Vertical distribution of soil extractable organic C and N contents and total C and N stocks in 78-year-old tree plantations in subtropical Australia
Author(s)
Zhou, Xiaoqi
Dong, Haibo
Lan, Zhongming
Bacon, Gary
Hao, Yanbin
Chen, Chengrong
Griffith University Author(s)
Year published
2017
Metadata
Show full item recordAbstract
Few studies have focused on the effects of long-term forest plantations on the soil profile of carbon (C) and nitrogen (N) stocks. In this study, we selected 78-year-old tree plantations that included three coniferous tree species (i.e., slash pine, hoop pine and kauri pine) and a Eucalyptus species in subtropical Australia. We measured soil extractable organic C (EOC) and N (EON) contents and total C and N stocks under different tree species on the forest floor and along a soil profile to 100 cm depth. The results showed that Eucalyptus had significantly higher soil EOC contents (3.3 Mg ha−1) than the other tree species ...
View more >Few studies have focused on the effects of long-term forest plantations on the soil profile of carbon (C) and nitrogen (N) stocks. In this study, we selected 78-year-old tree plantations that included three coniferous tree species (i.e., slash pine, hoop pine and kauri pine) and a Eucalyptus species in subtropical Australia. We measured soil extractable organic C (EOC) and N (EON) contents and total C and N stocks under different tree species on the forest floor and along a soil profile to 100 cm depth. The results showed that Eucalyptus had significantly higher soil EOC contents (3.3 Mg ha−1) than the other tree species (EOC of 1.9–2.3 Mg ha−1) and had significantly higher EON (156 kg ha−1) contents than slash pine (107 kg ha−1). Eucalyptus had significantly higher soil C (58.9 Mg ha−1) and N (2.03 Mg ha−1) stocks than the other tree species (22.3–27.6 Mg C ha−1 and 0.71–1.23 Mg N ha−1) at 0–100 cm depth. There were no differences in soil C stocks at the 0–100 cm depth among the coniferous tree species. Forest floor C stocks had stronger effects on mineral soil total N stocks than fine root biomass, whereas fine root biomass exerted stronger effects on soil total C stocks at the 0–100 cm depth than forest floor C and N stocks. Our results addressed large differences in soil C and N stocks under different tree species, which can provide useful information for local forest management practices in this region.
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View more >Few studies have focused on the effects of long-term forest plantations on the soil profile of carbon (C) and nitrogen (N) stocks. In this study, we selected 78-year-old tree plantations that included three coniferous tree species (i.e., slash pine, hoop pine and kauri pine) and a Eucalyptus species in subtropical Australia. We measured soil extractable organic C (EOC) and N (EON) contents and total C and N stocks under different tree species on the forest floor and along a soil profile to 100 cm depth. The results showed that Eucalyptus had significantly higher soil EOC contents (3.3 Mg ha−1) than the other tree species (EOC of 1.9–2.3 Mg ha−1) and had significantly higher EON (156 kg ha−1) contents than slash pine (107 kg ha−1). Eucalyptus had significantly higher soil C (58.9 Mg ha−1) and N (2.03 Mg ha−1) stocks than the other tree species (22.3–27.6 Mg C ha−1 and 0.71–1.23 Mg N ha−1) at 0–100 cm depth. There were no differences in soil C stocks at the 0–100 cm depth among the coniferous tree species. Forest floor C stocks had stronger effects on mineral soil total N stocks than fine root biomass, whereas fine root biomass exerted stronger effects on soil total C stocks at the 0–100 cm depth than forest floor C and N stocks. Our results addressed large differences in soil C and N stocks under different tree species, which can provide useful information for local forest management practices in this region.
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Journal Title
Environmental Science and Pollution Research
Volume
24
Issue
28
Subject
Chemical sciences
Environmental sciences
Other environmental sciences not elsewhere classified
Biological sciences