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我省九江市小城门湖蓄水养鱼消灭钉螺效果的观察,根据调查结果分析,经年蓄水对消灭钉螺能起一定作用,蓄水13个月在用爪哇式钻头从水中取土样观察活螺平均密度为0.032只/市尺~2,钉螺死亡率为93.52%,在平均水深1.5米以上地带,均无活螺.蓄水18个月放干后复查,活螺平均密度则降低为0.001只/市尺~2,而土面和土中钉螺平均死亡率则增为97.77%,在未淹水的已开垦而荒芜的滩地活螺平均密度0.01只/市尺~2,适为淹水滩地后称平均密度0.001只/市尺~2的10倍,钉螺死亡率后者超过前者(20%)4.8倍以上.活螺分布纵深距离蓄水13个月距常年水线56米,18个月压缩在20米以内. 有螺面积从原来1,420,000米~2,缩小为蓄水后的12,000米~2,说明在湖??发展生产,筑坝蓄水养鱼,可以不必另外安排劳力和财力,即能够取得大面积的灭螺效果.
According to the analysis of the survey results, after years of water storage, it can play a role in eliminating snails and can take water for 13 months to take soil samples from water using Java-type drill bits The average density of live snails was 0.032 / sq ft and the mortality of snails was 93.52%. There was no snail in the zone with the average water depth of 1.5m. The average density of live snails was reduced after being stored for 18 months The average death rate of Oncomelania snails in soil and soil was increased to 97.77%. The average density of live snails in untreated and deserted beaches was only 0.01 / The average density of flooding beaches was 10 times of the average density of 0.001 per square meter ~ 2, and the mortality rate of snails was more than 4.8 times that of the former (20%). The live snails distributed water depth of 13 months away from the perennial waterline of 56 meters, 18 months compressed within 20 meters. Looping area from the original 1,420,000 m ~ 2, reduced to 12,000 m ~ 2 after water storage, indicating that the development of production in the lake, dam aquifers, you can not have to arrange additional labor And financial resources, that is able to obtain a large area of the snail effect.