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	Nutrient limitation and wetland botanical diversity in northeast china: can fertilization influence on species richness?
	Xu, Zhiguo; Yan, Baixing; He, Yan; Song, Changchun
刊名	Soil science
	2007
卷号	172期号:1页码:86-93
关键词	Fertilization Plant n/p ratios Soil ph Species diversity Sanjiang marsh wetland Northeast china
ISSN号	0038-075X
DOI	10.1097/01.ss.0000240547.67.422.2f
通讯作者	Xu, zhiguo()
英文摘要	The effect of fertilization on species richness was investigated in wetland ecosystems in northeast china. plant nitrogen-to-phosphorus ratios (n/p) were used to assess nutrient limitation. a freshwater wetland carex lasiocarpa community was grown at 12 nutrient treatments (4 n treatments, 4 p treatments, and 4 n + p treatments) and 1 control. plant nutrient concentrations, soil ph, and species richness were determined after two growing seasons. fertilization induced changes in plant n/p and soil ph. the marsh wetland plants species richness responded differently to nutrients and soil ph. the relationship between species richness and plant n/p ratios was unimodal. plant species richness was maximal when the n/p ratio approached 9.5, because availability of nutrient supply was balanced when the plant n/p ratios were close to 9.5. the species richness decreased slightly with n/p < 9.5 and n/p > 9.5. both n and p availability influenced species richness. p fertilization increased species richness in the n treatment. species richness increased from 4.3 to 5.6 with p input in the treatment using 4 g m(-2) year(-1) of n and from 3.3 to 6.0 with increasing p input in the treatment using 40 g m-2 year-1 of n. n fertilization also increased species richness in the p treatment. species richness increased from 4.3 to 5.6 with increasing n input in the treatment using 1.2 g m(-2) year 1 of p and from 4.6 to 6.0 with increasing n input in the treatment using 19.2 g m(-2) year 1 of p. however, p input resulted in plant n/p ratio deviation from the optimal value, thus species richness decreased in the wetland. p may be a severe constraint of species richness in the wetland. there was a significantly positive liner relationship between soil ph and species richness. species have different nutrient requirements and exploit nutrients with varying efficiency, which induce changes of soil ph. by univariate analysis of variance, the unique effect of soil ph accounted for most of the explained variation in species richness. the species richness variance explained jointly by n/p ratios and soil ph was 28.0%.
WOS关键词	PLANT DIVERSITY ; NITROGEN ; AVAILABILITY ; VEGETATION ; GRASSLAND ; HEATHLAND ; ACIDIFICATION ; RESPONSES ; PATTERNS ; AMMONIUM
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	LIPPINCOTT WILLIAMS & WILKINS
WOS记录号	WOS:000243569100007
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2381904
专题	中国科学院大学
通讯作者	Xu, Zhiguo
作者单位	1.Chinese Acad Sci, Key Lab Wetland Ecol & Environm, NE Inst Geog & Agr Ecol, Changchun, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xu, Zhiguo,Yan, Baixing,He, Yan,et al. Nutrient limitation and wetland botanical diversity in northeast china: can fertilization influence on species richness?[J]. Soil science,2007,172(1):86-93.
APA	Xu, Zhiguo,Yan, Baixing,He, Yan,&Song, Changchun.(2007).Nutrient limitation and wetland botanical diversity in northeast china: can fertilization influence on species richness?.Soil science,172(1),86-93.
MLA	Xu, Zhiguo,et al."Nutrient limitation and wetland botanical diversity in northeast china: can fertilization influence on species richness?".Soil science 172.1(2007):86-93.

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