摘要
为研究不同凋落叶在水体的分解特征及其对水质的影响,选用二球悬铃木(Platanus acerifolia)、垂柳(Salix babylonica)和毛泡桐(Paulownia tomentosa)凋落叶为实验材料,模拟3种落叶在小型水体中的分解过程,测定水体高锰酸盐(CODMn)指数的变化.结果表明,3种落叶的分解使水体CODMn指数在1天内显著升高,尤以垂柳水体升高最为显著.二球悬铃木和垂柳落叶水体中CODMn指数的变化基本一致,呈上升—下降—上升的趋势,但CODMn指数达峰值时间不同,二球悬铃木为第15天,垂柳为第8天.毛泡桐凋落叶水体CODMn指数的变化为上升—下降—平稳,CODMn指数第4天最高.整体上,3种落叶分解过程中还原性无机物和可被氧化的有机物含量呈释放状态,但释放量不同,垂柳最高,二球悬铃木其次,毛泡桐最低.
To study decomposition characteristics of different leaf litters and its effects on water quality,foliar litters of Platanus acerifolia,Salix babylonica and Paulownia tomentosa were selected as the experimental materials,decomposition course in the small scale water body were simulated in the lab,and the variation of permanganate index(COD Mn)were measured.The results showed that COD Mn increased significantly during 1 day,COD Mn in the water of Salix babylonica leaf was maximal.The variation of COD Mn in water of Platanus acerifolia and Salix babylonica foliar litters was similar showing an up,down,then up tendency,but COD Mn peaked at 15th day for Platanus acerifolia and at 8th day for Salix babylonica respectively.While COD Mn in water of Paulownia tomentosa leaf exhibited an up,down,then fluctuation in a stable range trend,COD Mn was the highest at 4th day.As a whole,the reductive inorganic substances and oxidizable organic substances were released during the decomposition of three foliar leaves,but release quantity varied,those of Salix babylonica leaf litter was maximal,then Platanus acerifolia,and Paulownia tomentosa was the minimum.
作者
李艳晖
王瑜
刘丹
王摇
孙佳娟
李砧
LI Yanhui;WANG Yu;LIU Dan;WANG Yao;SUN Jiajuan;LI Zhen(College of Biological Sciences and Technology,Taiyuan Normal University,Shanxi Jinzhong 030619,China)
出处
《太原师范学院学报（自然科学版）》
2023年第2期64-68,共5页
Journal of Taiyuan Normal University:Natural Science Edition
基金
国家自然科学基金项目(51709197)
山西省大学生创新创业训练项目(2019500)。
关键词
凋落叶
分解特征
还原性物质
高锰酸盐指数
水质
leaf litter
decomposition characteristics
reductive substances
permanganate index
water quality
