The Survey and Drawing of Common Cylinder Worm     

Qiu Lelu Zheng Mingyu 《保鲜与加工》1998,(2):106-110

This paper focuses on the standarization of common cylinder worm transmission in the methods and procedures of the survey and drawing.  相似文献   

田间作业机组合理编组的理论计算及程序设计     

王启善  邱立春  王大力  王志刚 《农业工程学报》1999,15(2):94-95

拖拉机与农具组成的田间作业机组,要实现机器本身结构和性能与之配套机具的系统协调,获得最佳的运用效果,要进行合理编组计算。该文规范了机组合理编组的理论计算步骤并用ＴｕｒｂｏＣ语言编写了计算机程序。该程序可完成田间三大类作业的合理编组计算工作,如略加修改可以满足更多种机型完成各种作业的合理编组的计算。经上机运算准确、可靠、快捷、方便。  相似文献   

三峡库区鱼类环境和污染状况   总被引：2，自引：0，他引：2  

何力  邱成松 《湖北农学院学报》1999,19(4):328-331

三峡库区的自然环境适合于多种鱼类的生长,库区水质表现一定的季节变化,水体中大肠杆菌和铜等超标;鱼体内主要污染物为Ｃｄ,Ｃｒ,Ａｓ等,但未超标,食用品质较好;鱼样外周血红细胞微 ０．８２‰－４．２８‰,表明水质对鱼体细胞具诱变作用。  相似文献   

茶叶中自由基的研究   总被引：8，自引：0，他引：8  

刘国根  罗泽民  邱冠周  李娟 《湖南农业大学学报(自然科学版)》1999,25(4):290-292

利用ＥＳＲ波谱技术对不同茶类成茶和苦丁茶,七叶参茶的自由基进行了较系统的研究,结果表明：茶叶中含有大量的稳定的自由基,不同成茶自由基含量因茶类不同而有较大差异,各茶类自由基含量高低依次为黑茶、青茶、红茶、黄茶,绿茶、白茶。  相似文献   

利用RAPD分析药用石斛的遗传多样性及亲缘关系   总被引：3，自引：0，他引：3  

邱婧  樊洪泓  李廷春  林毅  蔡永萍 《中国林副特产》2008,(4):9-11

通过对9种药用石斛进行遗传多样性和亲缘关系的分析,为更好地开发利用石斛资源奠定基础。采用RAPD技术,应用NTSYS软件对9种石斛的RAPD-PCR结果进行分析。利用从103条随机引物中筛选出的70条随机引物对供试材料DNA进行随机扩增,共得到520条带,其中多态性带有491条,多态性百分率为94.42%。采用UPGMA类平均法对扩增出的谱带进行遗传聚类分析,得出反映各种间亲缘关系的树状图。在遗传距离（D）=0.44处,可将供试材料分为2类,RAPD对基因组的分析结果与传统分类学的结果差异不大。试验结果表明,RAPD技术可有效地应用于药用石斛的遗传多样性及亲缘关系的研究。  相似文献   

Antagonistic activity and protective effect of a Bacillus subtilis isolate against fish pathogen Edwardsiella piscicida     

Ren  Xiaomeng  Wu  Binbin  Zhao  Feng  Qi  Lingling  Qiu  Xianfeng  Li  Ran  Yang  Sisi  Liu  Fuguo  Yi  Ganfeng  Ding  Xuezhi  Xia  Liqiu  Sun  Yunjun 《Fisheries Science》2019,85(6):1011-1018

Fisheries Science - Bacillus subtilis ZFB19 isolated from the intestine of healthy grass carp exhibited considerable antagonistic activity against Edwardsiella piscicida which was resistant to...  相似文献   

The antioxidant status,apoptosis, intercellular integrity and immune function of grass carp (Ctenopharyngodon idella) head kidney and spleen fed different levels of pyridoxine     

Wei-Dan Jiang  Xin Zheng  Lin Feng  Pei Wu  Yang Liu  Jun Jiang  Sheng-Yao Kuang  Ling Tang  Xiao‐Qiu Zhou 《Aquaculture Nutrition》2020,26(3):613-630

