 只）和试验组（１２只）．仔猪出生第二天开始灌服复合菌制剂（试验组）和生理盐水（对照组）,以后每 ２ ｄ 灌服 １ 次,直至断奶（２８日龄）,第 ３０ 日龄采血检测．研究结果表明,复合菌制剂能极显著提高哺乳仔猪淋巴细胞转化率（４６．５０％ ）、吞噬细胞吞墨率（３２．７５％ ）、 Ｔ 淋巴细胞总数（ Ｃ Ｄ３,６１．６７％ ）、血清 Ｉｇ Ａ（２．０９５ ｇ· Ｌ－ １）和 Ｉｇ Ｇ（７．３２３ ｇ· Ｌ－ １）水平（ Ｐ＜ ０．０１）,但对 Ｉｇ Ｍ （１．４１６ ｇ· Ｌ－ １）、 Ｃ３（０．２２５８ ｇ· Ｌ－ １）和 Ｃ４（０．１５８３ ｇ· Ｌ－ １）没有显著影响（ Ｐ＞ ０．０５）．试验结果说明了复合菌制剂能显著增强哺乳仔猪细胞免疫和体液免疫功能     

一种新型低压绝缘分裂导线电气参数的理论计算与分析

应用电磁场理论以及电力系统架空线电气参数的计算方法,对四芯正方形排列和四芯三角形排列的低压绝缘分裂导线在不同截面和不同供电方式下的电抗、电纳进行了较详尽的理论计算。与相应的常规架空线相比较具有电抗小、电纳大、截流量增大等显著优点。其推导出的理论结果与实验检测报告的结果是吻合的。该计算方法为新型低压绝缘分裂导线的生产和应用奠定了理论基础。同时,为低压电网改造提供了一种新的供电模式。     

妊娠后期和泌乳期饲粮添加姜粉对母猪和哺乳仔猪抗氧化性能的影响

本试验旨在研究妊娠后期和泌乳期饲粮添加姜粉对母猪和哺乳仔猪抗氧化性能的影响。试验采用2×2析因试验设计,分2个饲养阶段(妊娠后期和泌乳期)进行,每个饲养阶段设2个姜粉添加水平(0、1.0%)。结果表明,在妊娠后期饲粮中添加姜粉,显著提高了母猪血清中超氧化物歧化酶(SOD)活性、总抗氧化能力(T-AOC)和谷胱甘肽(GSH)含量,降低了母猪血清中丙二醛(MDA)含量(P0.05);在泌乳期饲粮中添加姜粉,显著提高了母猪血清和乳中SOD活性、T-AOC和GSH含量(P0.05);而在妊娠后期和泌乳期饲粮中分别单独添加姜粉时,均显著提高了仔猪血清GSH含量(P0.05)。2个时期均添加姜粉对母猪血清、母乳和仔猪血清抗氧化效果最佳。由此可见,在妊娠后期和泌乳期饲粮中添加1.0%姜粉均能够提高母猪和哺乳仔猪的抗氧化性能,且2个阶段不存在交互作用,在妊娠后期和泌乳期同时添加时效果最好。