The effects of utilization of hazelnut oil,sunflower oil and their products on performance and fatty acid composition of yolk in layer hens

This research has been performed to determine the effects of hazelnut crude oil, sunflower crude oil and its refinery by-products over the laying hens performance and the fatty acid composition of the egg’s yolk. Four hundreds 36-week-old Nick Brown layer hens were allocated into five groups. Treatment groups were supplemented with 1.5% of sunflower crude oil, hazelnut crude oil, acidulated sunflower soapstock, acidulated hazelnut soapstock and acidulated hazelnut crude oil. The daily feed consumption for groups that were fed with crude oils were numerically improved as compared for those nourished with acidulated soapstocks. Although the percentages of cracked and broken eggs in acidulated hazelnut soapstock group was significantly higher than the other groups, daily feed consumption and egg production values were not different. The usage of acidulated hazelnut soapstock reduced the percentage of intact egg ratio. Egg’s specific gravity and yolk color index were the highest level throughout the experiment from start to end in hazelnut crude oil group (p < 0.05). In group that was nourished by hazelnut oil, Omega 3/Omega-6 fatty acid ratios in egg yolk were higher than the groups that were fed with sunflower oil. The oleic acid content of the egg yolk was increased in the groups which were supplemented with hazelnut crude oil and acidulated hazelnut crude oil. Consequently, hazelnut crude oil and acidulated hazelnut crude oil improved the egg shell quality, yolk color index and yolk oleic acid value which would increase egg’s shelf life. On the other hand acidulated hazelnut soapstock supplementation adversely affects the quality of egg shell.     

蚕茧价格、蚕种饲养量与蚕药用量关系的格兰杰因果检验

研究蚕桑产业经济中蚕茧价格(CAP)、蚕种饲养量(简称发种量,SSQ)、蚕药用量(SMQ)3个变量之间的关系,有助于科学预测蚕桑产业经济的发展变化规律。选取1991-2009年江苏省海安县蚕桑生产的年度数据,应用格兰杰因果关系检验(Granger causality test)方法,对上述3个变量进行平稳性检验、变量的一阶差分与单位根检验和格兰杰因果关系检验。结果表明,蚕茧价格与发种量、发种量与蚕药用量之间存在格兰杰因果关系,蚕茧价格与蚕药用量之间不存在格兰杰因果关系,即:蚕茧价格增长能引起发种量的增加,但发种量增加却不是蚕茧价格增长的原因,蚕茧价格对发种量的影响滞后期为2年,到第3年影响程度已逐渐弱化;发种量增加能引起蚕药用量的增加,但影响滞后期只有1年,超过1年后的影响不显著;蚕茧价格与蚕药用量之间从实际趋势看有一定的关联性,但相互之间的影响关系不是直接的,难以建立函数关系。研究结果与蚕桑产业发展变化的实际情况基本相符,认为格兰杰因果关系检验方法可应用于蚕桑产业经济相关因素的发展变化规律研究。     

健全质量管理体系 保证蚕种检验检疫质量

阐述了浙江省蚕种质量检验检疫站质量管理体系的构建与运行实效,对确保全省蚕种质量的作用。     

适合亚热带蚕区饲养的三眠蚕育种材料选择

为了培育适合亚热带蚕区生产高品位生丝的家蚕品种,根据家蚕眠性遗传机制,利用杂交育种及显性三眠纯合技术,将超细纤度三眠蚕品种与夏秋蚕品种杂交育成Z3等细纤度三眠蚕材料,再与多丝量春用蚕品种杂交,初步育成了Z3.C3等纤度为2.44 dtex、全龄经过短、体质强健、茧丝质优良的三眠蚕材料。采用选拔的三眠蚕材料初步组配的Z3×84Y2杂交组合的实验室饲养成绩为:全龄经过21 d,虫蛹率98.55%,全茧量1.75 g,茧层率22.47%,茧丝长1 354 m,解舒率88.15%,洁净95.3分,纤度2.6 dtex。     

雄蚕品种引进试验初报

雄蚕品种的引进与产业化推广是今后蚕业发展的方向。通过引进雄蚕品种夏华×平 8、华秋×平30在实验室对比和农村示范试验 ,试验结果表明 :雄蚕品种综合性状总体较优 ,但某些性状如产量、蚕茧解舒率等有待于进一步改良和完善     

微孢子虫SCM_6(Nosema.sp)对蚕生殖腺侵染的组织学观察

本试验以N.bomycis作对照,对SCM_6感染蚕的生殖腺(?、?)采用临时装片和石蜡切片对生殖腺内容物进行了详细观察.结果表明:SCM_6可侵染蚕的生殖细胞.但侵染生殖细胞的频度较低.     