This study was carried out to investigate the effects of dietary pyridoxine (PN) on the antioxidant status, apoptosis, intercellular integrity and immune function of head kidney and spleen in young grass carp (Ctenopharyngodon idella). Results showed that compared with the optimal PN level, (a) PN deficiency decreased antioxidant enzyme activities and down‐regulated the mRNA levels of antioxidant enzymes, NF‐E2‐related factor 2 (Nrf2), myeloid cell leukaemia‐1 (Mcl‐1) and tight junction proteins, whereas it increased the contents of reactive oxygen species (ROS), malondialdehyde (MDA) and protein carbonyl (PC), and up‐regulated the mRNA levels of cysteinyl aspartic acid‐protease (caspase), Fas ligand (FasL), p38 mitogen‐activated protein kinase (p38MAPK) and myosin light chain kinase (MLCK) in the head kidney and spleen of fish (p < .05). (b) PN deficiency decreased lysozyme (LZ) and acid phosphatase (ACP) activities, and complement contents, and down‐regulated the mRNA levels of antibacterial peptides, anti‐inflammatory cytokines, inhibitor of κBα (IκBα) and target of rapamycin (TOR), whereas it up‐regulated the mRNA levels of pro‐inflammatory cytokines and nuclear factor kappa B p65 (NF‐κBp65) in the head kidney and spleen of fish (p < .05). (c) Dietary PN requirements of grass carp based on the malondialdehyde content and lysozyme activity were estimated as 4.97 and 4.99 mg/kg diet, respectively.  相似文献   

Use of salmon by‐product meals as a replacement for anchovy meal in practical diets for the Pacific white shrimp (Litopenaeus vannamei)     

Jingping Guo  Anneleen Swanepoel  Xuan Qiu  Joo Reis  Melanie Rhodes  D. Allen Davis 《Aquaculture Nutrition》2020,26(2):490-501

A series of trials were conducted with Pacific white shrimp Litopenaeus vannamei, to evaluate the efficiency of two salmon meals as compared to anchovy meal. The basal diet contained 200 g/kg anchovy meal, which was systematically replaced (0%, 50%, 75% and 100%) with salmon meal on an isonitrogenous basis. Another two diets were formulated with a hydrolysed salmon meal to replace 50% and 100% anchovy meal. Each diet was randomly fed to four replicate groups of 25 and 30 shrimp per tank in clear (indoor) and green (outdoor) water trials, respectively. The results showed that growth performance and feed conversion ratio were not statistically different when salmon meal replaced anchovy meal in both trials. However, when hydrolysed salmon meal was used to replace 100% of the anchovy meal, growth performance of the shrimp significantly decreased. The four kinds of fish meal (anchovy, salmon by‐product meals and menhaden) were evaluated in an ingredient digestibility trial using the 70:30 replacement technique. In general, dry matter, energy, protein and individual amino acids digestibility of salmon meal were significantly higher than those of menhaden and anchovy meal. Results of this study demonstrated that salmon meals are a good protein sources which can replace anchovy meal.  相似文献   

桉树扦插苗茎腐病防治试验     

徐家雄  林明生  陆旭  邱焕秀  陈瑞屏  林昌明  钟岁英 《广东林业科技》2006,22(3):50-52

桉树苗茎腐病主要发生在桉树插穗扦插后10 d期间,且不同无性系间发病率存在明显差别。防治结果表明:在桉树扦插苗发育期间,用50%DGL可湿性粉剂、53.8%KCD干悬浮剂、80%DSX可湿性粉剂、75%BGC可湿性粉剂和40%D.L悬浮剂喷雾,每隔10 d 1次,连续用药4次,能够防治茎腐病的发生与危害,5种供试药剂的防治效果均达到82%~86%,防治的成本很低,仅为4.5元/万株苗。  相似文献   

广东省水源涵养林营造的原则与技术要求     

刘敏  邱治军  周光益  曾锋 《广东林业科技》2006,22(3):109-112

文章根据广东省水源涵养林建设实际情况,并就广东省地方标准《水源涵养林营造技术规程》的主要内容,重点介绍了水源涵养林营造的原则与技术要求,对规范广东水源涵养林建设具有一定的指导作用。  相似文献