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Soil Organic Carbon Pool and Its Chemical Composition in Phyllostachy pubescens Forests at Two Altitudes in Jian-ou City, China.

Ji H, Zhuang S, Zhu Z, Zhong Z - PLoS ONE (2015)

Bottom Line: However, the proportions of the three combined humus C showed no significant differences between the two altitudes.The results of 13C-NMR showed that the SOC chemical composition did not significantly vary with elevation as well.Overall, the results suggested that altitude should be considered during regional SOC estimation and that altitude affected the quantity rather than the quality of the SOC under the same P. pubescens vegetation.

View Article: PubMed Central - PubMed

Affiliation: State Key Lab of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu Province, China.

ABSTRACT
Phyllostachys pubescens forests play an important role in soil organic carbon (SOC) sequestration in terrestrial ecosystems. However, the estimation and mechanism of SOC sequestration by P. pubescens forests remain unclear. In this study, the effect of P. pubescens forest distribution with elevation was investigated at two altitude sites in Jian-ou City, Southeast China. SOC storage was estimated and its chemical composition was obtained via 13C-nuclear magnetic resonance (NMR), chemical classification, and spectral analysis. Results showed that the SOC contents and stocks were significantly higher at the high-altitude site than at the low-altitude site in the entire soil profile (0-60 cm). The C contents of the three combined humus forms exhibited similar responses to the elevation change, and all of these forms were higher at the high-altitude site than at the low-altitude site regardless of soil layer. However, the proportions of the three combined humus C showed no significant differences between the two altitudes. The results of 13C-NMR showed that the SOC chemical composition did not significantly vary with elevation as well. This finding was consistent with the E465/E665 of the loosely combined humus. Overall, the results suggested that altitude should be considered during regional SOC estimation and that altitude affected the quantity rather than the quality of the SOC under the same P. pubescens vegetation.

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Comparison of SOC storage in the different soil layers between two elevations.LAS: low-altitude site; HAS: high-altitude site.
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pone.0146029.g001: Comparison of SOC storage in the different soil layers between two elevations.LAS: low-altitude site; HAS: high-altitude site.

Mentions: As shown in Fig 1, the SOC storage in the 0–60 cm layer amounted to 81.75 Mg hm−2 in the LAS, which was lower than 118.6 Mg hm−2 in the HAS (P < 0.05). In the 0–10 cm, 10–20 cm, 20–40 cm, and 40–60 cm layers, SOC storage was also lower in the LAS than in the HAS. However, the difference in SOC content between the two sites was significant only in the 0–10 cm and 20–40 cm layers and not in the 10–20 cm and 40–60 cm layers(P < 0.05).


Soil Organic Carbon Pool and Its Chemical Composition in Phyllostachy pubescens Forests at Two Altitudes in Jian-ou City, China.

Ji H, Zhuang S, Zhu Z, Zhong Z - PLoS ONE (2015)

Comparison of SOC storage in the different soil layers between two elevations.LAS: low-altitude site; HAS: high-altitude site.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4696818&req=5

pone.0146029.g001: Comparison of SOC storage in the different soil layers between two elevations.LAS: low-altitude site; HAS: high-altitude site.
Mentions: As shown in Fig 1, the SOC storage in the 0–60 cm layer amounted to 81.75 Mg hm−2 in the LAS, which was lower than 118.6 Mg hm−2 in the HAS (P < 0.05). In the 0–10 cm, 10–20 cm, 20–40 cm, and 40–60 cm layers, SOC storage was also lower in the LAS than in the HAS. However, the difference in SOC content between the two sites was significant only in the 0–10 cm and 20–40 cm layers and not in the 10–20 cm and 40–60 cm layers(P < 0.05).

Bottom Line: However, the proportions of the three combined humus C showed no significant differences between the two altitudes.The results of 13C-NMR showed that the SOC chemical composition did not significantly vary with elevation as well.Overall, the results suggested that altitude should be considered during regional SOC estimation and that altitude affected the quantity rather than the quality of the SOC under the same P. pubescens vegetation.

View Article: PubMed Central - PubMed

Affiliation: State Key Lab of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, Jiangsu Province, China.

ABSTRACT
Phyllostachys pubescens forests play an important role in soil organic carbon (SOC) sequestration in terrestrial ecosystems. However, the estimation and mechanism of SOC sequestration by P. pubescens forests remain unclear. In this study, the effect of P. pubescens forest distribution with elevation was investigated at two altitude sites in Jian-ou City, Southeast China. SOC storage was estimated and its chemical composition was obtained via 13C-nuclear magnetic resonance (NMR), chemical classification, and spectral analysis. Results showed that the SOC contents and stocks were significantly higher at the high-altitude site than at the low-altitude site in the entire soil profile (0-60 cm). The C contents of the three combined humus forms exhibited similar responses to the elevation change, and all of these forms were higher at the high-altitude site than at the low-altitude site regardless of soil layer. However, the proportions of the three combined humus C showed no significant differences between the two altitudes. The results of 13C-NMR showed that the SOC chemical composition did not significantly vary with elevation as well. This finding was consistent with the E465/E665 of the loosely combined humus. Overall, the results suggested that altitude should be considered during regional SOC estimation and that altitude affected the quantity rather than the quality of the SOC under the same P. pubescens vegetation.

Show MeSH
Related in: MedlinePlus