Effect of the Immunity Efficacy of IBD Immune Complex Vaccine on ND La Sota Vaccine     

ZHANG Zhen-hua  LI Lin  ZHANG Jian-wei  SHEN Jia  SHI Ai-hua  HUANG Feng-jun  ZHENG Xiao-lan  JIANG Bei-yu 《中国畜牧兽医》2016,43(5):1374-1378

1-day-old SPF chickens and commercial Jingfen chickens were vaccinated with IBD immune complex(IC) vaccine, NDV La Sota vaccine were inoculated simultaneously every one week and every two weeks.NDV La Sota immunization alone was as the control group.At the 2nd, 3rd, 4th and 5th week post inoculation, blood samples were taken and the ND HI antibody were tested.Experimental chickens were challenged with high virulent NDV at the 5th week post inoculation, the protective rate of each group was calculated.The results showed the ND HI antibody were not significant different in the combined immunization of IBD IC vaccine priming and NDV La Sota vaccine boost and NDV La Sota vaccine alone immunization (P>0.05).The results indicated that IBD IC vaccine has no immunosuppression on NDV La Sota vaccine in SPF chickens and commercial Jingfen chickens.  相似文献   

稀土元素对玉米幼苗生长及部分矿质元素吸收的影响   总被引：4，自引：0，他引：4  

祁葆滋  高万久 《作物学报》1990,16(4):305-310

玉米早49×多黄8的种子分别以0、2、5、10、40和100ppm 含80%La 和 Ce 的混合稀土溶液浸泡24小时。幼苗生长于 Hoagland 培养液,辅以人工光照和溶液通气。移栽两周后收获。测定株高、根长、植株叶面积、地上与地下部鲜重和干重以及植株各部分 La、Ce、Ca、Zn、Cu、Mn、Mo 的含量。结果表明,植株中稀土元素含量随处理的稀土浓  相似文献   

三亚市桉树枝瘿姬小蜂监测模型研究     

罗丰  许彦  杨礼哲  肖春雷  唐超  孔祥义 《热带作物学报》2010,30(11):37-39

通过对海南省三亚市桉树枝瘿姬小蜂数量调查,并结合6个关键气候因子,运用SAS9.0进行回归分析,得到了桉树枝瘿姬小蜂监测模型：y＝0.549 3＋0.000 6x1＋0.269 3x3＋0.415 6x4－0.612 2x5－0.023 1x6。该模型表明桉树枝瘿姬小蜂数量与月降雨总量、月平均最高温度、月平均最低气温、月平均温度和月平均相对湿度有极显著相关性,而与月日照时数无显著相关性。其中月降雨总量是影响桉树枝瘿姬小蜂数量的主要气候因子,其次为月平均温度、月最低平均温度与月最高平均温度。  相似文献   

From small-scale habitat loopholes to decadal cycles: a habitat-based hypothesis explaining fluctuation in pelagic fish populations off Peru   总被引：22，自引：0，他引：22  

Arnaud Bertrand  Marceliano Segura  Mariano Gutiérrez  & Luis Vásquez 《Fish and Fisheries》2004,5(4):296-316

The Peru‐Humboldt Current system (HCS) supports the world's largest pelagic fisheries. Among the world's eastern boundary current systems, it is the most exposed to high climatic stress and is directly affected by El Niño and La Niña events. In this volatile ecosystem, fish have been led to develop adaptive strategies in space and time. In this paper, we attempt to understand the mechanisms underlying such strategies, focusing on the El Niño 1997–98 in Peru from which an extensive set of hydrographic, capture and acoustic survey data are available. An integrated analysis of the data is crucial, as each has substantial shortcomings individually; for example, both catch data and acoustic surveys may easily lead to wrong conclusions. Existing hypotheses on anchovy and sardine alternations lead us to a ‘habitat‐based’ synthetic hypothesis. Using our data, an integrated approach evaluated how fish responded to habitat variation, and determined the consequences in terms of fish‐population variability. Various factors occurring at a range of different spatio‐temporal scales were considered: interdecadal regime (warm ‘El Viejo’/cool ‘La Vieja’ decadal scale); strength and the duration of the El Niño Southern Oscillation event (interannual scale); population condition before the event (interannual scale); fishing pressure and other predation (annual scale); changes in reproductive behaviour (intra‐annual scale); presence of local upwelling (local scale). During El Niño 1997–98, anchovy was able to exploit a small‐scale temporal and spatial ‘loophole’ inside the general unfavourable conditions. Moreover, sardine did not do better than anchovy during this El Niño and was not able to take advantage of the ‘loophole’ opened by this short‐term event. Our results question the traditional view that El Niño is bad for anchovy and good for sardine.  相似文献   

