摘要
探究不同土地利用类型土壤质量的变化情况对实施生态恢复和生态建设具有重要意义。为了解吉林龙湾国家自然保护区内不同土地利用类型的土壤质量情况,以区域内典型的天然次生林、人工林、荒地和农田4种土地利用类型的土壤为研究对象,通过主成分分析法(PCA)和土壤质量综合指数法(SQI)计算和评价了4种土地类型土壤质量状况。结果表明,该研究区域土壤质量为3级地力,7月SQI处于0.416~0.489,9月为0.438~0.502;相较于天然次生林,农田SQI最高,荒地与人工林SQI有所下降;随着时间的变化,4种土地利用类型的SQI均有升高趋势;农田土壤质量相对指数最高,荒地最低;随着时间变化,荒地和农田土壤质量相对指数有下降趋势,土壤退化程度加深,人工林土壤质量相对指数则有升高趋势,土壤质量有所恢复。本研究可为当地进一步实施土壤生态恢复和保护提供参考。
It is of great significance to explore the changes of soil quality of different land use types for ecological restoration and ecological construction.In order to understand the soil quality of different land use types in Jilin Longwan National Nature Reserve,the soil of four land use types in this Longwan Nature Reserve,namely natural secondary forest,plantation,wasteland and farmland,were taken as the research object,and were evaluated using principal component analysis and soil quality comprehensive index(SQI).The results showed that the soil quality in the study area was graded 3.SQI ranged from 0.416 to 0.489 in July and from 0.438 to 0.502 in September.Compared with the natural secondary forest,the SQI of farmland was the highest,while the SQI of wasteland and plantation decreased.With the passage of time,the SQIs of four land use types tend to increase.Farmland soil relative quality index is the highest,while that of wasteland is the lowest.Over time,wasteland and farmland soil relative quality index tends to decline,soil degradation degree deepens,but plantation soil relative quality index tends to rise,and soil quality recovers to some extent.This study can provide references for the further implementation of soil ecological restoration and protection.
作者
王磊
李悦
王雪
WANG Lei;LI Yue;WANG Xue(State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration,School of Environment,Northeast Normal University,Changchun 130117,China)
出处
《环境生态学》
2022年第10期14-20,共7页
Environmental Ecology
基金
国家自然科学基金(U19A2042、41901116)资助。
