河北种植生态经济系统能值分析  

Emergy Analysis of Eco-economic System of Planting in Hebei Province

作　　者：龚宇[1] 花家嘉 高桂芹[1] 王璞[2] 

机构地区：[1]唐山市气象局,河北唐山063000 [2]中国农业大学农学系,北京100094

出　　处：《中国农学通报》2009年第15期200-205,共6页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金"华北平原夏玉米季不同类型氮肥损失途径与高效利"(30571089);唐山市科技发展计划项目"农村发展保障条件科技示范"(08120205A-1)资助

摘　　要：运用能值分析方法对2007年河北省种植业生态经济系统中的投入和产出状况进行了系统分析。结果表明:总能值投入为7.97×1022sej,作物能值总产出为3.24×1022sej;不可更新工业辅助能占总能值投入的52.9%,可更新能值投入占总能值投入的比例为47.1%(可更新环境资源占20.9%、可更新有机能占26.1%),系统能值货币比率为1.98×1011sej/元,净能值产出率为0.51,环境负荷率为1.13,系统可持续发展指数为0.45,种植业生态经济系统整体的回报率较低;主要作物的能值产出依次为:玉米>小麦>蔬菜>高粱>豆类>花生。The analysis of emergy input and output of eco-economic system of planting in Hebei province in 2007 was conducted by using emergy analysis method. It showed that, the total emergy input and output of planting were 7.97×10^22sej and 3.24×10^22sej respectively. Of the total emergy input, unrenewable industrial emergy was 52.9%, and renewable emergy was 47.1% which including 20.9% of renewable environment resource and 26.1% of renewable organic emergy. The ratio of emergy and money, net emergy ratio, load ratio of environment, and sustainable development index were 1.98×10^11sej/yuan, 0.51, 1.13, and 0.45, respectively. Return from planting was low in general, and the emergy output of the main crops was maize 〉 wheat 〉 sorghum 〉 legume 〉 peanut.

关 键 词：种植业生态系统 能值分析 河北 

分 类 号：S181[农业科学—农业基础科学]