氮气
生物地球化学循环
垃圾箱
植物凋落物
营养物
农学
磷
热带和亚热带湿润阔叶林
营养循环
碳纤维
生态系统
氮气循环
亚热带
化学
环境科学
生态学
环境化学
生物
复合数
复合材料
有机化学
材料科学
作者
Yue Zhang,Shichen Xiong,Chengming You,Yang Liu,Lixia Wang,·Li Zhang,Han Li,Bo Tan,Yang Liu,Zhenfeng Xu
标识
DOI:10.1007/s11676-022-01543-9
摘要
Abstract Nitrogen deposition has a considerable impact on biogeochemical cycling in terrestrial ecosystems. However, how litter production and element return respond to N addition remains poorly understood in nitrogen-rich subtropical regions. In this study, a 4-year nitrogen addition experiment explored its effects on foliar litter production and carbon, nitrogen and phosphorus in a subtropical Michelia wilsonii forest. A clear seasonal pattern in foliar litterfall was observed, regardless of nitrogen treatments, with a peak in spring and a smaller one in autumn. Foliar litter increased with increasing nitrogen but did not affect litter carbon concentrations and often decreased nitrogen and phosphorous concentrations. The effect of nitrogen addition was dependent on time (month/year). Carbon, nitrogen and phosphorous return showed similar bimodal seasonal patterns. Nitrogen addition increased carbon and nitrogen return but did not affect phosphorous. Our results suggest that the addition of nitrogen stimulates carbon and nutrient return via litterfall.
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