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摘要
Tebuthiuron(N - [5 - (1,1 -二甲基乙基)-1,3,4 - 噻二唑- 2 – 基] - N,N'-二甲酰脲)出现用以控制河岸灌木saltcedar(柽柳),但是,它的使用受到限制,因为这种除草剂对水生系统的危害除草剂尚不明确。通过对对十2846-1三相开放系统的生物群落的审查,确定了tebuthiuron对水产品生产的可能影响。每个围隔中都沉积物,水,藻类,微生物和无脊椎动物和鱼类,而且是开放式的气氛中进行的气体交换,有大型无脊椎动物和藻类存活。下面是tebuthiuron剂量的使用,分别采用:0(对照组),10,70,200,500和1000µg/L。在对水体进行tebuthiuron浓度的检测后,得到以200µg/L '为近似的最高剂量的分水岭。Tebuthiuron不良影响分析中用分析纯数据,对围隔之间的变量进行相关性分析。控制浓度在200µg/L,平行做三次,以得到在此浓度下对水产品生产力影响的确切数据。沉积物对tebuthiuron的吸附用 Freundlich方程x /m= 3.24c ° 0 68来描述。在tebuthiuron存在下浮游植物初级生产力,摇蚊密度和生物量分别于摇蚊的浓度呈现负相关。相反,杂食性鱼类和除草剂浓度没有影响没有。200µg/L浓度时,只有摇蚊密度减少。在摇蚊密度减少的因素可能包括:1)在200µg/L下,产生变异,与藻类组合产生很大比例的‘难吃'生物量,2)剂量大于200µg/L '时,藻类的生产力降低,藻类在生物群落转移。200µgΙ-1下摇蚊的密度在减少表明, 200µg/L 'tebuthiuron浓度时会对水体产生有害影响。论文网 Tebuthiuron对水产品生产力的影响英文文献和中文翻译(5):http://www.youerw.com/fanyi/lunwen_39733.html