| 河北种植生态经济系统能值分析 |
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| 作者姓名： | 龚宇 |
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| 作者单位： | 河北省唐山市气象局 |
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| 基金项目： | 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",唐山市科技发展计划项目"农村发展保障条件科技示范"? |
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| 摘 要： | 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-1,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。
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| 关 键 词： | 种植业生态系统 能值分析 河北 |
Emergy analysis of eco-economic system of planting in Hebei province |
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| Abstract: | Abstract: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 7.97×1022sej and 3.24×1022sej 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 1.98×1011sej.yuan-1, 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. |
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| Keywords: | eco-economic system of planting emergy analysis Hebei province |
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