https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33596 Thu 22 Nov 2018 13:48:22 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24869 13C-labeled Pinus massoniana leaf litter. An orthogonal experiment with three levels of N (0, 81, and 270 mg N kg^-1 soil) and S (0, 121, and 405 mg S kg^-1 soil) was conducted. We traced the incorporation of ¹³C-litter into carbon dioxide (CO₂), dissolved organic C (DOC), and microbial phospholipids. Over the 420-day incubation, litter decomposition did not respond to low N and S additions but increased under high levels and combined amendments (NS). However, litter-derived CO₂ emissions were enhanced during the first 56 days, with a positive interaction of N x S. N additions promoted fungal growth, while S stimulated growth of Gram-positive bacteria, fungi, and actinobacteria. Increased decomposition was related to higher litter-derived DOC and fungi/bacteria ratio. Inversely, N and/or S amendments inhibited decomposition (N > NS > S) from day 57 afterwards, possibly due to C limitation and decreased abundances of Gram-negative bacteria and actinobacteria. These results suggested that N deposition interacted with S to affect litter decomposition, and this effect depended on N and S deposition levels and litter decomposition stage.]]> Sat 24 Mar 2018 07:11:21 AEDT ]]>