新疆伊犁地区黄土矿物特征与沉积环境

伊犁黄土重矿物组成及石英颗粒表面结构特征分析表明,伊犁黄土不仅为风成沉积,而且黄土沉积环境较黄土高原更为干旱。黄土中复杂的重矿物组成和丰富的片状矿物的存在证明形成黄土的粉尘可能主要来自远离沉积区的中亚荒漠区。     

抗白叶枯病菌水稻体细胞无性变异系离体筛选后代的生理生化特性

 对离体筛选的抗白叶枯病的粳稻105R、粳稻3037R后代植株功能叶的生理生化特性进行测定,结果表明:与未筛选的粳稻105S、粳稻3037S相比,筛选后代植株中可溶性蛋白质含量低,而酚类物质和木质素含量、过氧化物酶(PO)、多酚氧化酶(PPO)和苯丙氨酸解氨酶(PAL)活性均明显高于未经筛选的对照(感病)品种。由此说明离体筛选抗病品系的抗病机制与一般抗性品种类似。     

文心兰新品种‘海文吉祥1号’

文心兰新品种‘海文吉祥1号’是由文心兰‘柠檬绿’（HoneyAngle）组培苗芽变株选育而来。花梗直立坚挺,花瓣和萼瓣淡黄色,唇瓣柱头处呈黄色,向四周边缘逐渐变浅成乳白色。为切花型品种,观赏价值高,应用前景广。     

检测动物产品中水貂阿留申病毒和犬细小病毒复合PCR方法的建立和应用

水貂阿留申病（AD）和犬细小病毒病（CP）是危害经济动物健康的重要疫病,可造成巨大的经济损失。本研究建立了水貂阿留申病毒（ADV）、犬细小病毒（CPV）复合PCR检测方法,并对临床样品进行了大量检测,结果表明本方法特异、敏感、简便、快速,非常适宜临床样品的大量筛选检测,对经济动物疫情的快速诊断与控制、加强经济动物及其产品进出境的检验检疫工作,御疫情于国门之外有重要的意义。     

Effects of Selenium Yeast on Growth Performance and Some Blood Biochemical Indexes in Laying Ducks of Rearing Period in Cages under High Ambient Temperature

The study was conducted to determine the effects of different levels of selenium yeast(SeY, added as selenium content) on growth performance and some biochemical indexes in Jinding laying ducks under high temperature (29-35℃). 144 Jinding laying ducks of rearing period (10-16 weeks old) were divided into 4 groups, control group, experimental groups Ⅰ,Ⅱ and Ⅲ, supplemented with 0, 0.15, 0.45 and 0.75 mg/kg Se, respectively. The results showed that compared with the control group, the addition of SeY to the diets could significantly increase the average daily feed intakes (ADFI) of ducks at 14-16 weeks old (P<0.05); The body weights of ducks in group Ⅰ at 13-15 weeks old were significant higher than that in the control group (P<0.05),and the body weight at 16 weeks old was higher than the other three groups significantly (P<0.05),there was no significant difference between the body weight and standard body weight at 16 weeks old in group Ⅰ(P>0.05), but the body weights of other three groups were extremely significantly lower than the standard weight (P<0.01); There was no significant difference among the four groups for feed to gain ratios (F/G), while the group Ⅰ was the lowest; AST activities of group Ⅰ were significantly lower than group Ⅱ(P<0.05), LDH activities of groups Ⅰ,Ⅱ and Ⅲ were lower than the control group significantly (P<0.05), and LDH activities of groupⅠ were lower than groups Ⅱ and Ⅲ significantly (P<0.05). TCH concentrations of groups Ⅰ and Ⅱ were higher than group Ⅲ significantly (P<0.05). It is concluded that the addition of 0.15 mg/kg of Se (added as SeY) could obviously improve the growth performance of the laying ducks in reared cages, protect the function of liver, promote the TCH concentrations of duck serum.     

