关键词: 生态通道模型, 营养动力学模式, 渤海生态系统, 生物资源评估

Abstract: Three types of ecological agriculture have been identified in many year's of practice: (1) Space-structural type;(2)Circulatory-use type; (3) Integral-use type. Favourable conditions exist for developing the space ecological agriculture in China. Ecological agriculture possesses many good qualities:high efficiency and low cost, harmless and poisonless, high and stable yielding and good circling.

Key words: Ecopath model, Trophic dynamics modeling, Bohai Sea ecosystem, Stock assessment