辽北平原退化土地治理与可持续发展

Management of Degenerated Soil and Sustainable Development in North Plain of Liaoning Province in China

辽宁省北部的辽河平原存在着严重的土地退化现象，土壤沙化肥力下降，土壤渍涝含盐较重，草场碱化严重及水土流失加剧等自然生态失衡的不利因素，成为本区经济发展的限制因子．但是该区同时具有人均占地较多，水资源潜力较大，光热条件匹配相当以及劳动力充裕等有利条件．可持续发展的措施是：查清资源，搞好规划；兴修水利工程，完善基础设施；打井种稻，改良土壤；合理利用草场，发展节粮型的畜牧业；营造森林，防止风沙旱涝灾害，建设生态农业．

The soil in Liaohe river plain in the north of Liaoning province degenerates heavily:(1)soil becomes desert and fertility declines; (2)soil is water logged and has more salt; (3)esplanade is alkalized, so water is lost and soil is eroded. All these disadvantageous factors breaking the balance of natural ecological environment become the limiting factors to the economic development of that region. But, at the same time it area has some advantageous conditions: possessing more land per man, greater potential of water resource, light in accordanc with quantity of heat and adequate labour force. This paper proposed the following measures for sustainable development in the region:(1)making a thorough investigation of resources and planning well;(2)building irrigation works and perfecting infrastructure;(3)drilling wells and growing rice and improving soil;(4)utilizing esplanade reasonably and developing grain-saved type animal husbandry;(5)planting forest to prevent the disaster o wind, sand, drought and waterlogged in order to set up ecological agriculture.