自然免耕下的稻田生态系统

自然免耕是一种新型的稻田耕作法，通过人为改变地表微地形，建立了一个适合水旱作物复种轮作，鱼、萍、鸭周年共生的稻田生态系统．自然免耕促进了土壤内、外环境的物质、能量和信息交换，水、热、气、肥谐调．并通过环境网络效应，强化了环境与生物区系间的缓冲－调节力．提高了土壤自调能力和土壤有序度．

Paddy field ecosystem under natural zero-tillage

Natural zero-tillage is a new tillage method for paddy field, through which, the microrelief of earth surface can be varied artificially, and a paddy field ecosystem adaptive to the multiple cropping and rotation of lowland and upland crops and characterized by the yearround symbiosis of fish, duckweeds and ducks can be established. This method can promote the exchange of matter. energy and information between inner and outer soil environment, harmonize water, heat, gas and nutrient. and through the effect of environment networks, intensify the buffering--regulating capacity between environment and organisms and promote the self-regulation capacity and ordered degree of soil.