| 论文编号: | |
| 论文题目: | Impacts of land use change on soil organic matter chemistry in the Everglades, Florida - a characterization with pyrolysis-gas chromatography mass spectrometry |
| 英文论文题目: | Impacts of land use change on soil organic matter chemistry in the Everglades, Florida - a characterization with pyrolysis-gas chromatography mass spectrometry |
| 第一作者: | 张仲胜 |
| 英文第一作者: | Zhong S.Zhang |
| 联系作者: | 张仲胜 |
| 英文联系作者: | Zhong S.Zhang |
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| 发表年度: | 2019 |
| 卷: | 338 |
| 期: | |
| 页码: | 393-400 |
| 摘要: | Reclamationofmarshlandsfor agricultural land use is widespread. An example of large-scale land use shifts is evident in the Everglades Agricultural Area of Florida where freshwaterwetlandswere converted tosugarcane(Saccharum officinarum) production. Such land-use shifts can markedly influencesoil organic mattercycling and processes. The effect of suchland use changeon molecular characteristics of soilorganic carbonis unknown. In this study, three surface soils cores (0–5？cm, 5–10？cm, and 10–19？cm) from a representative marsh and a sugarcane field in the Florida Everglades with known land use history andmanagement practiceswere characterized using pyrolysis-gas chromatography–mass spectrometry (Py-GC/MS) to investigate molecular characteristics of soil organic matter. Soil organic carbon (SOC), total nitrogen, total sulfur, and water extractable organic carbon contents in sugarcane soil were 37.02%, 2.44%, 0.46% and 0.11%, while they were 44.57%, 2.62%, 0.73% and 0.38%, respectively. On the whole, marshland reclamation to sugarcane caused increase of aromatics (from 11.37% to 13.20%), polyaromatichydrocarbon(from 0% to 1.63%),n-alkanes (from 8.90% to 16.17%),n-alkenes (from 25.10% to 28.77%), other aliphatics (from 7.33% to 11.77%) and fatty acids (from 1.93% to 3.87%) inpyrolysisproducts of soil organic matter (SOM), whereas this shift reducedlignin(from 12.87% to 2.47%),phenols(from 23.33% to 16.13%),polysaccharides(from 2.40% to 1.03%),benzofuran(from 1.67% to 0.27) and nitrogen containing compounds (from 5.07% to 4.67%), respectively. Overall, the conversion of marsh to sugarcane land use not only reduced total SOC contents but also altered molecular features of SOM with significant increases in aliphatic fractions and almost completeexhaustionof lignin fractions, signifying SOC dynamic shift due to land change in the Everglades. |
| 英文摘要: | Reclamationofmarshlandsfor agricultural land use is widespread. An example of large-scale land use shifts is evident in the Everglades Agricultural Area of Florida where freshwaterwetlandswere converted tosugarcane(Saccharum officinarum) production. Such land-use shifts can markedly influencesoil organic mattercycling and processes. The effect of suchland use changeon molecular characteristics of soilorganic carbonis unknown. In this study, three surface soils cores (0–5？cm, 5–10？cm, and 10–19？cm) from a representative marsh and a sugarcane field in the Florida Everglades with known land use history andmanagement practiceswere characterized using pyrolysis-gas chromatography–mass spectrometry (Py-GC/MS) to investigate molecular characteristics of soil organic matter. Soil organic carbon (SOC), total nitrogen, total sulfur, and water extractable organic carbon contents in sugarcane soil were 37.02%, 2.44%, 0.46% and 0.11%, while they were 44.57%, 2.62%, 0.73% and 0.38%, respectively. On the whole, marshland reclamation to sugarcane caused increase of aromatics (from 11.37% to 13.20%), polyaromatichydrocarbon(from 0% to 1.63%),n-alkanes (from 8.90% to 16.17%),n-alkenes (from 25.10% to 28.77%), other aliphatics (from 7.33% to 11.77%) and fatty acids (from 1.93% to 3.87%) inpyrolysisproducts of soil organic matter (SOM), whereas this shift reducedlignin(from 12.87% to 2.47%),phenols(from 23.33% to 16.13%),polysaccharides(from 2.40% to 1.03%),benzofuran(from 1.67% to 0.27) and nitrogen containing compounds (from 5.07% to 4.67%), respectively. Overall, the conversion of marsh to sugarcane land use not only reduced total SOC contents but also altered molecular features of SOM with significant increases in aliphatic fractions and almost completeexhaustionof lignin fractions, signifying SOC dynamic shift due to land change in the Everglades. |
| 刊物名称: | Geoderma |
| 英文刊物名称: | Geoderma |
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| 参与作者: | Z. S. Zhang, J. J. Wang, X. G. Lyu, M. Jiang, J. Bhadha and A. Wright |
| 英文参与作者: | Z. S. Zhang, J. J. Wang, X. G. Lyu, M. Jiang, J. Bhadha and A. Wright |
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Impacts of land use change on soil organic matter chemistry in the Everglades, Florida - a character
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