摘要
为研究江南常见植物凋落物在不同季节在景观水体中的分解对水体本身的影响,在实验室内模拟了柳树(Salix)、香樟树(Cinnamomum)和金丝桃(Hypericum)凋落物在水体中的分解过程,研究了不同温度不同种类植物凋落物的分解程度、分解速度及其对上覆水中总氮、总磷的影响。结果表明:植物凋落物在15℃的分解速度最快和分解程度最大,此外,温暖环境相较于低温环境更加有利于植物凋落物的分解;不同凋落物在上覆水中的氮磷元素释放均呈现“释放-富集-再释放”的规律,磷元素在水中的释放快于氮元素,仅仅1周就可以释放达到峰值;柳叶凋落物因其质地软、角质层薄,在该文及其他研究中均展现了快速释放氮磷元素的特性。
To investigate the impact of litter decomposition from common plants in the Jiangnan region on nearby landscape aquatic ecosystems throughout various seasons,the decomposition process of litter from three prevalent species including salix,cinnamomum and hypericum is simulated in laboratory,and the degree and rate of plant litter decomposition under varying temperature conditions,their effects on the levels of total nitrogen and total phosphorus in the overlying water are also examined.The findings show that the highest rates of litter decomposition and degree of decomposition occur at a temperature of 15°C;a warmer environment significantly promotes litter decomposition compared to lower temperature settings;the release of both nitrogen and phosphorus into the overlying water from different litter types follows a distinctive release-accumulation-re-release pattern.It is important to note that the release of phosphorus exceeds that of nitrogen,with peak phosphorus release occurring within just one week.The characteristic soft texture and thin cuticle of the Salix leaf litter present the rapid release of nitrogen and phosphorus,a phenomenon consistent with findings in this paper and other previous studies.This research will shed light on the intricate dynamics of litter decomposition from common Jiangnan plants and its substantial implications for nearby water bodies,especially in the context of seasonal variations.
作者
秦天羽
李勇
李祎頔
QIN Tianyu;LI Yong;LI Yidi(School of Environmental Science and Engineering,SUST,Suzhou 215009,China)
出处
《苏州科技大学学报（工程技术版）》
CAS
2024年第2期48-55,共8页
Journal of Suzhou University of Science and Technology（Engineering and Technology Edition）
关键词
植物凋落物
分解
景观水体
plant litter
decomposition
landscape water
