星星草治理草原碱斑的效果与种植技术     

赵喜印  佟振宇 《草业科学》1992,9(5):61-62

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PEG诱导水分胁迫对柑桔幼苗细胞质膜透性及脯氨酸含量的影响   总被引：3，自引：0，他引：3  

张云贵  谢永红  吴学良  毛启才 《果树学报》1995,(Z1)

柑桔叶片相对含水量(RWC)随聚乙二醇(PEG)处理渗透势的降低而依次降低;叶片细胞质膜透性随PEG处理浓度的增加而依次增大;幼苗叶片累积脯氨酸的数量随水分胁迫时间和强度递增。  相似文献   

眼镜蛇取毒饲养生产试验     

梁秋霞  杨易海 《浙江林业科技》1994,14(2):34-35

常山县龙尧乡进行眼镜蛇取毒饲养试验表明：取毒时间，每１０ｄ取毒１次，可正常饲养，同时也提高了蛇毒产量。每１ｋｇ眼镜蛇，可得蛇毒液７．０８２４ｇ／ａ，蛇毒干品２．０８３２ｇ／ａ。  相似文献   

如东县鸡腿病病因的调查研究   总被引：2，自引：0，他引：2  

张国梅  孙卫东 《畜牧与兽医》1994,26(5):215-218

本文对如东县４０个养鸡户的鸡腿病进行了门诊与跟踪调查。从传染病、营养代谢病及饲养管理三个方面对发病原因进行了初步的探讨。结果表明：营养缺乏和代谢紊乱（特别是钙、磷）是该县鸡腿病的主要原因，传染性腿病如疑似病毒性关节炎、禽脑脊髓炎、葡萄球菌性关节炎等也不容忽视。  相似文献   

敌百虫对国光、金冠苹果疏除幼果的效应     

郭宝林  杨俊霞  赵文魁  刘洪山  崔国义 《果树学报》1993,(2)

敌百虫对国光、金冠苹果疏果效应的研究结果表明,国光盛花后10d 喷布1125mg·1~(-1)敌百虫或加20mg·1~(-1)NAA;金冠盛花后12d 喷布900mg·1~(-1)敌百虫或加10mg·1~(-1)NAA,疏除幼果效应显著.果实单果重、翌年花量增加;果实品质、经济效益提高;大小年幅度降低.  相似文献   

保护地黄瓜叶片光合作用温度特性的研究   总被引：53，自引：5，他引：48  

徐克章  史跃林 《园艺学报》1993,20(1):51-55

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两种一年生植物在替代试验中的相互竞争关系   总被引：18，自引：4，他引：14  

杜国祯  王刚等 《草业学报》1993,2(1):6-14

（1）用替代试验研究了燕麦（Aneva sativa）和箭舌豌豆（Vicia sativa）在混播中的竞争相互作用。为了攻混播比例对两种植物在混播条件下的行为影响，田间试验设为5个混播总密度和5种混播比例，共了5次。（2）方差分析表明，相对总生物量（RYT）和竞争平衡指数（CBI）对总密度，混播比例和生长时间的反应敏感。总密度对RYT和CBI的影响高度显著，在大多数情况下，混播比例对RYT和CBI的影响不显著。（3）本文研究的结果表明，持续时间对RYT和CBI很强的影响，在第1次测定时，RYT值接近1而BI值接近0，这一事实表明，种间无竞争或互惠作用。而在生长旺盛期，种间竞争较为剧烈。（4）本研究结果表明，箭舌豌豆的生长严惩受到燕麦的抑制作用，这说明箭舌豌豆在与燕麦混播时表现为竞争上的弱者。  相似文献   

小麦抗赤霉病基因库轮回选择效果的初步研究   总被引：5，自引：1，他引：4  

蒋国梁  陈兆夏 《南京农业大学学报》1991,14(2):6-11

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The effect of exploratory laparotomy on the serum and peritoneal haptoglobin concentrations of the pony.   总被引：1，自引：0，他引：1       下载免费PDF全文

T E Eurell  D A Wilson    G J Baker 《Canadian journal of veterinary research》1993,57(1):42-44

Serum haptoglobin concentration was used as an indicator of the acute phase response in ponies undergoing exploratory laparotomy. Preoperative, 1 h intraoperative, 3 h, 6 h, 12 h and 24 h postoperative blood samples and 48 h postoperative peritoneal fluid samples were obtained for haptoglobin analysis. A spectrophotometric assay based on cyanmethemoglobin binding capacity (CyanBC) was used to determine haptoglobin concentrations. The preoperative reference range for serum haptoglobin concentrations in these ponies was 25-60 mg CyanBC/dL. Intraoperative and 3 h postoperative blood samples had decreased haptoglobin concentrations when compared to preoperative values. Serum haptoglobin concentrations began to rise by the 6 h postoperative sample and were generally elevated above preoperative values by the 24 h postoperative sample. Two of the ten ponies had mild signs of postoperative colic which were associated with twofold elevations in serum haptoglobin concentrations and fivefold elevations in peritoneal fluid haptoglobin concentrations.  相似文献   

Feline leukemia virus detection by immunohistochemistry and polymerase chain reaction in formalin-fixed, paraffin-embedded tumor tissue from cats with lymphosarcoma.          下载免费PDF全文

M L Jackson  D M Haines  S M Meric    V Misra 《Canadian journal of veterinary research》1993,57(4):269-276

The prevalence of feline leukemia virus (FeLV) antigen and DNA was assessed in formalin-fixed, paraffin-embedded tumor tissues from 70 cats with lymphosarcoma (LSA). Tissue sections were tested for FeLV gp70 antigen using avidinbiotin complex (ABC) immunohistochemistry (IHC); DNA was extracted and purified from the same tissue blocks for polymerase chain reaction (PCR) amplification of a 166 base pair region of the FeLV long terminal repeat (LTR). Results were related to antemortem FeLV enzyme-linked immunosorbent assay (ELISA) for serum p27 antigen, anatomic site of LSA, and patient age. Viral DNA was detected by PCR in 80% of cases and viral antigen by IHC in 57% of cases. Seventeen cases were PCR-positive and IHC-negative; one case was PCR-negative and IHC-positive. Clinical records included FeLV ELISA results for 30 of 70 cats. All 19 ELISA-positive cats were positive by PCR and IHC; of the 11 ELISA-negative cats that were negative by IHC, seven were positive by PCR. When evaluated according to anatomic site, FeLV DNA and antigen were detected less frequently in intestinal LSAs than in multicentric and mediastinal tumors. Lymphosarcoma tissues from cats < 7 yr were several fold more likely to be positive for FeLV antigen by IHC than were tumors from cats > or = 7 yr. However, there was no significant difference in PCR detection of FeLV provirus between LSAs from cats < 7 yr and those > or = 7 yr.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献