globalchange  > 气候减缓与适应
DOI: 10.1111/ele.12956
Scopus记录号: 2-s2.0-85044674429
论文题名:
Calcium plus magnesium indicates digestibility: the significance of the second major axis of plant chemical variation for ecological processes
作者: Mládková P.; Mládek J.; Hejduk S.; Hejcman M.; Pakeman R.J.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2018
卷: 21, 期:6
起始页码: 885
结束页码: 895
语种: 英语
英文关键词: asterids ; biomass ; dicots ; leaf dry matter content ; leaf economics spectrum ; monocots ; nitrogen ; phosphorus ; rosids ; rumen liquor
Scopus关键词: asterids ; Dicotyledoneae ; Liliopsida ; rosids
英文摘要: Plant variation in nutrient concentrations encompasses two major axes. The first is connected to nitrogen (N) and phosphorus (P), reflects growth rate and has been designated as the leaf economics spectrum (LES) while the second follows the gradient in calcium (Ca) and magnesium (Mg) and mirrors cell structural differences. Here, we tested in grasslands whether the sum Ca + Mg concentrations is a better indicator of digestibility than LES constituents. Structural equation modelling revealed that the total effect size of N (0.30) on digestibility was much lower than that of Ca + Mg (0.58). The N effect originated predominantly from sampling date (biomass ageing), while the Ca + Mg effect largely from phylogenetic composition (proportion of monocots). Thus, plant variation in partially substitutable divalent cations seems to play a significant role in biomass digestion by ruminants. This finding contests, together with litter decomposition studies, the prominent role of the LES for understanding both fundamental ecological processes. © 2018 John Wiley & Sons Ltd/CNRS
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107439
Appears in Collections:气候减缓与适应

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作者单位: Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Kamýcká 1176, Prague 6–Suchdol, Czech Republic; Department of Ecology & Environmental Sciences, Faculty of Science, Palacký University, Šlechtitelů 241/27, Olomouc, Czech Republic; Department of Animal Nutrition and Forage Production, Faculty of Agronomy, Mendel University, Zemědělská 1, Brno, Czech Republic; The James Hutton Institute, Craigiebuckler, Aberdeen, United Kingdom

Recommended Citation:
Mládková P.,Mládek J.,Hejduk S.,et al. Calcium plus magnesium indicates digestibility: the significance of the second major axis of plant chemical variation for ecological processes[J]. Ecology Letters,2018-01-01,21(6)
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