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Influence of nitrogen additions on litter decomposition, nutrient dynamics, and enzymatic activity of two plant species in a peatland in Northeast China
Y. Y. Song, C. C. Song, J. S. Ren, W. W. Tan, S. F. Jin and L. Jiang
2018
发表期刊Science of the Total Environment
卷号625页码:640-646
其他摘要Nitrogen (N) availability affects litter decomposition and nutrient dynamics, especially in N-limited ecosystems. We investigated the response of litter decomposition to N additions in Eriophorum vaginatum and Vaccinium uliginosum peatlands. These two species dominate peatlands in Northeast China. In 2012, mesh bags containing senesced leaf litter of Eriophorum vaginatum and Vaccinium uliginosum were placed in N addition plots and sprayed monthly for two years with NH4NO3 solution at dose rates of 0, 6, 12, and 24 g N m(-2) year(-1) (CK, N1, N2 and N3, respectively). Mass loss, N and phosphorus (P) content, and enzymatic activity were measured over time as litter decomposed. In the control plots, V. uliginosum litter decomposed faster than E. vaginatum litter. N1, N2, and N3 treatments increased the mass losses of V. uliginosum litter by 6%, 9%, and 4% respectively, when compared with control. No significant influence of N additions was found on the decomposition of E. vaginatum litter. However, N and P content in E. vaginatum litter and V. uliginosum litter significantly increased with N additions. Moreover, N additions significantly promoted invertase and beta-glucosidase activity in E. vaginatum and V. uliginosum litter. However, only in V. uliginosum litter was polyphenol oxidase activity significantly enhanced. Our results showed that initial litter quality and polyphenol oxidase activity influence the response of plant litter to N additions in peatland ecosystems. Increased N availability may change peatland soil N and P cycling by enhancing N and P immobilization during litter decomposition. (C) 2018 Elsevier B.V. All rights reserved.
文献类型期刊论文
条目标识符http://ir.iga.ac.cn/handle/131322/9194
专题湿地生态系统管理学科组
推荐引用方式
GB/T 7714
Y. Y. Song, C. C. Song, J. S. Ren, W. W. Tan, S. F. Jin and L. Jiang. Influence of nitrogen additions on litter decomposition, nutrient dynamics, and enzymatic activity of two plant species in a peatland in Northeast China[J]. Science of the Total Environment,2018,625:640-646.
APA Y. Y. Song, C. C. Song, J. S. Ren, W. W. Tan, S. F. Jin and L. Jiang.(2018).Influence of nitrogen additions on litter decomposition, nutrient dynamics, and enzymatic activity of two plant species in a peatland in Northeast China.Science of the Total Environment,625,640-646.
MLA Y. Y. Song, C. C. Song, J. S. Ren, W. W. Tan, S. F. Jin and L. Jiang."Influence of nitrogen additions on litter decomposition, nutrient dynamics, and enzymatic activity of two plant species in a peatland in Northeast China".Science of the Total Environment 625(2018):640-646.
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