Effects of inorganic nitrogen and litters of Masson Pine on soil organic carbon decomposition

Autoři: Xin Yu aff001;  Lin Chao aff001;  Weidong Zhang aff001;  Longchi Chen aff001;  Qingpeng Yang aff001;  Guangjie Zhang aff001;  Silong Wang aff001
Působiště autorů: Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China aff001;  University of Chinese Academy of Sciences, Beijing, China aff002;  Huitong Experimental Station of Forest Ecology, Chinese Academy of Sciences, Huitong, China aff003
Vyšlo v časopise: PLoS ONE 14(9)
Kategorie: Research Article
doi: 10.1371/journal.pone.0222973


Soil organic matter (SOM) mineralization represents one of the largest fluxes in the global carbon cycle. Numerous studies have shown that soil organic carbon decomposition was largely changed owing to the addition of litter, however very few studies have focused on the role of plant organs in the priming effects (PEs). Here, we studied the effects of different Pinus massoniana organs (fresh leaf, leaf litter, twigs, absorptive fine roots, and transport fine roots) on C4 soil respiration by applying the 13C isotopic natural abundance method. Results showed that the effects of plant organs on PEs were significantly different at the end of 210 days incubation, which can be ascribed to contrasting organs traits especially non-structural carbohydrates and water-soluble compounds. Transport fine roots and fresh leaf induced positive PE, whereas absorptive fine roots induced negative PE. Leaf litter did not change the native SOC decomposition. Plant organ addition can change the microbial community and result in the reduction of bacteria-to-fungi ratio. Our results suggest that with regard to determining the PE of the entire ecosystem, using fresh leaf to represent leaf litter and aboveground to represent underground is implausible.

Klíčová slova:

Bacteria – Ecosystems – Forests – Fungi – Leaves – Pines – Trees – Fine roots


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Článek vyšel v časopise


2019 Číslo 9