Nutrient limitation and wetland botanical diversity in northeast china: can fertilization influence on species richness?
文献类型：期刊论文
| 作者 | Xu, Zhiguo; Yan, Baixing; He, Yan; Song, Changchun |
| 刊名 | Soil science
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000243569100007 |
| 出版者 | LIPPINCOTT WILLIAMS & WILKINS |
| URI标识 | http://www.irgrid.ac.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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来源：中国科学院大学
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