Study On Three-crop System Of Ecological Economics Of Rape-rice-rice In Hunan

Reasonable model is a basis for realizing vrtuous circle of ecological and agriculture sustainable development, and farmland ecological economics will establish a optimum cultivation patterns, ecological Economics is direct and concise, easy to understand the seriousness of environmental problems, from the benefits of the ecological and economic investigating the mode of agricultural production in Hunan, for future research and production making decision- reference. Hunan is a double-crop rice main producing area, "Rape-Rice-Rice" is the main farming cropping pattern, In this study, analyzing the ecological and economic benefits of "Rape-Rice-Rice" the three cropping planting patterns in Hunan, Through quantifying specifically the costs of atmosphere, soil and water environment, from an economic point of view analyzing of ecological problems, these ecological studies have not been reported in the literature, but also innovation of this article.In this paper, from ecological and economic benefits an integrated analysis is given to agricultural cultivation in rice-rice-rape producing areas of Hunan Province, The results are as follows:1,From the environmental cost analysis shows, agricultural production costs of pollution on the environment reaches as much as more than 40.4940 billion per year, and increased year by year, among them, the highest total cost of soil pollution, reach more than 31.0389 billion per year, Second, the cost of the atmospheric environment, which is 5.7288 billion per year, Environmental cost of water is minimal, which is 3.7264 million per year. As in the northern region of Hunan the oxygen efficiency of planting is greater than the cost of greenhouse gas pollution, and benefits from it, And the central, southern and eastern regions of Hunan would require that pay the economic costs of air pollution.2,In Hunan food production costs increase year by year, However, as production increased and food prices, the total revenue in the province's rice-rice-rape producing areas is increasing, And from 2006 to 2007 there was a big leap, an increase of nearly 20 billion. Trends in various cities and the province of the same, are increasing year by year, income in the north region is the highest in Hunan. Between cities, the economic benefit greater in Changde City and Yueyang City from it, Average each year revenue reaches more than 800 million yuan, Chenzhou City revenue has been ranked the end of the nine cities, yield about 200 million yuan each year.3,From the perspective of ecological economics, at Changde, Yueyang and Shaoyang of Hunan in 2005, ecological and economic benefits for the positive, and the remaining six cities is negative, And the maximum benefit is at Changde; In 2006 ecological and economic of Changsha City benefits from negative to positive, Ecological and economic benefits for the positive in four cities; In 2007 only ecological and economic benefits in Zhuzhou City is the negative, the other eight cities are all positive; In 2008, the benefits of all nine municipalities across the province is positive, comparison of ecological and economic benefits between the region shows that the Northern is the highest in the grain producing areas of Hunan, and the Southern is the lowest.