气候变化领域集成服务门户(CCPortal): Seasonality is more important than forest type in regulating the pool size and composition of soil soluble N in temperate forests

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DOI	10.1007/s10533-020-00698-z
	Seasonality is more important than forest type in regulating the pool size and composition of soil soluble N in temperate forests
	Gao L.; Hill P.W.; Jones D.L.; Guo Y.; Gao F.; Cui X.
发表日期	2020
ISSN	0168-2563
起始页码	279
结束页码	295
卷号	150 期号:3
英文摘要	Soil soluble nitrogen (N) is crucial to the N nutrition and productivity of plants. Consequently, understanding the factors that affect its pool size and composition is of considerable importance. Here, six typical forest types in northeast China were investigated to determine the dynamics of soil soluble N across seasons and plant communities, and the potential drivers. Soil free amino acids, NH4+, NO3−, dissolved organic N (DON) and a variety of soil characteristics were measured over the growing season (from May to September). Seasonality showed a stronger effect on the availability of soil inorganic N and free amino acids than vegetation. The coefficients of variation of soil inorganic N, amino acid-N and the potential drivers (moisture and DON) appeared to be greater for season, and the concentrations of these available N sources tended to be higher at the beginning than at the height of growing season. Potential soil drivers (e.g. moisture, microbial biomass-N and DON) and plant phenology together drove the seasonal dynamics of inorganic N and amino acid-N. Arginine, histidine, serine, leucine, aspartic acid, glycine, glutamic acid and proline composed the dominant soil amino acid pool in the temperate forest soils. The basic amino acids (arginine and histidine) were consistently dominant irrespective of vegetation and season, suggesting that selective sorption by the soil solid phase could play an important role in regulating the cycling of amino acid-N in these temperate forest ecosystems. This research indicates that changes in local soil properties, and plant phenology caused by seasonality, exert a powerful influence on the characteristics of plant-soil N cycling. © 2020, Springer Nature Switzerland AG.
英文关键词	Dominant amino acids; Growing season; Plant-soil N cycling; Soil soluble N; Temperate forests
语种	英语
scopus关键词	amino acid; dissolved organic nitrogen; phenology; seasonality; soil chemistry; solubility; sorption; temperate environment; temperate forest; vegetation structure; China
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153105
作者单位	School of Forestry, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China; School of Natural Sciences, Environment Centre Wales, Bangor University, Bangor, Gwynedd LL57 2UW, United Kingdom; SoilsWest, UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
推荐引用方式 GB/T 7714	Gao L.,Hill P.W.,Jones D.L.,et al. Seasonality is more important than forest type in regulating the pool size and composition of soil soluble N in temperate forests[J],2020,150(3).
APA	Gao L.,Hill P.W.,Jones D.L.,Guo Y.,Gao F.,&Cui X..(2020).Seasonality is more important than forest type in regulating the pool size and composition of soil soluble N in temperate forests.Biogeochemistry,150(3).
MLA	Gao L.,et al."Seasonality is more important than forest type in regulating the pool size and composition of soil soluble N in temperate forests".Biogeochemistry 150.3(2020).