土地整理工程对汛期江滩钉螺滞留的影响

Effect of land consolidation project on detention of Oncomelania hupensis snails in flood at Yangtze River beach

目的探讨江滩土地整理工程对汛期钉螺滞留的影响。方法 2011年采用移除野柳林、削高填低、提升坡度等方法对江滩土地进行整理,2012年调查对比整理前、后汛期末江滩钉螺情况。结果 2010年汛期末有螺框出现率为96.5%,钉螺密度为3.655只/0.1 m2;2012年汛期末有螺框出现率为2.0%,钉螺密度为0.015只/0.1 m2;整理前、后有螺框出现率差异有统计学意义(χ2=357.29,P<0.01)。结论土地整理工程对抑制汛期江滩钉螺滞留具有明显作用。

Objective To explore the effect of land consolidation project on the detention of Oncomelania hupensis snails in the flood at the Yangtze River beach. Methods The land consolidation project including removing wild willow groves, cutting the high and filling the low, and improving the slope was carried out at the Yangtze River beach in 2011, and the status of snails was investigated before and after the project, respectively, at the end of the flood season. Results Before the project （2010）, at the end of the flood season, the rate of the frames with snails was 96.5% and the snail density was 3.655/0.1m2. After the project （2012）, at the end of the flood season in the same area, the rate of the frames with snails was 2.0% and the snail density was 0.015/0.1m2 （ X2 = 357.29, P 〈 0.01）. Conclusion The land consolidation has a significant effect on the detention of snails in the flood at the Yangtze River beach.