关键词: 采收成熟度, 采收成熟度, 烟叶质量

Abstract:

Miyun reservoir is in the North mountainous area of Miyun county.It’s coming water is becoming less from 17 hundred million m3 in fifties of 20 century to 0.7 hundred million m3 in recent 10 years. So changes of the water quality is maybe close to the nearest areas of Miyun reservoir. This article takes a key village in the North part of Miyun reservoir as a example and evaluated through emergy method. The result shows that the emergy yield ratio is 0.2,means the eco-economic mode of the village is not feasible;emergy investment ratio is 5.67,higher than the average emergy investment ratio of China(4.93), means the village is depending on outside investment, meanwhile, the envionmental loading ratio is 5.67 and emergy index of sustainablility is 1.13, which shows that the system may provide non acceptable and sustainbale economic results. Finally, on the bases of the evaluation, this article put forward ecological planning for the fufure development.