吡虫啉的环境行为研究(一)──吸附性、移动性、挥发性及土壤降解、水解、光降解   总被引：10，自引：0，他引：10  

单正军  朱忠林  蔡道基 《农药科学与管理》1998,(4)

农药的环境安全评价是农药管理工作的重要内容,主要研究农药的环境行为特征及其对非靶生物的影响,本文对吡虫啉的主要环境行为特性进行研究,为评价该农药的环境安全性提供依据。  相似文献   

Differences in the behavior of the crossbred steers of different sire lines of Japanese Black cattle     

Katsuji UETAKE  Toshie ISHIWATA  Robert J. KILGOUR  Toshio TANAKA 《Animal Science Journal》2012,83(2):184-186

We determined differences in the behavior of the progeny of two major sire lines of Japanese Black cattle by recording the behavior of 35 and 70 half-sib steers of sires from fast (FG) and slow (SG) growing lines, respectively. Two sire lines of steers were mixed and allocated to nine pens with 11–12 animals per pen. The proportion of steers lying was significantly (P < 0.001) higher in the SG line (43.4 ± 5.7% compared to 40.3 ± 6.0%). The proportion of time spent eating concentrate feed (FG: 12.1 ± 2.3%; SG: 11.4 ± 2.1%), drinking (FG: 0.8 ± 1.1%; SG: 0.4 ± 0.6%), licking the feed trough (FG: 0.4 ± 0.6%; SG: 0.2 ± 0.4%) and performing tongue-playing (FG: 3.1 ± 4.6%; SG: 1.0 ± 1.9%) was significantly higher in FG, whereas the proportion of time spent resting (FG: 41.5 ± 12.8%; SG: 43.7 ± 10.9%) and performing self-licking (FG: 1.7 ± 1.4%; SG: 2.1 ± 1.3%) was higher in SG (all P < 0.05). These results show progeny of the FG sire engaged in more active behaviors compared to the progeny of the SG sire line.  相似文献   

管道工程环境与力学行为   总被引：1，自引：0，他引：1  

张怀法 《油气储运》2000,19(10):1-4

长输管道所处的环境比较复杂，主要包括所输送介质的环境，运行操作环境、管道周边环境、沿线自然环境与灾害环境以及管道的施工制造环境。在这些环境的作用下，管道将产生相应的力学行为，主要有承载行为，变形行为，断裂行为，疲劳行为和腐蚀行为，为保证管道工程的经济合理性，使管道长期平稳运行，就要在设计阶段将管道所处环境与相应产生的力学行为有机地结合起来，从这一角度出发，提出合理选择线路，正确选用选材，腐蚀控制、管道保护、施工控制和管理维护等6项措施。  相似文献   

Effect of Freezing Snow Disaster on Forest Fuel and Fire Behavior in Southern China     

《中国林业科技(英文版)》2009,(2)

After freezing snow disaster,stands of Pinus massoniana,Cunninghamia lanceolata. Liquidambar formosana,Cinnamomum camphora and Phyllostachys pubescens and new burned areas in Hunan Province were surveyed by setting field plots.Moisture content and fuel load were measured by sampling and fire behavior(such as rate of fire spread) was calculated.The results showed that fuel load got doubled instantly,fuel thickness enhanced,fuel continuity swelled and water content of fuel decreased as shrubs and herbs die...  相似文献   

Dispersal of black sea bass (Centropristis striata) larvae on the southeast U.S. continental shelf: results of a coupled vertical larval behavior – 3D circulation model     

K. P. EDWARDS  J. A. HARE  F. E. WERNER 《Fisheries Oceanography》2008,17(4):299-315

In the marine environment, pelagic dispersal is important for determining the distribution and abundance of populations, as well as providing connections among populations. Estimates of larval dispersal from spawning grounds are important to determining temporal and spatial patterns in recruitment that may have significant influences on the dynamics of the population. We present a case study of the dispersal of Centropristis striata (black sea bass) larvae on the southeast U.S. continental shelf. We use a coupled larval behavior – 3D circulation model to compare the effects of the timing and location of spawning against that of larval vertical migration on larval dispersal. Using the results of field data on larval vertical distributions, we compare the dispersal of virtual 'larvae' which have ontogenetic changes in vertical behavior with that of particles fixed near the surface and near the bottom. Larvae were released at potential spawning sites four times throughout the spawning season (February through May) for 3 yr (2002–04) and tracked for the assumed larval duration (from 27 to 37 days including the egg stage). Results indicate that adult behavior, in the form of spawning time and location, may be more important than larval vertical behavior in determining larval dispersal on the inner- and mid- continental shelves of this region.  相似文献   

