退耕还林工程实施后陕北安塞县商品型生态农业建设的阶段性分析

依据耦合协调度判定标准,结合相关理论研究,分析了安塞县商品型生态农业3个阶段与农业生态-经济系统和产业-资源子系统耦合协调度值的对应关系。结果表明,随着退耕还林工程的实施,安塞县商品型生态农业建设成效显著,系统综合发展指数由1999年的0.275 2增长到2010年的0.719 5;农业生态-经济和产业-资源系统的耦合协调度经历了先下降(1999-2001年)后增长(2002-2010年)的发展过程,但是,农业产业-资源子系统的耦合协调关系明显滞后于农业生态-经济系统;相应地,安塞县商品型生态农业建设先后经历了第Ⅰ阶段的生态系统结构建造时期和农业产业结构调整时期,并于2010年开始向第Ⅱ阶段(完善农业系统循环阶段)过渡。生态系统的改善和农业产业结构的调整促进了农业经济的快速增长,但是,相关产业的发展并未合理有效地利用农业生态资源。因此,应合理调整农业产业结构,完善系统链网结构,改变农业产业与资源的局部相悖态势,促进商品型生态农业系统的快速发展。

Phase Analysis of Constructing Commodity-oriented Eco-agriculture After Grain for Green Project in Ansai County of North Shaanxi Provinc

According to the measurement standard of coupling coordination degree and related research,it is clear that there were three phases in constructing the commodity-oriented eco-agriculture in Ansai County of North Shaanxi Province,which had the corresponding relation with coupling coordination degree of agricultural eco-economic system and industry-resource system.Since the implementation of grain for green project, great progress had been made in the construction of commodity-oriented eco-agriculture in Ansai County. The comprehensive development index of agriculture system rose from 0.275 2in 1999to 0.719 5in 2010 with coupling coordination degree of agricultural eco-economic system and industry-resources system decreased first(1999-2001)and then increased later(2002-2010).However,the development of coupling coordination relationship within the industry-resources system lagged far behind that within the agricultural eco-economic system.Correspondingly,the commodity oriented eco-agriculture in Ansai County had gone through two phases as well.The first phase included the ecosystem construction period and agro-industrial structure adjustment period,and the second phase was the agriculture system improvement period started in 2010.The improvement of eco-system and adjustment of agro-industrial structure advanced the growth of agricultural economy,however,the agro-ecological resources had not been reasonably and effectively utilized. Therefore,it is important to adjust agro-industrial structure and improve the chain network in order to change the contradictory situation between agro-industries and resources utilization and promote the development of the commodity oriented eco-agriculture.