黄土高原家庭农业生态系统的能量流特征  

Energy Flow Characteristics of Household Agri-Ecosystem on Loess Plateau

作　　者：李俊年[1] 杨冬梅[1] 陶双伦[1] 刘志霄[1] 张佑祥[1] 

机构地区：[1]吉首大学生物资源与环境科学学院,湖南吉首416000

出　　处：《吉首大学学报（自然科学版）》2003年第3期78-82,共5页Journal of Jishou University(Natural Sciences Edition)

基　　金：甘肃省教育厅基金资助项目(GK960-2-25A)

摘　　要：以能量生态学为基础,分析了黄土高原19个家庭农业生态系统的能量流特征.研究结果表明:农牧型、农林型、农副型、综合型家庭农业生态系统能量流可分为系统外输入能量、系统内子系统之间流动的生物能、输出到系统外的生物能;农牧型、农林型、农副型、综合型家庭农业生态系统农田子系统无机能投入具有较高水平,带有石油农业特征;畜禽子系统的饲料能决定畜禽子系统投入能量的水平.The characteristics of energy flow 19 household agri-ecosystems were analyzed based on energy ecology.The result indicated that the energy flow of agri-livestock type,agri-forest type,comprehensive type and agri-sideline type could be divided into energy input from outside system,bio-energy flow among subsystems and the bio-energy output from the system.The four types of farmland subsystem,with petrol-agriculture characters,input high inorganic energy.The level of energy input in animal husbandry subsystem was determined by the food energy.

关 键 词：黄土高原 家庭农业生态系统 能量流 能量生态学 生物能 能量转化 物质循环 

分 类 号：S181[农业科学—农业基础科学]