毛乌素沙地典型县域农业生态系统耦合生产力的演变规律——以榆阳区为例  

Evolution pattern of the coupling productivities in agro-ecosystems of typical counties in Mu Us Sandy Land——A case study of Yuyang District

作　　者：亢福仁[1] 朱铭强[1,2] 胡兵辉[2] 尚爱军[1] 卜耀军[1] 

机构地区：[1]榆林学院生命科学学院,陕西榆林719000 [2]西北农林科技大学林学院,陕西杨凌712100

出　　处：《干旱地区农业研究》2010年第1期180-186,共7页Agricultural Research in the Arid Areas

基　　金：高等学校科技创新工程重大项目培育资金项目(706054);香港何崇鋈教育基金项目(06HX01)

摘　　要：针对毛乌素沙地脆弱农业生态系统生产力的实际,选择毛乌素沙地典型县域榆阳区为研究对象,根据复合生态系统耦合理论,借助能值理论及分析方法,分析其典型区域初级生产力、次级生产力和农牧系统耦合度的演变规律。得出毛乌素沙地农业生态系统典型县域农牧耦合度的演变可划分为三个阶段:互补增效阶段、联动增殖阶段、平衡稳定阶段;榆阳区在1995年之前处于互补增效阶段,1995至2005年之间处于联动增殖阶段,2005年以后处于平衡稳定阶段。提出毛乌素沙地典型县域农业生态系统耦合的概念以及农业生态系统进化和生产潜力的解放,资源得到优化配置的方法与对策。According to the actual productivities of fragile agro-ecosystems in Mu Us Sandy Land and with Yuyang District, a typical county there, as its subject, the study investigated the evolution pattern in the primary productivity, secondary productivity and the coupling degree between farming and animal-raising in typical regions of Mu Us, following the coupling theory about compound ecosystem and the energy theory and using relevant analytical methods. To draw a conclusion in agro-ecosystems coupling degree between farming and animal-raising, three phases were divided in the typical regions of Mu Us： the complementary and synergistic phase, the interaction and proliferation phase, and the equilibrium and stabilization phase. In Yuyang, it lied in complementary and synergistic phase before 1995, in the interaction and proliferation phase during 1995 to 2005, and in the equilibrium and stabilization phase after 2005. It put forward the coupling concept of agro-ecosystems, methods and countermeasures to promote the evolution and productivity of their agro-ecosystems and to optimize the arrangement of their resources in typical regions of Mu Us.

关 键 词：毛乌素沙地 农业生态系统 耦合生产力 协调发展 

分 类 号：S181[农业科学—农业基础科学]