Four Exceptional Simple Steps For 3-Methyladenine

We established monocultures and two- and four-species mixtures of common grass species with diverging functional traits: Lolium perenne L. http://www.selleckchem.com/products/r428.html (Lp), Festuca arundinacea Schreb. (Fa), Phleum pratense L. (Php) and Poa trivialis L. (Pt), and quantified N2O emissions for 42?days. We found no relation between plant species richness and N2O emissions. However, N2O emissions were significantly reduced in specific plant species combinations. In the absence of urine, plant communities of Fa+Php acted as a sink for N2O, whereas the monocultures of these species constituted a N2O source. With urine application Lp+Pt plant communities reduced (P? http://www.selleck.cn/products/3-methyladenine.html soil organic matter (De Deyn et?al., 2008). However, the latter beneficial effect on the net greenhouse gas (GHG) balance is largely offset by fluxes of nitrous oxide (N2O), of which grassland ecosystems account for 18% of global emissions (Lee et?al., 1997; Lubbers et?al., 2011). Nitrous oxide is a potent GHG with a molecular global warming potential 298 times higher than CO2 (IPCC, 2007), and is today's single most important ozone-depleting emission (Ravishankara et?al., 2009). Although the role of grassland species richness http://www.selleckchem.com/products/PF-2341066.html and composition as key drivers of primary productivity and C sequestration has been widely studied (e.g., De Deyn et?al., 2009; Dias et?al., 2010), its influence on N2O emissions remains largely unexplored apart from a few studies that found that legumes tend to stimulate N2O emissions (e.g., Niklaus et?al., 2006). Plant species richness (i.e., the number of species present) and/or community composition (i.e., the particular species present) may affect N2O emissions by influencing abiotic and biotic soil factors.