东莞市郊低洼地农业生态系统模式的研究

研究了广东省东莞市郊低洼地现存农业生态系统模式的结构和经济效益，发现该地区的主要模式有种养结合模式、养殖模式和高畦深沟连作蔬菜模式．研究结果表明，种养结合模式具有较完善的系统功能和较高的劳动日值．建议连作蔬菜模式可以根据生态工程的原理引进必要的组分如养猪和深沟养鱼等，从而改善生态系统的整体功能和获得持续效益．

Lowland agroecosystem models in Dongguan suburbs

The structure and economic effect of lowland agroecosystem models in Dongguan suburbs of Guangdong Province are studied. The major models there include integrated planting-raising model, animal rearing model, and high-bed and low-ditch vegetable growing model. The results show that integrated planting-raising model has a perfect function and a high work day value. It is suggested that according to eco-engineering principles, such essential components as fish culture and pig farming should be added to the continuous vegetable growing model to improve tEe holistic function of the ecosystem and obtain a sustainble effect.