论我国公务员行政道德行为的规制     

徐辉  刘艳 《湖南农机》2007,(5):96-98

公务员是国家公务的执行者,依法行使行政权力。在改革开放和建设有中国特色社会主义的伟大实践中,我国公务员队伍的主流是好的,有着良好的社会主义道德风尚。但是由于种种复杂的原因,导致一些公务员行政道德有一定程度滑坡,行政道德行为失范现象屡见不鲜,甚至出现腐败现象。因此,加强对我国公务员行政道德行为的规制,进一步完善我国公务员制度,意义重大。  相似文献   

论跨文化交际的障碍成因及能力培养     

雷旭辉 《四川畜牧兽医学院学报》2008,(3):137-140

不同的民族有不同的文化，随着全球化时代的到来，跨文化交际能力将日趋重要。笔者探讨了跨文化交际能力培养的内容，并在分析导致跨文化交际障碍成因的基础上，提出培养跨文化交际能力的相关建议。  相似文献   

Behavior of the Japanese rock crab 'Ishigani'Charybdis japonica towards two collapsible baited pots: Evaluation of capture effectiveness     

Miguel  VAZQUEZ ARCHDALE  Kazuhiko  ANRAKU  Tooru  YAMAMOTO  Naoya  HIGASHITANI 《Fisheries Science》2003,69(4):785-791

  相似文献   

2001年大火对扎龙自然保护区丹顶鹤栖息与繁殖的影响   总被引：8，自引：0，他引：8  

田家龙  贺福银  王建强  杨娇  靳玉平 《林业科技》2004,29(4):29-31

2001年8月末至10月扎龙自然保护区发生重大火灾，大火虽对保护区丹项鹤(Grus japonensis)的栖息地有一些影响，但对整个保护区丹项鹤的迁徙数量影响不大；对丹项鹤的营巢环境、巢址选择、巢材等因子产生较大影响，巢周围剩余芦苇面积、高度成为丹项鹤巢址选择的主要因子，次要因子是植被类型；大火对丹项鹤的始营巢期产生了影响，其营巢期较正常年份延缓4～5天。  相似文献   

拉市海越冬末期斑头雁行为的初步研究   总被引：7，自引：0，他引：7  

刘宁  李德品 《西部林业科学》2004,33(4):69-74,89

2004年2月18日～3月14对在拉市海越冬斑头雁的行为进行了研究，采用瞬时扫描方法进行行为取样，并对其在越冬地的行为进行观察记录。结果表明：斑头雁通常是早上7：30后飞离夜栖地，傍晚19：30以后从主要活动地飞回夜栖地。观察后期(3月7～13日)与观察前期(2月18～25日)相比，其飞离夜栖地的时间提前约20分钟，而从觅食地飞回夜栖地的时间则要晚10～25分钟。斑头雁无论取食还是夜栖，都喜集群，通常还有其他鸟类与斑头雁混群，如赤麻鸭等。3月初，有部分斑头雁开始北迁，大部分北迁是在3月中旬。越冬末期斑头雁行为时间的分配率为取食35．01％、静栖34．95％、警戒13．88％、运动8．35％、理羽6．77％、饮水0．63％、社群行为0．41％，所占比例依次减少。经对斑头雁在陆地和水域生境中的行为样本分别进行计算，表明斑头雁在这两种生境中有不同的行为时间分配模式。在陆地里，斑头雁的主要行为是取食(约占47％)，而在水域中，斑头雁的主要行为是静栖(约占46％)，表明斑头雁的食物主要是从陆地中获取。在一天中，斑头雁的不同行为出现的高峰时间不同，取食高峰时间和警戒高峰时间在早上9：00至10：00和傍晚17：30～19：15；静栖高峰时间在14：00～17：00；运动高峰时间在10：30～12：30；理羽高峰时间在14：30～17：00。  相似文献