摘要
农业生态系统是为了满足人类对各种农产品的需要而在天然生态系统的基础上建立起来的一类人工生态系统。为使系统在良性循环的基础上为人类提供更多更好的农产品,有必要去分析和掌握它的特殊性。农业生态系统有四个突出特点,显然有别于一般天然生态系统,这就是:输入输出量加大,大量的辅助能量输入,食物链趋于短缩,残遗物利用链趋于加长。
Agricultural ecosystem is a kind of man-made ecosystem, which is set up on the basis of the natural ecosystem. Its function is to meet the needs of the people for various agricultural products. In order to get more agricultural products with better quality from agricultural ecosystem on the basis of beniga cycle, it is necessary to analyse and understand its special characteristics.Agricultural ecosystem has four outstanding characteristics,which are very different from common natural ecosystems. These characteristics are the increase in the input and output of materials and energy, large input of auxiliary energy, the tendency of shortening food chains, the tendency of extending the chains of utilizing survivals.
出处
《农村生态环境》
CSCD
1990年第1期36-38,共3页
Rural Eco-Environment
