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盐碱化、沙漠化和水土流失是严重威胁世界农业可持续发展的3大土地问题。含盐量过高将对土壤物理结构、化学性质、生物过程以及作物生长等方面造成负面影响。滨海盐碱地主要分布于环渤海地区与黄海沿岸,其中,黄河三角洲与长江三角洲受海水入侵影响严重,因二者本身处于河流冲积平原区,故盐碱地特征更为典型,具有区域代表性。该技术主要针对重度盐碱地选择示范区进行整治,通过借鉴国内外盐碱地生态工程相关理论,以生态整治为中心,遵循生态效益与循环经济优先的原则,针对重度盐碱地,实施整治工程,并进行生态化改良。
Salinization, desertification and soil erosion are the three major land problems that threaten the sustainable development of world agriculture. Salinity is too high will have a negative impact on soil physical structure, chemical properties, biological processes and crop growth. The coastal saline-alkali lands are mainly distributed in the Bohai Rim and the Yellow Sea coast. Among them, the Yellow River Delta and the Yangtze River Delta are seriously affected by sea-water intrusion. Both of them are in the alluvial plain of rivers, so the characteristics of saline-alkali land are more typical and have regional representation. The technology mainly aims at remediation of severe saline-alkali land selection demonstration area. Based on the theory of ecological engineering of saline-alkali land both at home and abroad, the technology is centered on ecological remediation and follows the principle of giving priority to ecological benefits and circular economy. Improved.