Analysis on Schistosomiasis Occurrence And Preventive Measures in Three Gorges Reservoir     

SUN Qixiang ZHANG Jianfeng* . Silvicultural Laboratory of State Forestry Administration  Research Institute of Forestry Chinese Academy of Forestry  Beijing  P.R.China . International Center for Bamboo & Rattan  Bamboo & Rattan Laboratory of SFA  Beijing  P.R. China 《中国林业科技(英文版)》2007,6(1):82-86

Recently, due to more flooding, schistosomiasis is in expanding tendency in some areas. With Three Gorges Engineering progress, schistosomiasis will occurr potentially in Three Gorges reservoir. In order to control the disease, some methods must be applied, e.g. chemicals, biological measures. To some extent every way has its specific effect. However, the vital way is improving the environment and reducing the amount of snails. One of the effective ways is conducting forestry ecological engineering that focuses on snail control and schistosomiasis prevention. The practical ways cover such as pollution controlling, ditches surface hardening. Especially for water-level-fluctuation zone, conducting forestry ecological engineering to improve environment to prevent snails＇ propagation is significant and vital. By operating the project environment could be greatly improved and people＇s living conditions would be bettered.  相似文献   

北京地区节水型屋顶绿化植物配置及养护     

王雅楠 巨关升*刘俊祥  杜小娟许新桥 孙振元 《农业科技与信息》2014,(3):7-11

节水型屋顶绿化是北京地区增加城市绿化面积,改善城市生态环境的重要手段。本文通过查阅文献、实地调查和总结分析,从植物生长的条件和配置原则出发,归纳了北京地区屋顶绿化常用的植物材料,提出适合北京地区节水型屋顶绿化的植物选择原则,并根据这些原则,提出了推荐北京地区节水型屋顶绿化使用的乔木植物油松(Pinustabulaeformis)等15种、灌木植物大叶黄杨(Buxusmegistophylla)等27种、地被植物景天类(Sedum spectabilis)等13种,推荐了喷灌、滴灌和渗灌等3种可用于屋顶绿化的节水灌溉技术,并简要介绍了屋顶绿化的修剪要求,为北京地区节水型屋顶绿化的推广提供了理论依据和技术支持。  相似文献   

林业常用16种杀虫剂对赤眼蜂的急性毒性和安全性评价   总被引：1，自引：0，他引：1  

徐华强  薛  明*  赵海朋 《林业科技》2014,(2):10-13

采用管测药膜法测定了16种杀虫剂对松毛虫赤眼蜂的急性毒性,并进行安全性评价。急性毒性测定的结果表明:苏云金杆菌、球孢白僵菌、灭幼脲、杀铃脲、甲氧虫酰肼、苦皮藤素对松毛虫赤眼蜂毒性较低,其LR50均高于9.16×10-3mg·cm-2,为低风险性药剂。甲氨基阿维菌素苯甲酸盐、啶虫脒、噻虫啉、辛硫磷、高效氯氟氰菊酯、吡虫啉、氟虫腈和阿维菌素对松毛虫赤眼蜂毒性较高,其LR50分别是2.28×10-4、9.81×10-5、5.23×10-5、2.43×10-5、1.39×10-5、4.33×10-6、2.10×10-6和1.92×10-6mg·cm-2,安全性评价均为高风险性和极高风险性。敌敌畏对松毛虫赤眼蜂的毒性最高,其LR50是1.11×10-6mg·cm-2;其次为虫螨腈,LR50是1.31×10-6mg·cm-2,对松毛虫赤眼蜂伤害均较严重。  相似文献   

热应激诱导大鼠小肠昼夜节律基因差异表达的研究Heat stress induced different circadian rhythms genes expression in rat small intestine     

赵宏  种新禄  陈佳佳  何莎莎  万长荣  刘凤华*ZHAO Hong  CHONG Xinlu  CHEN Jiajia  HE Shasha  WAN Changrong  LIU Fenghua* 《北京农学院学报》2013,(4)

采用石蜡切片H.E染色观察热应激大鼠小肠形态学变化，利用Realtime-PCR技术对小肠中昼夜节律相关基因的表达进行研究。结果：大鼠小肠上皮出现严重损伤，肠黏膜绒毛顶端上皮细胞脱落，固有层裸露；热应激导致Per2和DBP基因瞬时表达极大升高，节律性受到严重影响，Bmal1基因瞬时表达差异不明显，其mRNA表达量峰值后移。To observe the morphological changes in response to heat stress, rat small intestine was embedded in paraffin, sectioned in transverse and stained with hematoxylin and eosin. The expressions of genes related to circadian rhythms were detected by Realtime-PCR. Results: heat stress resulted in profound damage to the epithelium of rat small intestine, the villus tips shed into lumen and the lamina propria was exposed; the gene expressions of Per2 and DBP were significantly increased so after the heat stress and the rhythms was affected; heat stress could not induce Bmal1 different expression immediatley, whereas, the peak of mRNA was hysteretic.  相似文献   

Study of Differentiation and Characteristics of Sieve Elements and P-protein Body in Ginkgo biloba     

LING Yuping * CHEN Peng LI Li WANG Lili PAN Bin TAI Yunlin . Department of Horticulture  College of Agronomy  Yangzhou University  Yangzhou  P. R.China . Department of Plant Science  McGill University    Lakeshore RoadSte. Anne de Bellevue  Quebec  Canada HX V 《中国林业科技(英文版)》2006,5(3):44-51

