Estimate on the Eco-economic Benefits of Rural Energy Sources Construction and De-farming and Reforestation

The ecological and economic benefits from using the solar stove and the methane are remarkable in the west Qinling mountain area.The quantity of heat that a farm household with 5 persons obtains from a solan stove with 1.5m~2 acreage and a methane-generating pit with 8 m~3 cubage in each year is equal to 773 kg standard coal,and equivalent to the 1353kg firewood;its net income is 268 yuan.The quantity of firewood substituted in a year is equal to the growth quantity of 0.338 hm~2 of forest land in each year,0.042275hm~2 of woodland would be escaped from being cut.The income that peasants obtain from de-farming and reforestation is 465 yuan/y on average.Beside grain production,the income from de-farming and reforestation is mainly the production cost saved when grain is no longer grown.De-farming and reforestation.taking forest increment as the aim, should be taken as a medium and long-term strategy,and brought into effect steadily.Using the solar stove and the methane,taking to protect existing forests as the goal,is a necessary means to consolidate the effect of de-farming and reforestation and ecological construction.