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目的观察镇江市焦北滩翻耕种植灭螺效果,评价其费用效益。方法于2009年在焦北滩东实验区实施修筑矮围、翻耕种植(矮围垦种)灭螺,在焦北滩西对照区采用氯硝柳胺乙醇胺盐粉剂进行喷粉法灭螺,观察两组灭螺效果,并进行费用效果比较。结果实验组矮围垦种当年活螺密度下降了99.75%,第2年开始即查不到活螺;对照区实施药物灭螺后当年活螺密度下降70%左右,但次年即基本恢复。实验区单位面积净效益费用比为2.18,对照区为-0.92。结论长江中下游江滩采用修筑江滩矮围和翻耕种植的方法可有效控制钉螺,并可取得一定的经济效益。
Objective To observe the effect of snail cultivation on plowed cultivation in Jiaobei Beach, Zhenjiang City, and evaluate its cost effectiveness. Methods In 2009, Jiaozhaitan East Experimental Zone was constructed with dwarf and tillage planted (dwarf reclamation) molluscicides, and niclosamide ethanolamine salt powder was used in the control area of Jiao North Beach to kill snails. Two groups of snail effect, and cost comparison. Results In the dwarf reclamation area, the live snail density decreased by 99.75%, and the live snail was not found at the beginning of the second year. In the control area, the live snail density decreased by 70% in the year of drug snail control, but basically recovered in the following year. Experimental area per unit area net benefit cost ratio of 2.18, the control area is -0.92. Conclusion The method of constructing dwarf landforms and tillage cultivation in the middle and lower reaches of the Yangtze River can effectively control snails and achieve certain economic benefits.