论文部分内容阅读
目的 探索耕牛轮牧对控制草洲感染性钉螺的效果。方法 选择鄱阳湖中、重度疫区进贤县的军山湖乡为实验区 ,将该乡草洲划分为耕牛放牧区和禁牧区 ,每隔 1年两区轮换 ,耕牛进入放牧区前普治 1次。同时 ,选择三里乡丰富行政村为对照区 ,耕牛敞放于草洲 ,每年普治 1次。结果 实施安全轮牧的 9块有螺草洲中 ,试前 3块无感染螺 ,试后连续 2年亦未发现感染螺 ;试前 6块有感染螺的草洲 ,试后 2年 4块草洲感染性钉螺逐年下降到 0 ,另外 2块距村较近的草洲仍有感染螺 ,感染螺草洲面积下降了 84.90 % ,耕牛感染率亦下降 81.11%。对照区 6块草洲 ,试后 2年感染螺面积下降 2 0 .83% ,感染螺面积占有螺草洲面积的 71.6 0 % ,耕牛感染率下降不显著。结论 草洲耕牛实施轮牧能有效地控制感染性钉螺密度 ,但离村较近草洲耕牛难以实施禁牧 ,感染螺密度得不到有效的控制。
Objective To explore the effect of cattle rotation on the control of Incontinen Incontinence. Methods The Junshan Lake Township in Jinxian County of Poyang Lake was selected as the experimental area. The suburb Caozhu was divided into the cattle grazing area and the no-grazing area. Every two years, the two districts rotated and the cattle entered the grazing area Purcell 1 times. At the same time, we chose Sanli Township, an abundant administrative village as a reference area. Cattle cattle were released from Caozhou and were treated once a year. RESULTS: Of the 9 snails with safety rotations, no snails were found in the first 3 snails before the trial and no snails were detected for 2 consecutive years after the trial. Six snails were infected with snails before the trial and 4 snails were found after 2 years of trial Infectious snail decreased year by year to 0, while the other two villages near the village still infected with snails, infected snails Island area decreased by 84.90%, cattle infection rate also dropped 81.11%. In the control area, there were 6 grasslands in the control group, the area of infected snails decreased 20.83% after 2 years of trial, 71.6% of infected snails occupied area, and the infection rate of cattle was not significantly decreased. Conclusion The grazing rotation of grassland cattle can effectively control the density of infective snails. However, it is difficult to implement grazing prohibition in Caozhou cattle far away from the village, and the infection density can not be effectively controlled.