【摘要】 通过对徐淮黄泛平原地区农田生态系统演变及平衡现状的典型研究,证明治水是克服该地区旱涝盐碱灾害和迅速发展农业生产的关键措施。但是,治水必须灌排兼顾。重灌轻排,则不利于生态系统的改善。近年来,该地区粮食产量虽然仍有所增长,但物质和能量的转换效率却显著降低。为了有效地防治旱涝盐碱灾害,进一步提高生态系统的功能,在治理上,目前应侧重于改善灌排条件,特别是排水条件,改善肥料结构和合理轮作布局。为了做到因地制宜,按区域条件的差异划分为7个治理区,21个亚区。更多还原

【Abstract】 Based on investigation of development and balance of farmland ecosystem in alluvial plain of Xuzhou and Huaiyin region, it has been proved that water regulation and management is one of the key measures to control drought, waterlogging, salinization and alkalization of soil and promote agriculture production. But it is obviously that irrigation should be combined with drainage during the processes of regulation and management of water. The ecosystem will be not improved if attention is only paid on irrigation without drainage. Recently, though grain yield of this region still increases, conversion efficiency between matter and energy has been decreased markedly.In order to prevent and control the disasters and to improve ecosystem in the region, attention should be paid on improvement of both irrigation and drainage conditions, especially the latter. In addition, reasonable fertilization and cropping system should be adopted according the local conditions. For the purpose of improvement, this region is divided into seven regions and twenty subregions on the basis of the soil characteristics of ecological environment.更多还原