新疆2家牛场引进安格斯牛的牛病毒性腹泻、牛传染性鼻气管炎和布鲁氏菌病检测

为了解新疆当地牛病毒性腹泻(BVD)、牛传染性鼻气管炎(IBR)和布鲁氏菌病对引进安格斯牛的影响,对2家牛场新引进的和引进2年以上的安格斯牛进行BVD、IBR和布鲁氏菌病病原学和血清学检测。结果显示,新引进的安格斯牛未检测出BVD抗原、IBR病原核酸、布鲁氏菌感染抗体,而引进2年以上的安格斯牛虽未检出BVD抗原,但IBR病原感染抗体阳性率为100%,且PCR核酸阳性率为20%,布鲁氏菌感染抗体阳性率为5%。结果表明,新引进的安格斯牛虽未感染这3种疫病病原,但引进后有较大的感染风险。结果提示,牛场需加强BVD、IBR和布鲁氏菌病防控,实施全群免疫,筛选并淘汰感染牛,坚持自繁自养,慎重从场外引进牛只。     

紫花苜蓿花粉活力和柱头可授性的研究

紫花苜蓿Medicago sativa是世界农牧业发展中极为重要的一种豆科牧草。以昆明地区引进3个苜蓿品种和德钦野生苜蓿为研究材料,对其不同部位的花粉活力、花粉数量和柱头可授性进行了研究。结果表明：不同品种和同品种不同部位的花粉活力差异较大,但基本表现为Acrora高于其他苜蓿品种,同品种苜蓿基本表现为中部和下部显著高于上部（P＜0.05）;花粉数量变化差异也较大,基本表现为CW1351苜蓿高于其他苜蓿品种;柱头可授性变化差异也较大,基本表现为德钦苜蓿显著高于其他苜蓿品种（P＜0.05）。     

云贵川三省部分地区警犬狂犬病血清中和抗体调查

为评价警犬的狂犬病免疫效果,了解影响免疫效果的因素,2017年在云南、贵州、四川三省部分地区免疫狂犬病疫苗的警犬中随机抽样,采用荧光抗体病毒中和试验(FAVN),检测血清中狂犬病病毒中和抗体效价。结果显示,共抽检187只警犬,中和抗体阳性127只(≥0.50 IU/m L),总体免疫合格率为67.91%,其中云南、贵州、四川3省的免疫合格率分别为57.14%、68.33%、76.06%。结果分析表明,警犬狂犬病免疫合格率与犬的年龄、免疫次数、疫苗类型等因素有关,而与性别和品种无关。建议完善警犬免疫程序,加大血清中和抗体监测力度,对不合格警犬及时加强免疫;对每个影响因素进行连续性分析,以确定影响警犬狂犬病免疫合格率的具体因素。     

Pathogen Analysis of Goat's Respiratory Diseases

To investigate the pathogens of goat's respiratory disease from a goat farm in Guangxi province, the epidemiological investigation, clinic observation, pathological examination, bacterium isolation and identification, biochemical test, PCR and animal experiment test were conducted.The preventive and control measures were taken on the basis of pathogen epidemiological characteristics and drug sensitive test results.The results showed that Mycoplasma, influenza virus and parasite were negative by isolation and culture or PCR, however, two strains of gram-negative bacteria named MS1 and MS2 were isolated from lung.MS1 was identified as Serratia marcescens by biochemical test and 16S rRNA sequencing, which shared 99% nucleotide homology with other Serratia marcescens in GenBank.And MS2 was identified as E.coil by the same methods that shared 99% nucleotide homology with other E.coli in GenBank.Animal experiment showed that two strains could cause death in mice.The drug sensitive tests showed two strains were highly sensitive to spectinomycin, amikacin, kanamicin and neomycin.Kanamycin and dexamethasone were used to treat the sick goats, and achieved good results.     

Environmental Risk Assessment of Emerging Contaminants Using Degradation Data

The degradation behavior of an emerging contaminant is a key factor in its environmental risk assessment. Existing risk assessment methods based on EC degradation data commonly neglect the time-varying volatility of the degradation, the possible correlations in degradation between different ECs, and the estimation errors. To fill the gaps, this paper proposes an EC risk assessment framework based on the Wiener process. We first focus on degradation data from competitive experiments, which are adopted to evaluate a useful risk indicator, i.e., the bimolecular rate constant of a degradation reaction. A two-dimensional Wiener process model is developed to capture the degradation behaviors of the target EC and a reference contaminant in the experiment. Point and interval estimations of desired quantities, including the rate constant and the degradation half-life, are developed. We further extend the model to the multivariate case, which is applicable to waste water treatment where multiple ECs degrade in a mixed solution. A risk indicator for the mixed solution is proposed, based on which a minimal treatment time can be determined. Both point and interval estimation procedures of the risk indicator and the minimal treatment time are proposed. Two EC degradation datasets are used to demonstrate the proposed methodologies.   Supplementary materials accompanying this paper appear on-line.