摘要
选择华北平原盐渍土区作为研究对象 ,通过调查分析建立了该区耕地质量指标 ,它们是土壤水溶盐含量、有机质含量、土壤重金属容量空间、地下水资源的量与质 ;应用这些评价指标对典型样区的土地利用管理进行了可持续性评价。结果是 :近 2 0年来 ,耕地质量和生产力明显提高 ;排水与灌溉系统的建设使农田的抗旱防涝能力大大增强 ,农业生产的稳定性得到提高 ;土壤重金属虽有增加 ,但还未超过限制性标准 ;地下水位不断降低 ,水资源逐渐耗竭。虽然在短期内还不是制约因素 ,但从长远看 ,地下水资源将是可持续发展的最大隐患。总体上看 。
Salt content, organic matter content, heavy metals and ground water resource were selected as farmland quality indicators for evaluating sustainable land management in saline soil area of the North China Plain. The results suggested that in the area of saline soil, the salt content of soils were decreased after 19 year's reclamation, the productivity has been raised, agricultural production has been kept stable due to the construction of irrigating and draining system. Generally speaking, the land management is sustainable. But the shortage of fresh water resource will be the most chalenging factor for sustainable development.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2001年第5期42-48,共7页
Journal of China Agricultural University
基金
国家重点基础研究发展规划项目 (G19990 11810 )
国家自然科学基金项目 (4 98710 0 5 )
国土资点科技项目 (2 0 0 0 2 0 9)
