花生副产物在畜牧生产中的综合利用     

郭爱红  ;张号杰 《饲料与畜牧》2014,(11):13-15

花生在生产过程中产生大量副产物,其营养价值较高,是重要的饲料加工原料。文章主要针对花生生产过程中副产物营养价值及在畜牧生产中的利用进行综述。  相似文献   

心房钠尿肽基因敲除小鼠的鉴定     

杨扬  李斌  叶杰  亓翠玲  何晓东  李江超  章倩倩  黄韧  张钰  王丽京 《动物医学进展》2015,(1):71-74

研究心房钠尿肽基因敲除小鼠(ANP-/-小鼠)的生物学及病理学特性。ANP-/-小鼠与C57BL/6小鼠饲养于SPF级环境中,观察小鼠的繁育状况及其生物学特性,选取合适时间处死小鼠,通过HE染色观察脏器形态及组织结构。ANP-/-小鼠的繁殖周期比C57BL/6长,产仔率较低;ANP-/-小鼠肝脏、肺脏、脾脏较C57BL/6小鼠的有明显炎症反应,但是C57BL/6小鼠未见明显的病理改变。提示ANP基因的缺失可能与炎症发生有关。说明ANP-/-小鼠繁殖较慢、产仔率低,且正常繁殖的普通小鼠不会引起器官的病理学改变。但作为一种在心血管、代谢疾病上的动物模型,并与炎症甚至肿瘤有可能的未知联系的转基因动物,其很有研究和探索价值。  相似文献   

中国饲料粮消费问题探析     

冉娟  孙振 《中国农学通报》2017,33(17):153-158

为了准确分析中国当前饲料粮供需情况及影响因素,首先通过供给法计算出1984—2013年的狭义饲料粮可供给数据,其次通过需求法计算中国饲料粮消费数据。推算得出饲料粮供需数据虽有差距但都呈增长趋势。中国粮食政策加剧了饲料粮供需失衡状况。因此提出相应政策建议:一是适当增加肉类产品进口并严厉打击走私;二是粮食政策在确保主粮(大米和小麦)基本自给基础上,适度进口饲料粮(主要是玉米),并在海关政策制订上将精饲料原料通盘考虑,制订考虑替代品如大麦、高粱、DDGS等在内的一揽子关税与配额政策。  相似文献   

How to Assess Stress in Reptiles     

《Journal of Exotic Pet Medicine》2014,23(3):240-243

Stress, as an adaptive response of any animal to a stimulus that presents a threat to homeostasis, can occur in reptiles. Yet, many veterinarians fail to recognize the signs of stress in reptiles. In this article, evaluation of reptile stress has been discussed with a focus on the analysis of behavioral changes, neuroendocrine correlation, and biochemical and physiologic effects in reptiles. If stress can be assessed and treated properly in captive reptiles, their health and well-being can be optimized.  相似文献   

动物生理学实验教学单独设课之重要性     

陈晓光  吕琼霞  刘玉梅  邓雯 《畜牧与饲料科学》2014,(2):29-31

在高校的动物生理学教学中,实验教学是其中的一个重要组成部分。作为课堂教学的重要辅助和补充,动物生理实验教学效果对课堂教学具有极大的驱动作用。为突出动物生理实验教学的重要性,对动物生理学实验施行单独设课,这是考查理论教学效果、促进实验课教学质量的一种重要措施。  相似文献   

Simultaneous detection of multiple mycotoxins in broiler feeds using a liquid chromatography tandem-mass spectrometry     

Jutamart KONGKAPAN  Saranya POAPOLATHEP  Supaporn ISARIYODOM  Susumu KUMAGAI  Amnart POAPOLATHEP 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2016,78(2):259-264

Mycotoxins are secondary fungal metabolites that are typically present in grain and feed ingredients used for animal feeds. An analytical method using LC-ESI-MS/MS was developed to quantify nine mycotoxins, consisting of aflatoxin B₁ (AFB₁), AFB₂, AFG₁, AFG₂, T-2 toxin, deoxynivalenol (DON), nivalenol (NIV), zearalenone (ZEA) and ochratoxin A (OTA) in broiler feeds. In total, 100 samples of broiler feeds were collected from poultry farms in Central Thailand. The survey found that AFB₁ and ZEA were the most prevalent mycotoxins in the feed samples at percentages of 93% and 63%, respectively. The limit of detections (LODs) of investigated mycotoxins was 0.20–0.78 ng/g. AFB₂, DON, AFG₁, NIV and T-2 toxin were also detectable at low contamination levels with percentages of 20%, 9%, 7%, 5% and 1%, respectively, whereas OTA and AFG₂ were not detected in any of the feed samples. These results suggest that there is a very low level of risk of the exposure to mycotoxins in feeds obtained from broiler farms in Central Thailand.  相似文献   