INTRODUCTION After his study in the change of liver cell in human body, Kerr (1972) discovered Programmed Cell Death (PCD), a cell death model totally different from cell necrotic death, in which the cell necrosis usually appears typically as break of the protoplasm membrane and inflammatory leak of cell inclusions, which is a kind of abnormal process. PCD is a kind of active, physiologic death process. This kind of cell death process can helpthe body to eliminate decrepit, excrescent …  相似文献   

4种除草剂对紫花苜蓿-根瘤菌共生固氮的影响   总被引：2，自引：1，他引：2  

王利平  王金信  孙艾蕊  鲁梅  刘淑华 《农业环境科学学报》2006,25(Z1):114-117

在室内条件下,研究了乙羧氟草醚、三氟羧草醚、乙草胺和异丙甲草胺等4种除草剂对紫花苜蓿-根瘤菌共生固氮的影响。结果表明:4种除草剂均能对紫花苜蓿-根瘤菌共生固氮产生一定的抑制作用,其中以乙羧氟草醚的抑制作用最强,在高剂量下鲜重抑制率和干重抑制率分别为68.5%,70.6%,与对照植株的结瘤率和总含氮量92%和2.620%相比,其结瘤率和总含氮量为31%和0.072%;异丙甲草胺的抑制作用最弱,高剂量下鲜重抑制率和干重抑制率分别为18.5%和26.8%,与对照植株的结瘤率和总含氮量94%和2.136%相比,其结瘤率和总含氮量为60%及0.482%;紫花苜蓿经四种除草剂不同剂量处理后,总含氮量远远低于对照植株的总含氮量。  相似文献   

烟嘧磺隆的研究与开发进展   总被引：3，自引：0，他引：3  

徐加利  王金信  高兴文 《山东农业大学学报(自然科学版)》2007,38(1):151-154

本文概述了烟嘧磺隆除草剂的发现过程、作用机理、合成研究及其应用开发进展和市场前景。  相似文献   

棉蚜对不同类型杀虫剂的抗性发生规律     

于金凤  王金信 《山东农业大学学报(自然科学版)》1997,28(3):315-319

用溴氰菊酯、久效磷、灭多威及硫丹４种杀虫剂以浸渍法分别累代处理敏感棉蚜，选育至１６代，棉蚜对溴氯菊酯的抗性倍数达６７１９倍，对灭多威，久效磷及硫丹的抗性倍数分别为１９．９、１０．７和８．５倍。用计算机模拟预测棉蚜对４种药剂的抗性发展速度，若用上述４种药剂连续选育３２代，则棉蚜对溴氰菊酯、灭多威，主效磷及硫丹的抗药性将分别达６０７２１．７、２７９．３、１６．９０及６９．２倍。  相似文献   

中国北方部分地区麦田荠菜对苯磺隆的抗性水平   总被引：9，自引：2，他引：7  

刘君良  王金信  刘伟堂  金涛  李小芳  毕亚玲 《农药学学报》2011,13(4):347-353

为明确北方地区冬小麦田荠菜对苯磺隆的抗性水平,运用培养皿法和温室盆栽法分别测定了山东、山西、河南、河北、陕西5省13个地区采集点麦田潜在抗药性生物型对苯磺隆的抗性水平,并分别测定了驻马店梁祝镇采集点荠菜潜在抗药性生物型和敏感生物型乙酰乳酸合成酶(ALS)对苯磺隆的敏感性。培养皿法测定结果表明:驻马店梁祝镇采集点荠菜抗药性生物型对苯磺隆的抗性水平最高,抗性倍数为6.17倍,其他采集点荠菜抗性倍数在0.94～2.04倍之间,仍处于较为敏感状态。温室盆栽法测定结果表明:驻马店梁祝镇采集点荠菜抗性倍数仍为最高,达到233倍, 其他地区采集点荠菜抗性倍数在1.23～3.73倍之间,尚未产生明显的抗药性。离体条件下,苯磺隆对荠菜抗药性和敏感生物型ALS的抑制中浓度(IC50)分别为0.664 μmol/L和0.053 3 μmol/L,抗药性生物型的抗性倍数达12.5倍。结果表明,驻马店梁祝镇采集点荠菜已对苯磺隆产生了较高水平的抗药性,而其体内ALS敏感性降低可能是抗药性产生的原因之一。  相似文献   

马铃薯及土壤中丙炔噁草酮的气相色谱残留分析方法     

谢云峰  于建垒  宋国春  李瑞娟  王金信  毕亚玲 《农药科学与管理》2012,33(3):28-33

建立了测定马铃薯及土壤中丙炔噁草酮及其代谢物RP017272和RP025496残留的气相色谱检测方法。植株、块茎样品以乙腈作为提取溶剂,土壤以二氯甲烷作为提取溶剂,选用KB-5（30m×320m×0.33m）色谱柱分离,电子捕获检测器定量检测丙炔噁草酮及其代谢物。该方法丙炔噁草酮及其代谢物的最小检出量均为5×10-12g,丙炔噁草酮、RP017272、RP025496的线性相关系数分别为0.999 2、0.998 6、0.997 2。丙炔噁草酮在马铃薯植株、块茎及土壤中的加标回收率为90.6-96.7%,相对标准偏差（RSD）为1.1-2.4%,RP017272和RP025496在土壤中的加标回收率为88.1-95.4%,相对标准偏差（RSD）为1.5-3.3%。方法具有简便、快捷,准确的特点,适合马铃薯植株、块茎及土壤中丙炔噁草酮及其代谢物残留量的测定。  相似文献