| 摘要: |
| [目的]揭示黄土高原沟壑区果业生态系统的自然资源特征和投入产出结构特征.[方法]于2007年一个完整的生产年,采用能值分析方法对黄土高原沟壑区延安市洛川县南安善村和咸阳市淳化县西坡村农户果业生态系统的能值投入产出进行了比较研究.[结果]南安善村和西坡村农户果业生产的能值投入结构相似,均以消耗无偿的自然资源为主;辅助能值投人中不可更新工业能值的投入比重最高,且以化肥投入为主,有机肥投人不足;南安善村和西坡村农户果业生态系统的太阳能值转化率较低,净能值产出率和投入率均较高,环境承载力较低.[结论]黄土高原沟壑区果业生态系统的自然资源利用效率不高,进一步开发的潜力很大,应适当控制化肥的投入,增加有机能值的投入,以提高系统的生态经济效益. |
| 关键词: 能值分析 农户 果业生态系统 黄土高原沟壑区 |
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| 基金项目:中国科学院知识创新项目"农果复合型生态农业建设模式示范"（kzcxl-06-06-02-03） |
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| Energy analysis of apple fruit industry ecosystem in the Loess Plateau |
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| Abstract: |
| 【Objective】 This paper was to reveal the feature of natural resources and system input and output structure about apple industry system in gully region of the Loess Plateau.【Method】 The author selected some peasant households in Xipo village and Nan’anshan village which lie in Yanan City Luochuan county and Xianyong city Chunhua county respectively in 2007.Energy analysis method was used to evaluate input and output of peasant households apple industry ecological system.【Result】 The result showed that the structure of both system energy input was similar and the investment of renewable environmental resources took a main proportion in the system.Of the total nonrenewable purchased resources,chemical fertilizers made up the largest fraction.The investment of organic manure was deficient.The energy transformity was lower net energy yield ratio and the energy input ratio of fruit industry was higher,the environmental loading ratio was not high in Nan'anshan and Beigou peasant household apple industry ecological system.【Conclusion】 So the utilization efficiency of renewable natural resources was lower.The natural resource had a very big potential to exploit.The input of chemical fertilizer should be controlled and the organic fertilizer should be raised to improve the system ecological economic benefit. |
| Key words: energy analysis household fruit industry eco system the Loess Plateau |
