Abstract:

Objective To evaluate the effect of agroforestry models on the inhibition of Oncomelania snails in the plateau mountainous area of Yunnan Province. Methods The experimental field was established at Sanying Village of Eryuan County， Yunnan Province，where the“Flourishing Forest and Controlling Snails Project”was implemented. Different drought crops（alfalfa，vegetables，broad bean，garlic，lettuce，celery，green onions，and wheat）were intercropped under walnut forest in experimental groups，and the crops were not intercropped under walnut forest in a control group. The growth of forest，the change of snails and short.term income of residents were investigated. Results Agroforestry models promoted the forestry growth and effectively inhibited the growth of snails. There was a little snail in one of the experimental group that forest was intercropped with alfalfa（the occurrence rate of frames with living snails was 3.33%，the average density of living snails was 0.004/0.1 m2，and the declining rates were both 50.00%）. The snails were not found in other intercropped models. The income of residents in the experimental groups increased（900-6 800 Yuan per year）compared with that in the control group. Conclusion The model of walnut forest intercropped with crops not only has the obvious effect on inhibition of snails，but also has good economic and ecological benefits in the plateau mountainous area of Yunnan Province.

Key words: Oncomelania hupensis；Plateau mountainous area；Forest of inhibition of snails；Agroforestry；Yunnan Province

摘要：

目的评价云南省高原山区抑螺防病林农林复合模式的综合效果。方法选择云南省洱源县“兴林抑螺综合试验示范区”三营自然村，在核桃抑螺防病林设林下间种苜蓿、青菜、蚕豆、大蒜、莴苣、芹菜、大葱、小麦各实验组，无间种为对照组。监测各组林分生长、钉螺变化情况，调查农户短期经济收入，分析综合效益。结果抑螺防病林进行农林复合后，林分生长好于单一林分；林下间作苜蓿组活螺框出现率为3.33%，活螺密度0.04只/0.1 m2，两者下降率均为50.00%，其他各组未查到钉螺；实验组与对照比较，可使农民增收900～6 800元（/ 667 m2.年）。结论云南高原山区核桃抑螺防病林下间作具有明显的抑螺效果，可产生良好的经济和生态效益。

关键词: 钉螺；高原山区；抑螺防病林；农林复合；云南省