桑叶养猪实用技术     

肖和良 《猪业科学》2020,37(2):76-79

桑叶养猪实用技术分为桑树种植技术和桑叶干粉发酵养猪技术两个部分。利用荒地种植桑树,降低生猪养殖饲养成本,桑叶养猪种养结合,成为生态农业典范。桑叶干粉发酵技术,提高了桑叶干粉的可消化率和饲料功能。桑叶干粉发酵料占配方6%~10%,做成桑叶猪饲料,替代3%~5%鱼粉、豆粕等蛋白质饲料,节约了饲料成本。桑叶喂养猪(简称桑叶猪,下同)的猪肉中含有肌苷酸等风味物质,显著提高猪肉胴体品质和猪肉风味。设计猪尿处理,采用红泥膜沼气池降解工程工艺应用后,降解水兑2倍清水对桑树喷灌工艺,减少人工处理劳力和成本费用。设计10%抗非洲猪瘟中药饲料添加剂+桑叶饲料,预期防治非洲猪瘟总效果85%以上。桑叶养猪实用技术可行,供同行参考。  相似文献   

“虚拟仿真”背景下畜牧兽医研究生实践教学改革探索研究     

余燕  聂国兴  徐之勇  王莉  王秋霞  胡东方  马金友 《现代农业科技》2020,(7)

研究生教育位于国民教育体系的顶端，是国家高等教育发展水平的重要标志。为培养 既具有责任担当精神，又具有宽厚的专业知识和创新能力，还具有较高的英语水平和较强的计算机网络应用能力的高层次畜牧兽医人才，本研究对我校畜牧兽医专业研究生的培养现状进行了分析总结，提出了基于“虚拟仿真”背景下人才培养的新模式，总结了虚拟仿真研究生科研平台建设的优势和使用效果，为其它专业研究生的培养提出参考。  相似文献   

基于PCA-SVR-ARMA的狮头鹅养殖禽舍气温组合预测模型   总被引：3，自引：2，他引：1  

刘双印  黄建德  徐龙琴  赵学华  李祥铜  曹亮  温宝琴  黄运茂 《农业工程学报》2020,36(11):225-233

为提高狮头鹅养殖禽舍气温预测精度,提出了基于主成分分析(Principal Component Analysis,PCA)、支持向量回归机(Support Vector Regression,SVR)融合自回归滑动平均(Autoregressive Moving Average,ARMA)模型的狮头鹅养殖禽舍气温组合预测模型。在建模过程中,运用主成分分析法筛选狮头鹅养殖禽舍气温的关键影响因子,消除变量之间冗余信息,约简预测模型结构;采用SVR-ARMA构建狮头鹅禽养殖舍气温组合预测模型,先通过SVR对气温进行预测,再由基于ARMA模型的残差预测值修正气温预测结果。利用该模型对广东省汕尾市2018年7月21日至2018年7月30日期间的狮头鹅养殖禽舍气温进行预测。结果表明,该组合预测模型取得了良好的预测性能,与标准BP神经网络、标准SVR、PCA-BPNN(反向传播神经网络,BackPropagationNeuralNetwork)、PCA-SVR和PCA-BPNN-ARMA等模型对比分析,其评价指标平均绝对误差、均方根误差和平均绝对百分比误差分别为0.183 2℃、0.454 0℃和0.005 9,均表明所提出的组合模型具有更高的预测效果,不仅能够满足狮头鹅养殖禽舍气温实际精准调控的需要,还为狮头鹅健康养殖和种苗繁育环境精细化管理提供决策。  相似文献   

Phosphorus availability and farm structural factors: examining scarcity and oversupply in north‐east Germany          下载免费PDF全文

T. F. H. Theobald  K. Daedlow  J. Kern 《Soil Use and Management》2015,31(3):350-357

Assessing factors influencing phosphorus (P) availability in soils is important in preventing its overexploitation and excessive application in agricultural systems. Despite high historical P applications in the federal state of Brandenburg (Germany), county data on soil test P (STP) reveal considerable disparities in soil available P. In addition, negative soil balances as a result of small mineral P and manure inputs have been observed, raising questions about the factors leading to this situation. Our work focused on identifying possible causes operating at the farm management level by conducting a letter survey in two administrative districts of Brandenburg, the counties Barnim and Uckermark, linking farm management factors (ownership type, farm size, land tenure, animal husbandry with or without grassland and its intensity, presence of a biogas plant and organic production) to farmers’ self‐indicated levels of STP. Small‐ to medium‐sized individual farms tended to have (very) high STP, while large partnership farms and companies/cooperatives were sensitive to factors resulting in low STP. Farms with low shares of land ownership, the presence of grassland, extensive cattle farming and stockless organic farming had lower STP. On the other hand, biogas plants, partly in combination with intensive livestock (cattle) farming, were associated with larger STP. It was concluded that more care should be devoted to the design of agricultural policies and that further (inter‐ and transdisciplinary) research on this topic is needed.  相似文献