甘肃省土壤盐渍化及其对生态环境的损害评估

介绍了甘肃省土壤盐渍化的状况，分析了引起土壤盐渍化的因素，并进行了土壤盐渍化对生态环境损害的经济评估，甘肃省的盐渍化土壤主要分布在河西走廊，其中以酒泉地区，张掖地区和武威地区最为严重。盐渍化土壤类型主要为典型盐土、沼泽盐土、碱化盐土和干旱盐土。导致盐渍化的因素有气候、地形、水文地质、土壤质地等自然因素，以及灌溉方式和耦作制度等人为因素。全省重度盐渍化土壤对生态环境损害造成的经济损失至少达140亿元（1996年币值）。由于种种原因，有关盐渍化对土壤生态环境服务功能的损害，目前还没有进行经济评估，但这方面的工作应该予以考虑。

Soil salinization in Gansu Province and its economic loss evaluation of eco-environmental damages

Salinized soil in Gansu Province is mainly distributed in Hexi Corridor besides a few in Lanzhou City and Baiyin City. There are four soil types in the area: typical saline soil, swamp saline soil, alkaline saline. soil and arid saline soil. The factors causing soil salinization include natural factors such as climate, hydrological and geological conditions, and human-made factors, such as irrigation patterns and cultivating system. The severe salinization has resulted in the economic loss about 14 billion Yuan RMB(price in 1996). The damage of soil salinization to service function of soil eco-environment is severe but its economic loss is not assessed yet. The work on this aspect should be considered.