大庆市盐碱土深松改良生态修复试验研究

Analysis of Improvement and Ecology Restoration Effect for Peripheral Alkali-saline Grassland in Daqing

针对黑龙江省大庆市土壤盐碱化、草原退化、生态环境恶化日趋加重问题,利用振动深松技术对苏打盐碱土及草原进行改良。测定了改良前后土壤的物理化学指标、牧草产量及草原群落的变化,通过反映群落优势的物种多样性、丰富度、均匀度、盖度及频度等指标分析植被的变化趋势。结果表明,改良后的2～3年,土壤理化指标趋于良性变化,以人工种植羊草的群落成为优质群落,指明了振动深松技术改良苏打盐碱土的有效性及草原生态修复效果的显著性。

In view of the problem of seriously salting of soil,grassland degenerating and worsening ecological environment in Daqing of Heilongjiang Province,the technology of soil deeply vibrating-loosing was applied on improving soda alkali-saline soil and grassland.The variation of soil physical and chemical indices,the grass crop and steppe community were determined around the improvement.The changing tendency of vegetation was analysed with the indexes such as species multiplicity,abundance,uniformity,coverage and frequency which reflected dominance of vegetation community.It brought the result that the soil physicochemical indices was improved,and the manual aneurolepidium was become the high quality community in next 2 or 3 years.It proved that applying the technology of deeply vibrating-loosening to improve alkali-saline soils was effective,and prairie ecology repair effect was significance.