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DOI	10.1111/ele.12956
	Calcium plus magnesium indicates digestibility: the significance of the second major axis of plant chemical variation for ecological processes
	Mládková P.; Mládek J.; Hejduk S.; Hejcman M.; Pakeman R.J.
发表日期	2018
ISSN	1461023X
卷号	21 期号:6
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
英文关键词	asterids; biomass; dicots; leaf dry matter content; leaf economics spectrum; monocots; nitrogen; phosphorus; rosids; rumen liquor
语种	英语
scopus关键词	asterids; Dicotyledoneae; Liliopsida; rosids; calcium; magnesium; nitrogen; phosphorus; phylogeny; plant; plant leaf; plant physiology; Calcium; Magnesium; Nitrogen; Phosphorus; Phylogeny; Plant Leaves; Plant Physiological Phenomena; Plants
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/121313
作者单位	Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Kamýcká 1176, Prague 6–Suchdol, 165 21, Czech Republic; Department of Ecology & Environmental Sciences, Faculty of Science, Palacký University, Šlechtitelů 241/27, Olomouc, 783 71, Czech Republic; Department of Animal Nutrition and Forage Production, Faculty of Agronomy, Mendel University, Zemědělská 1, Brno, 613 00, Czech Republic; The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, United Kingdom
推荐引用方式 GB/T 7714	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],2018,21(6).
APA	Mládková P.,Mládek J.,Hejduk S.,Hejcman M.,&Pakeman R.J..(2018).Calcium plus magnesium indicates digestibility: the significance of the second major axis of plant chemical variation for ecological processes.Ecology Letters,21(6).
MLA	Mládková P.,et al."Calcium plus magnesium indicates digestibility: the significance of the second major axis of plant chemical variation for ecological processes".Ecology Letters 21.6(2018).