摘要
以向海国家级自然保护区中的已经人工恢复1~6 a的退化芦苇(Phragmites australis)沼泽的土壤质量为研究对象,采用主成分分析方法,筛选出土壤容重、pH、含水量、电导率、含盐量、有机质含量、全氮含量和全磷含量共8项理化指标;利用8项指标的数据,计算出已经恢复1~6 a的退化芦苇沼泽土壤质量的综合得分,评价恢复时间不同的退化芦苇沼泽土壤的质量。研究结果表明,随着恢复时间的增加,退化芦苇沼泽0~40 cm深度土壤的各项理化指标值发生明显变化,土壤有机质和全氮含量逐渐增大,pH和容重逐渐减小,含盐量总体呈减小趋势;8项土壤理化指标的两个主成分的方差累积解释率为94.478%,土壤有机质含量、全氮含量、容重、含盐量和pH是影响恢复芦苇沼泽土壤质量的主要因素;从0~40 cm深度土壤8项理化指标的平均值和土壤质量综合得分值看,恢复了6 a的退化芦苇沼泽的土壤质量已经与天然芦苇沼泽的土壤质量非常接近。
The soil quality of degraded reed(Phragmites australis)marshes in Xianghai National Nature Reserve that had been restored artificially for 1 year to 6 years was evaluated by 8 physicochemical indexes of the soil,including bulk weight,pH,water content,electrical conductivity,organic matter content,total nitrogen content and total phosphorus content selected by the method of principal component analysis.The results showed that with the increase of restoration time,the physicochemical indexes of the soil at 0-40 cm depth of degraded reed marshes changed significantly,the contents of organic matter and total nitrogen in the soil gradually increased,soil pH and bulk weight gradually decreased,and salt concentration generally showed a decreasing trend;the cumulative explanatory rate of the variance of 8 physicochemical indicators of the soil was 94.478%,of which organic matter content,total nitrogen content,bulk weight,salt concentration,and pH of the soil were the main factors affecting the soil quality of the restored reed marshes.From the mean value of 8 physicochemical indicators of the soil at the depth of 0-40 cm and the combined score of soil quality,the soil quality of the degraded reed marsh restored for 6 years had already been very close to that of the natural reed marsh.
作者
赵月兰
李琳
刘吉平
赵丹丹
ZHAO Yuelan;LI Lin;LIU Jiping;ZHAO Dandan(College of Geosciences and Tourism,Jilin Normal University,Siping 136000,Jilin,P.R.China)
出处
《湿地科学》
CSCD
北大核心
2023年第4期614-618,共5页
Wetland Science
基金
吉林省科学技术厅项目(20230508029RC、YDZJ202201ZYTS474和20210509028RQ)
中央财政林业科技推广示范资助项目(吉推[2014]16号)资助。
关键词
芦苇沼泽
退化
土壤质量
人工恢复
reed marsh
degeneration
soil quality
artificial recovery