北方农村“四位一体”能源生态模式以其显著的经济、社会、生态效益深受广大农民的欢迎，在东北地区的发展已成燎原之势．我市仅用两年时间就推广了２００多户，均取得良好效益。在推广实践中，我们感到“四位一体”虽然解决了沼气池池体越冬和冬季利用问题，但冬季受气温、尤? The “four in one” energy eco-mode in the rural areas of North China has been well received by the vast number of peasants for its remarkable economic, social and ecological benefits. Its development in northeast China has become a prairie fire. Only two years to promote the city more than 200 households, have achieved good results. In the promotion of practice, we feel that the “four in one” Although the solution to the digester pool winter and winter use of the problem, but the winter by the temperature, especially?