论生态旅游、生态旅游系统及其基本特征     

徐文君  张秀萍  何灵 《内蒙古林业调查设计》2006,29(2):66-68,70

文章通过研究生态旅游概念,探讨了生态旅游系统组成要素及其本质内涵与特征。  相似文献   

胶束分光光度法测定环境样品中的痕量锰     

陈同森  张建云 《湖南农业大学学报(自然科学版)》1993,20(4)

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Sensitivity of four Yeasts to Fungicides and CO2 Concentrations and Their Antagonistic Ability in Combination with Fungicide to pathogenic Fungi in vitro     

TIAN Shi-ping  YAO Hong-jie  QIN Guo-zheng  XU Yong  FENG Xiao-yuan 《中国农业科学(英文版)》2004,3(3)

The yeasts Cryptococcus laurentii,Trichosporon pullulans,Rhodotorula glutinis and Trichosporon sp.were used to investigate their sensitivity to four fungicides and different concentrations of CO2,as well as their antagonistic ability to Penicilliumexpansum and Alternaria alternata in vitro when applied with fungicide.There were significant differences in sensitivity to the fungicides among the different yeasts(P = 0.05).R.glutinis was more sensitive to Deccocil,Iprodione and Stroby as compared to other yeasts.Combination antagonistic yeasts with fungicide could more significantly enhance biocontrol ability of the yeasts against the pathogenic fungi in vitro(P = 0.05).C.laurentii was the most effective antagonist among the four yeasts and could completely control spore germination of P.expansum and A.alternata when combined with Stroby at the concentration of 100 μL L-1.The yeasts,except R.glutinis,could grow well on nutrient yeast dextrose agar (NYDA) after 8 d incubation even at 20% CO2 concentration at 25℃.Particularly Trichosporon sp.showeda better adaptability to low temperature as compared to other antagonists.  相似文献   

Advances on Class 10 Pathogenesis-related Proteins     

Xie Chunzheng  Liu Haiyan  Li Ling  Liang Xuanqiang 《分子植物育种》2008,6(5)

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体外法评定不同组合酶制剂对饲料黏度的影响     

唐茂妍  陈旭东  徐玲 《饲料广角》2009,(19):35-37

试验采用胃蛋白酶-胰酶两步水解法，探讨非淀粉多糖（NSP）酶的组成及活性对特定蛋鸡日粮的黏度影响．从而筛选出对于特定组成蛋鸡日粮的最佳复合酶制剂配方．为针对特定地区日粮筛选优化NSP酶提供快捷有效的方法。试验以饲料黏度变化为检测指标．建立了NSP酶添加量与离体黏度的对应关系。结果表明：组合NSP酶作用效果显著优于单一NSP酶．日粮中NSP种类和含量决定了NSP酶的最佳酶谱和最适添加量．  相似文献   

猪流行性腹泻的诊断与综合防治     

黄捷  王令 《广东畜牧兽医科技》2003,28(4):34-36

猪流行性腹泻(Porcine epidemic diarrhea,PED)是由猪流行性腹泻病毒(PEDV)引起的一种以腹泻、呕吐和脱水为主要特征、与传染性胃肠炎(Transmissible gastroenteritis,TGE)极相似的急性肠道传染病,此病最早在英国报道,随后,欧洲许多国家如比利时、捷克、匈牙利、西德等地均被发现,被称流行性病毒腹泻(Epidemic virus diarrhea,EVD),直到1978年Pensaert等才从病料中分离出这种病毒来。我国从80年代以来,广东、上海、北京、福建、青海、辽宁等地都多次报道有PED的流  相似文献   

宁陕县城区生态环境治理工程初探     

秦鱽亚 《陕西林业科技》2006,(3):93-96

介绍并分析宁陕县城区及周边地区“8．29”惨遭洪水、泥石流袭击,生态环境遭到严重破坏的情况,提出了城区生态环境方面存在的问题,同时在规划设计方案中运用生态治理技术,以工程造林的方法,探求城区生态环境建设的新模式。  相似文献   

Influence of environment on adrenal cortical response to ACTH stimulation in clinically normal dogs.     

G C Vial  G H Stabenfeldt  C E Franti  G V Ling 《American journal of veterinary research》1979,40(7):919-921

Effect of testing environment on adrenal cortical responses to an injection of ACTH in clinically normal dogs was examined in three locations, presumably of increasing order of stress elicitation: in a home; veterinary hospital (VH), 4 hours in a cage; and VH, overnight in a cage. Basal cortisol (hydrocortisone) values for plasma were significantly lower (P less than 0.001) for the home group (1.8 microgram/dl) when compared with values for the VH, 4-hour cage (3.8 microgram/dl) or the VH, overnight cage (3.9 microgram/dl) groups. However, significant differences (P greater than 0.05) were not observed 2 hours after ACTH admininstration for the home group (13.7 microgram/dl); VH, 4-hour cage group (14.8 microgram/dl); or VH, overnight cage group (16.0 microgram/dl). Responses of individual dogs were consistent (P less than 0.005). The testing environment did not markedly affect results of adrenal cortical function tests for dogs when ACTH stimulation was utilized. The response of dogs to ACTH, as monitored by immunologic assay techniques (competitive protein-binding assay or radioimmunoassay), was consistent and was useful as a diagnostic aid for adrenal malfunction.  相似文献   

浅谈HACCP在机制针形名茶中的应用     

邓敏  徐泽  张玲  胡翔 《西南园艺》2005,33(4):41-42

对HACCP作简要介绍，根据HACCP体系的要求，分析了机制针形名茶过程中各个环节可能出现的危害因素，用HACCP的原理确立了关键控制点，并且建立了相应的控制措施。  相似文献   

几种植物提取物和药剂对桃蚜和萝卜蚜生长发育的影响   总被引：9，自引：1，他引：9  

周琼  梁广文  曾玲 《中国蔬菜》2005,1(2):15-17

研究了苍耳提取物和合果芋(白蝴蝶)提取物以及常用天然药剂机油乳剂和 0. 3 %印楝素乳油对桃蚜和萝卜蚜实验种群的影响,两种提取物和药剂对桃蚜一龄若蚜的影响依次为: 0 3 % 印楝素乳油 (2 000×) >苍耳提取物(DW 0 04g·mL-1 ) >机油乳剂(400 ×) >白蝴蝶提取物(DW 0 04g·mL-1 ),对萝卜蚜一龄若蚜的影响依次为: 0. 3 %印楝素乳油(2 000×) >机油乳剂 ( 400×) >苍耳提取物 (DW 0. 04g·mL-1 ) >白蝴蝶提取物(DW 0. 04g·mL-1 );苍耳提取物对萝卜蚜实验种群有明显干扰控制作用,处理后萝卜蚜下代的种群增长量仅为对照的 24. 9 %;此外,苍耳提取物可延缓桃蚜和萝卜蚜的生长发育进程,使发育历期延长,对桃蚜的作用效果比对萝卜蚜的作用效果强;白蝴蝶提取物对萝卜蚜的实验种群也有一定的干扰作用,并可延长桃蚜的发育历期。  相似文献