不同林龄抑螺防病林林分内钉螺种群分布特点的研究——以安庆市大观区沿江滩地为例

对安庆沿江滩地杨树林地、江滩草地、芦苇丛等5个植被类型区的钉螺分布状况进行了调查,研究了不同植被类型区钉螺的形态指标和阳性率。结果表明:①成熟杨树林地、中龄杨树林地均无钉螺分布;杨树幼林地、江滩草地、芦苇丛螺口密度分别为4只/0.11m2、5只/0.11m2、7只/0.11m2。②杨树幼林地、江滩草地、芦苇丛所获钉螺样本的阴阳性检测,没有被血吸虫感染,均为阴性。③江滩营造抑螺防病林是改变钉螺孳生环境及人工控制钉螺种群密度的最有效途径之一。

Characterization of the Distribution of Oncomelania hupensis in Schistosoma Prevention Forests at Different Ages

Different methods were used to investigate the distribution of Oncomelania hupensis in 5 types of vegetation,including poplar forests,meadows and reeds along the river marshlands etc.Morphological parameters and the rate of positive indication of existence of Oncomelania hupensis samples were studied,and their correlation with the control measures were analyzed.The results showed:1.There was no distribution of Oncomelania hupensis in 20-year-old and 10-year-old poplar forests.The distribution densities of Oncomelania hupensis in 3-year-old young poplar forests,river meadows and reeds were 4/0.11m 2,5/0.11m 2 and 7/0.11m 2 respectively.2.The samples of Oncomelania hupensis taken from 3-year-old young poplar forests,river meadows and reeds showed negative indication of infection by schistosoma.3.Growing schistosoma prevention forests along river marshlands is one of the most effective ways to change the breeding environment of Oncomelania hupensis and artificially control its population density.