DOI: 10.1111/gcb.14123
Scopus记录号: 2-s2.0-85044955128
论文题名: Land use intensity, rather than plant species richness, affects the leaching risk of multiple nutrients from permanent grasslands
作者: Klaus V.H. ; Kleinebecker T. ; Busch V. ; Fischer M. ; Hölzel N. ; Nowak S. ; Prati D. ; Schäfer D. ; Schöning I. ; Schrumpf M. ; Hamer U.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 7 起始页码: 2828
结束页码: 2840
语种: 英语
英文关键词: drought
; fertilization
; grassland biodiversity
; grazing
; ion-exchange resin bags
; mowing
; nitrate leaching
; phosphorus
Scopus关键词: biodiversity
; drought
; grassland
; grazing
; ion exchange
; land use
; leaching
; nitrate
; nutrient dynamics
; phosphorus
英文摘要: The intensification of land use constitutes one of the main drivers of global change and alters nutrient fluxes on all spatial scales, causing landscape-level eutrophication and contamination of natural resources. Changes in soil nutrient concentrations are thus indicative for crucial environmental issues associated with intensive land use. We measured concentrations of NO3–N, NH4–N, P, K, Mg, and Ca using 1,326 ion-exchange resin bags buried in 20 cm depth beneath the main root zone in 150 temperate grasslands. Nutrient concentrations were related to land use intensity, that is, fertilization, mowing, grazing intensities, and plant diversity by structural equation modeling. Furthermore, we assessed the response of soil nutrients to mechanical sward disturbance and subsequent reseeding, a common practice for grassland renewal. Land use intensity, especially fertilization, significantly increased the concentrations of NO3–N, NH4–N, K, P, and also Mg. Besides fertilization (and tightly correlated mowing) intensity, grazing strongly increased NO3–N and K concentrations. Plant species richness decreased P and NO3–N concentrations in soil when grassland productivity of the actual year was statistically taken into account, but not when long-term averages of productivity were used. Thus, we assume that, in the actual study year, a distinct drought period might have caused the observed decoupling of productivity from fertilization and soil nutrients. Breaking up the grassland sward drastically increased NO3–N concentrations (+146%) but reduced NH4–N, P, and K concentrations, unbalancing soil nutrient stoichiometry and boosting the risk of N leaching. Reseeding the sward after disturbance did not have a short-term effect on nutrient concentrations. We conclude that renewal of permanent grassland should be avoided as far as possible and future grassland management has to strongly rise the effectiveness of fertilization. Additionally, grassland management might have to increasingly taking care of periods of drought, in which nutrient additions might not increase plant growth but potentially only facilitate leaching. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110365
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Institute of Landscape Ecology, University of Münster, Münster, Germany; Institute of Agricultural Sciences, ETH Zürich, Zürich, Switzerland; Institute of Plant Sciences, University of Bern, Bern, Switzerland; MEET—Münster Electrochemical Energy Technology, Münster University, Münster, Germany; Max-Planck-Institute for Biogeochemistry, Jena, Germany
Recommended Citation:
Klaus V.H.,Kleinebecker T.,Busch V.,et al. Land use intensity, rather than plant species richness, affects the leaching risk of multiple nutrients from permanent grasslands[J]. Global Change Biology,2018-01-01,24(7)