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chemical cotton
相关语句
  精制棉
     Application of chlorine dioxide in bleaching chemical cotton
     二氧化氯在精制棉漂白上的应用
短句来源
     When the chlorine dioxide is used in the bleaching technology,the best chemical cotton is produced, with its viscosity over 1 000 mPa s and the whiteness over 87%.
     国产精制棉采用二氧化氯漂白工艺,粘度可超过1000mPa·s,白度可达特级水平,创出国内一流的优质精制棉
短句来源
  相似匹配句对
     Chemical Controlment Technology of Cotton
     棉花化学调控技术
短句来源
     Application of chlorine dioxide in bleaching chemical cotton
     二氧化氯在精制棉漂白上的应用
短句来源
     Chemical Sensors
     化学量传感器
短句来源
     chemical graphics;
     化学图形学;
短句来源
     Cotton Beach
     科顿海滩
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When the chlorine dioxide is used in the bleaching technology,the best chemical cotton is produced, with its viscosity over 1 000 mPa s and the whiteness over 87%.It is for the first time in China that chlorine dioxide is used in bleaching chemical cotton.

国产精制棉采用二氧化氯漂白工艺,粘度可超过1000mPa·s,白度可达特级水平,创出国内一流的优质精制棉。二氧化氯应用于精制棉的漂白,国内尚属首次。

>=Field studies were carried out to evaluate the effect of two transgenic cotton varieties (SGK321 carrying Cry1A + CpTI and DP99B carrying Cry1Ac) and the conventional variety (shiyuian321-parental line of SGK321) to cotton spider mites Tetranychus spp. from 2002 to 2004. In 2002, this experiment included three treatments, Bt cotton field plot (SGK321), non-Bt cotton field (Shiyuan321) without acaricides and insecticides use throughout the season and non-Bt cotton field (Shiyuan321)...

>=Field studies were carried out to evaluate the effect of two transgenic cotton varieties (SGK321 carrying Cry1A + CpTI and DP99B carrying Cry1Ac) and the conventional variety (shiyuian321-parental line of SGK321) to cotton spider mites Tetranychus spp. from 2002 to 2004. In 2002, this experiment included three treatments, Bt cotton field plot (SGK321), non-Bt cotton field (Shiyuan321) without acaricides and insecticides use throughout the season and non-Bt cotton field (Shiyuan321) where acaricides and insecticides were used to control Tetranychus spp. There are four different types of treatments after a new transgenic Bt cotton variety, DP99B (non-chemical control) , was added in experiments in 2003-2004. The results showed that there were no significant dif- ference in densities of cotton spider mites among Bt (non-chemical) and non-Bt (non-chemical) cotton fields, nor was there a significantly different in damage parameters of cotton spider mites among these treatments. But there are significant difference ( P<0. 05) in densities and damage parameters of spider mites in cotton fields with or without chemicals. These results suggest that Bt cotton has no effect on cotton spider mites, however, cotton spider mites has potential to lead to severe damage in Bt cotton fields. Acaricides or insecticides are essential tool in controlling cotton spider mites in Northern China

2002-2004年,在冀南棉区系统调查了Bt棉品种DP99B(转Cry1Ac基因)和对棉叶螨发生的影响。2002年,试验的Bt棉品种为SGK321(转Cry1Ac+CpTl基因);非Bt棉品种为SGK321的受体棉shiyuan321。试验包括3个处理:Bt棉田(整个棉花生长季节不施用任何杀螨剂和杀虫剂);非Bt棉田(整个棉花生长季节不施用任何杀螨剂和杀虫剂);非Bt棉田(在棉花生长季节施用杀虫剂和杀螨剂防治棉叶螨)。2003.2004年,增加了一个Bt棉品种为99B(转Cry1Ac基因),试验共计4个处理,其中99B棉田在整个棉花生育期不施用任何农药。结果表明:不采用化学防治的Bt棉田和非Bt棉田中的棉叶螨密度和螨害指数均无显著差异。但经过化学防治处理的棉田,其棉叶螨密度和螨害指数显著低于未经过化学防治处理的棉田(P<0.05)。我们认为,Bt棉对棉叶螨的发生没有显著影响。然而,棉叶螨有对Bt棉田产生严重危害的可能,杀螨剂已经成为华北棉区防治棉花叶螨一件必要的工具。

 
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