大渤海区土地资源质量恶化及其生态环境效应

LAND DEGRADATION AND ITS ECO-ENVIRONMENTAL EFFECT IN THE COASTAL AREA OF BOHAI AND YELLOW SEAS

本文主要讨论大渤海区土地质量下降的形势，引起土地质量下降的因素及其所产生的生态效应。结果表明，大渤海区约３０×１０４ｋｍ２范围内，土地质量下降主要与土地盐渍化的形成和发展密切相关，而土地盐渍化与海侵密切相关以及与不合理开采地下水等因素有关。由人为和自然因素叠加引起的土地盐渍化已造成表生景观生态环境退化，农业生产力下降。

he paper mainly discusses the trend of land quality degradation in the coastal area of Bohai and Yellow seas as well as factors accountable for the degradation and resulted eco-environmental effect.Research results indicated that land degrafdation is closely related to the formation and development of soil salinizationalkalization,which is in turn closely correlated to factors like transgression and irrational excavation of ground water within an extent of about 300,000 square kilometers in the study area. Soil salinizationalkalization caused by human factors plus natural elements has led to eco-environmental degradation of superficial landscape and drop of agricultural productivity.