Leaf P increase outpaces leaf N in an Inner Mongolia grassland over 27 years

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	Leaf P increase outpaces leaf N in an Inner Mongolia grassland over 27 years
	Mi, Zhaorong ; Huang, Yuanyuan ; Gan, Huijie ; Zhou, Wenjia ; Flynn, Dan F. B. ; He, Jin-Sheng
	2015
发表期刊	BIOLOGY LETTERS
摘要	The dynamics of leaf nitrogen (N) and phosphorus (P) have been intensively explored in short-term experiments, but rarely at longer timescales. Here, we investigated leaf N: P stoichiometry over a 27-year interval in an Inner Mongolia grassland by comparing leaf N: P concentration of 2006 with that of 1979. Across 80 species, both leaf N and P increased, but the increase in leaf N lagged behind that of leaf P, leading to a significant decrease in the N: P ratio. These changes in leaf N: P stoichiometry varied among functional groups. For leaf N, grasses increased, woody species tended to increase, whereas forbs showed no change. Unlike leaf N, leaf P of grasses and forbs increased, whereas woody species showed no change. Such changes may reflect N deposition and P release induced by soil acidification over the past decades. The interannual effect of precipitation may somewhat have reduced the soil available N, leading to the more modest increase of leaf N than of leaf P. Thus, leaf N: P stoichiometry significantly responded to long-term environmental changes in this temperate steppe, but different functional groups responded differently. Our results indicate that conclusions of plant stoichiometry under short-term N fertilization should be treated with caution when extrapolating to longer timescales.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/32731
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Mi, Zhaorong,Huang, Yuanyuan,Gan, Huijie,et al. Leaf P increase outpaces leaf N in an Inner Mongolia grassland over 27 years[J]. BIOLOGY LETTERS,2015.
APA	Mi, Zhaorong,Huang, Yuanyuan,Gan, Huijie,Zhou, Wenjia,Flynn, Dan F. B.,&He, Jin-Sheng.(2015).Leaf P increase outpaces leaf N in an Inner Mongolia grassland over 27 years.BIOLOGY LETTERS.
MLA	Mi, Zhaorong,et al."Leaf P increase outpaces leaf N in an Inner Mongolia grassland over 27 years".BIOLOGY LETTERS (2015).