饲料中苏丹红染料的测定

建立用Agilent1100高效液相色谱法(HPLC)检测饲料样品中苏丹红含量的方法。采用C18柱(250mm×4.6mmi.d.,5μm),以乙腈和水的混合溶液为流动相,对比采用不同处理方法后,苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ相应的平均回收率。结果表明,在0.1、0.2、0.5、1.0、2.0mg/kg5种添加浓度下,苏丹红Ⅰ、Ⅱ、Ⅲ和Ⅳ相应的回收率均高于90%。说明该方法具有较好的准确性。     

引入陕西的天山马鹿产茸性能分析

对引入陕西的87头天山公马鹿的产茸资料进行统计分析。结果表明天山马鹿年平均产茸量5.56±1.98 kg。各锯龄平均产茸量由0.98±0.72 kg(1锯)到6.53±2.58 kg(10锯)不等。     

佳县红枣产业发展现状及其市场定位分析

针对红枣产业发展现状和出现的问题,分析了佳县红枣产业发展前景及市场定位,提出了开发红枣药用价值,促进产业结构优化,打造佳县红枣品牌,开展品牌营销战略等一系列措施,以促进红枣产业的科学化发展。     

Genetic diversity and historic introgression in German Angler and Red Dual Purpose cattle and possibilities to reverse introgression

Recovering native uniqueness has major importance for breeds with historic introgression. The aim of the study was to estimate population genetic parameters for two local red cattle breeds from Northern Germany and to study possibilities to reverse introgression. Genealogical information consisted of 90,783 individuals for German Angler and 187,255 individuals for Red Dual-Purpose cattle breed, with additional information on sex, born, breed, status, and conventional breeding values. It is concluded that the native genetic contribution could be included as an additional trait in the total merit index in order to recover a part of the native genetic background. Native contributions should be estimated in the long term from marker data in order to account for Mendelian sampling. The maintenance of a sufficient genetic diversity of native alleles can be achieved by an advanced OCS with appropriate constraints.     

松嫩平原优势种羊草与其主要伴生种芦苇空间分布格局分析

芦苇是松嫩草地优势种羊草的主要伴生种,两者常常形成物种组成比较单一的混生群落或者与其他物种组成羊草 杂类草群落.选择羊草 芦苇混生群落,羊草群落和芦苇群落的交错区进行羊草、芦苇单物种格局分析.结果表明,1)混生群落和交错区中,羊草和芦苇均是以集聚分布的形式存在;2)羊草在混生群落中的格局强度小于交错区中的格局强度,芦苇在2种类型群落中的格局强度没有显著差异;3)除了考虑物种的生物学特性以外,混生群落种内、种间竞争也是影响羊草集聚分布和格局强度的主要因素,交错区中,环境异质性和种间竞争是影响集聚分布和格局强度的重要因子;4)芦苇在混生群落和交错区中格局强度没有明显差异,由此可以判定芦苇的空间分布格局形成主要受植物本身生物学特性的影响.     

Effect of bovine colostrum intake on growth,reproductive parameters and survival in red kids

The aim of this study is to evaluate the efficacy of frozen Azawak colostrum supplementation on body weight (BW), average daily gain (ADG), reproductive parameters (mean age at first parturition, fertility, fecundity, prolificacy) and mortality rate among red kids. The study was conducted at the goat farm secondary centre of Maradi in Niger from September 2010 to September 2011. The control animals (n = 20) were left with their mother, while the treatment animals (n = 20) received in addition 50 ml/animal/day of bovine colostrum at birth and 15 ml/animal/day from d2 to d15. Weight was measured weekly from birth to d365. Mortalities were also recorded over the same period. For reproductive parameters, observations began at weaning (d197). Growth rate was higher (p < 0.001) in supplemented animal, and the treatment effects on ADG were observed up to 150 day after the end of supplementation. A similar long‐lasting trend was also observed in relation to the mortality rate (25% for ColG vs. 55% for ConG; p = 0.05). The age at first kidding tended to be lower in the treated group (13.8 ± 0.7 vs. 14.1 ± 0.8 month; p < 0.1). In conclusion, mild bovine colostrum supplementation induces a long‐lasting positive impact on growth rate and to a lower extent on reproduction parameters and survival rate.     

淫羊藿提取物对靶动物红螯螯虾的安全性评价研究

目的明确淫羊藿提取物对红螯螯虾生长性能的影响并对其安全性进行评价。方法将150尾健康红螯螯虾随机分为5组：空白对照组, 淫羊藿提取物临床推荐剂量1倍、3倍、5倍和10倍给药组。4个不同剂量给药组饲料中分别添加0.1%、0.3%、0.5%、1.0%淫羊藿提取物, 每组设3个平行, 每个平行10尾, 分箱饲养。混饲给药7 d, 观察临床症状, 测定红螯螯虾形态学参数、血液生理生化指标以及肝胰腺指数。结果与空白对照组比较, 淫羊藿提取物在临床推荐剂量10倍范围内, 对红螯螯虾增重率、特定生长率、肥满度均无显著（P>0.05）影响;1倍和3倍临床推荐剂量的淫羊藿提取物能极显著（P<0.01）提高红螯螯虾血细胞总数, 极显著（P<0.01）降低血清谷丙转氨酶（ALT）活性, 极显著（P<0.01）提高总蛋白（TP）水平;1 倍临床推荐剂量的淫羊藿提取物能显著（P<0.05）降低大颗粒细胞比例。各剂量给药组红螯螯虾血清TG、BUN、T-CHO水平以及肝胰腺指数与空白对照组比较均无显著（P>0.05）差异, 肝胰腺组织学结构均正常。结论淫羊藿提取物在临床推荐剂量的3倍量范围内连续给药7 d, 对靶动物红螯螯虾是安全的。     

不同熟期荔枝品种的枝梢生长节奏的初步研究

本试验以3-4年生的早熟（‘三月红’）、中熟（‘妃子笑’）、晚熟（‘糯米糍’）及特迟熟（‘马贵荔’）荔枝品种为试材,比较不同成熟期荔枝品种周年的枝梢生长节奏及新叶发育过程中叶绿素指（SPAD）数动态。结果表明：各品种枝梢伸长生长具有一定差异,但都具有一定的节奏性,而枝梢增粗生长周年持续进行,无明显节奏特征;叶绿素指数达到最高值的80%时增加缓慢,因此叶绿素指数达最高值的80%时作为枝梢成熟的标准,用来确定枝梢成熟的时间。     

五味子萃取物有效成分含量测定及其对鸡肉中肌苷酸含量的影响

作者采用高效液相色谱测定五味子萃取物有效成分含量,并研究其对肉仔鸡胸肌、腿肌肌苷酸含量的影响。试验选择1日龄艾维茵肉仔鸡200羽,公母各半,随机分为5组,每组设4个重复,每个重复10羽。各组间鸡体重无统计学上的差异（P>0.05）,试验全期56 d。空白组饲喂基础日粮（不添加任何药物）,试验组分别在基础日粮中添加黄霉素5 mg/kg、五味子萃取物0.1%、0.2%、0.4%。56日龄屠宰试验鸡,取胸肌、腿肌肉,测定肌苷酸含量。研究结果表明,各试验组胸（腿）肌肌苷酸含量均高于空白组与黄霉素组,其中0.4%五味子萃取物组与空白组和黄霉素组相比差异显著（P<0.05）。     

Serological evidence of bovine herpesvirus 2 in northern New Zealand

In the pathological collection of native fauna diseases held at the Taronga Zoo, Sydney, there are materials from about 300 wild, free range brush-tail possums from the Sydney area. Thirty-five of these have neurologic lesions.