La改性MCM-41在线催化提质生物油研究     

李小华  胡超  张小雷  董良秀  蔡忆昔  邵珊珊 《农业机械学报》2018,49(7):296-302

选取油菜秸秆为试验原料,采用浸渍法对MCM-41分子筛进行不同负载量的La改性,利用La/MCM-41分子筛在两段式反应器上进行生物质真空热解在线催化提质制备生物油的试验研究。通过XRD、SEM、Py-IR等方法对MCM-41分子筛进行了表征分析,研究了金属La的引入对生物油有机相理化特性的影响。结果表明,经La改性后的MCM-41保持了载体高度有序的六方型结构,且La/MCM-41表面B酸和L酸的酸量进一步增强;La/MCM-41分子筛能有效降低生物油有机相中酸、醛、酮类等物质的含量,提高烃类物质的含量;当La负载量为5%时,生物油有机相产率增加到18.83%,p H值显著提高并趋向中性,有机相热值高达33.69 MJ/kg,有机相中烃类物质相对峰面积达到34.59%,且以单环芳香烃为主。  相似文献   

硝酸镧处理对短穗鱼尾葵幼苗耐寒性的影响   总被引：2，自引：1，他引：1  

阮志平  王芬芬  黄全能  姚碧艳  李振基 《热带作物学报》2011,32(6):1055-1059

为探明硝酸镧对短穗鱼尾葵(Caryotamitis)耐寒生理指标的影响,用4个不同浓度的硝酸镧溶液(0、100、350、500mg/L)喷施盆栽短穗鱼尾葵叶片,经变温处理后检测各项耐寒指标。结果表明,超氧化物歧化酶(SOD)、过氧化物酶(POD)、丙二醛(MDA)、脯氨酸、可溶性蛋白和叶绿素的含量表现出明显的浓度效应,而且25℃恢复后幼苗叶片的各项耐寒指标的模糊隶属函数值分别为0.41、0.46、0.70、0.50,其中350mg/L硝酸镧溶液处理对提高短穗鱼尾葵幼苗的耐寒性具有显著的效应。  相似文献   

镧和铈对杂色云芝生长及其漆酶活性的影响     

徐淑霞  唐艳红  张世敏  郑茜  吴坤 《河南农业大学学报》2007,41(5):556-558,564

研究了镧(La3 ),铈(Ce3 )对杂色云芝(Coriolus versicolor)生长和漆酶活性的影响.结果表明,La3 和Ce3 促进了杂色云芝的持续生长.La3 浓度20μmol.L-1培养9 d时,所产漆酶能力提高26.69%;Ce3 浓度20μmol.L-1培养10 d时,产漆酶能力提高15.82%.La3 浓度在8μmol.L-1以下对发酵液的漆酶活性有促进作用,在8μmol.L-1以上对其酶活性有抑制作用;Ce3 浓度在50μmol.L-1以下对发酵液的漆酶活性有促进作用,在50μmol.L-1以上对其酶活性有抑制作用.  相似文献   

我国北方大面积干旱成因分析   总被引：2，自引：0，他引：2  

迟鹏  张升堂 《安徽农业科学》2011,(19):11464-11466

2010～2011年冬季我国北方地区发生大面积持续干旱,部分地区干旱程度达到了特大干旱。资料显示,至今旱情仍来得到有效缓解。根据相关资料,分析了干旱发生过程中气温的异常、降水量的明显变化以及大气环流等原因。结果表明,2010—2011年我国北方大部分地区温度偏低、降水量明显减少、大气环流场异常等自然因素以及人为因素是造成干旱灾害的主要原因,并揭示了温度、降水量、大气环流等原因与“拉尼娜”现象的关系,说明“拉尼娜”现象间接地造成此次旱灾。  相似文献   

La对Cd胁迫下大豆膜脂过氧化及POD活性的影响   总被引：2，自引：2，他引：2  

刘冰  梁婵娟  徐雪松  周青 《农业环境科学学报》2005,24(2):214-216

利用水培方法研究了稀土镧(LaC l3)对不同C d浓度(20、50、80m g·L-1)胁迫下大豆幼苗膜脂过氧化及PO D活性的影响。实验表明,C d胁迫下叶绿素含量降低,质膜透性增大,M D A含量上升,PO D活性提高,且随C d浓度上升变幅增大;适量的La(20m g·L-1)在一定程度上缓解C d伤害,且对低浓度胁迫的防护效应优于高浓度。考察0～80h动态变化时发现,不同处理条件下,各项生理生化指标的动态变化曲线不尽一致,皆非简单的线性过程,同时也反映出相应的剂量效应和防护效果的差异。  相似文献   

镧对镉胁迫羽衣甘蓝的调节效应     

郭凯  谈成林  王友保  张洁  惠勇 《安徽农业科学》2011,(17):10239-10240,10390

[目的]为花卉植物用于cd污染土壤栽培提供依据。[方法]采用水培试验研究了镧（工丑）对羽衣甘蓝受到镉（Cd）胁迫的调节效应。[结果]低浓度的cd对羽衣甘蓝的出芽率、株高、根系、地上和地下鲜重与千重等指标均有一定的抑制作用，高浓度的cd对其有明显的抑制作用，而一定浓度的La可以缓解这种抑制作用。[结论]5mg／LLa缓解高浓度cd对羽衣甘蓝种子出芽以及生长等各项指标的抑制作用效果最好。  相似文献