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经调查统计得出 :( 1 )长江外滩枫杨林钉螺密度 (每 0 .1 1m2 内个数 )与意杨林、旱柳林和芦苇林的差值置信区间分别为 8.2 80 9～ 1 8.2 3 0 9、-0 .762 2～ 1 .64 62和 5.3 1 90～ 1 3 .3 80 9;( 2 )枫杨林群落生态因子与钉螺的相关性表现为 ,最适宜于钉螺孳生的光照为 5× 1 0 0～1 5× 1 0 0lx、土壤湿度为 2 0 %～ 4 0 %、林底植被盖度为 4 0 %～ 70 % ;( 3 )室内对照实验显示 ,枫杨鲜叶 0 .5%浓度水浸液灭螺效果在 6d后为 84 % ,优于同浓度凋落物的灭螺效果 4 2 .7% .上述研究结果为改善群落结构 ,提高枫杨林灭螺效果 ,提供了参考依据
The survey statistics show that: (1) The confidence interval of the difference between the density of Oncomelania hupensis population (every 0.1m2) in Populus euphratica forest of the Yangtze River and those of Populus euphratica, Salix matsutake and Reed forest is 8.2 80 9 ~ 1 8.2 3 0 9, -0. 762 2 ~ 1 .64 62 and 5.3 1 90 ~ 1 3 .3 80 9; (2) The correlation between the ecological factors and Snails in P. xylostella community was the most suitable for the light of snail breeding The soil moisture was 20% ~ 40%, and the vegetation cover in the forest floor was 40% ~ 70%. (3) The indoor control experiment showed that the fresh leaves of Pterocarya stenoptera L. were 0. The result of snail-killing effect of 5% concentration water immersion was 84% after 6 days, which was better than that of the same concentration of litter.42.7%. The results of the above study are to improve the community structure and improve the snail-killing effect Reference