高效液相色谱荧光检测法同时检测鸡蛋中氟苯尼考及其代谢物氟苯尼考胺残留

建立了高效液相色谱荧光检测法同时检测鸡蛋中氟苯尼考及其代谢物氟苯尼考胺残留的方法.鸡蛋经碱性乙酸乙酯提取,饱和正己烷脱脂,氮吹仪吹干浓缩后用流动相溶解.用Lichrospher C1s柱,以乙腈-磷酸二氢钠溶液(0.01 mol/L,含0.005 mol/L十二烷基硫酸钠和0.1％三乙胺)(35:65,v/v)为流动相,在激发波长224 nm、发射波长285 nm处用荧光检测器检测.氟苯尼考在0.01～10.0 mg/L、氟苯尼考胺在0.002 5～2.5 mg/L浓度范围内,本方法线性关系良好,相关系数分别为0.99 97和0.999 8.当添加水平氟苯尼考为15～500μg/kg、氟苯尼考胺为5～500 μg/kg时,该方法平均回收率分别为87.41％～92.29％和89.01％～95.15％,相对标准偏差分别为3.51％～5.36％和4.28％～5.72％;检测限分别为1.5 μg/kg和0.5 μg/kg(S/N=3);定量限分别为5μg/kg和2 μg/kg(S/N=10).该方法简便、快速、灵敏度高,可同时检测鸡蛋中氟苯尼考和氟苯尼考胺的残留.     

家蚕平附种母蛾微粒子病集团抽样检验方法改进研究

以超几何分布和二项分布为基本数学模型,综合现行家蚕母蛾微粒子病集团检验方法的优点,结合广西蚕种生产实际,以集团为单位,设计形成适合平附种的计数二次抽样检验方法。分别从理论和实际两个方面对新方案进行了比较分析。结果表明新方案解决了现行方法有毒集团与有毒蛾数不对等的问题,改进了农业行业标准散卯种方法过于严格,生产方风险过大的问题,改进了农业行业标准平附种方法过于宽松,使用方风险失控的问题,同时检验结果准确,检验工作量少,具有较高的准确性和较好的经济性。     

Effects of High-tannin Sorghum and Bentonite on the Performance of Laying Hens

The effects of feeding high-tannin sorghum (HTS) (5% catechin equivalents (CE)) on the performance of laying hens were examined in two experiments. In experiment 1, the effects of including varying levels of HTS in layer diets were investigated. Sixty-three Isabrown hens were randomly assigned to each of the seven diets over a period of 56 days. In experiment 2, the effects of bentonite on the utilization of HTS (3.74% CE) by laying hens were investigated. Forty-five Isabrown hens were randomly assigned to each of five diets over a period of 42 days. In both experiments, weekly measurements were made for feed intake (FI), percent hen-house production (% HHP), egg weight and egg specific gravity (ESG). The results of experiment 1 showed that the different sorghum inclusion levels had no effect (p>0.05) on HHP, egg weight and ESG, while those of experiment 2 showed that maize and LTS diets gave similar weight gain, FI and FE (p>0.05). However, HHP was higher (p<0.05) for the LTS diet than for the other diets. The addition of bentonite of 0.25% or 0.5% to the HTS diet did not improve (p>0.05) layer performance. When all the results were considered together, it was concluded that HTS can be used in layer diets without adverse effects on performance. The use of bentonite to deactivate sorghum tannins is not considered necessary.     

气相色谱-质谱联用法对蚕蛹油中脂肪酸成分分析

采用索氏提取法提取蚕蛹油,用气相色谱-质谱(GC-MS)联用法分析蛹油的脂肪酸成分.经NIST质谱数据库检索和文献对照共检出8种成分.用面积归-法测出八种成分的含量,其结果表明蚕蛹油中脂肪酸的组成有豆蔻酸(0.20%)、花生四烯酸(0.27%)、软脂酸(16.84%)、棕榈油酸(2.40%)、硬脂酸(2.35%)、亚麻...