| 陶宝先,张保华,董杰,刘晨阳.设施耕作促进农田土壤有机碳矿化[J].农业环境科学学报,2017,36(12):2486-2492. |
| 设施耕作促进农田土壤有机碳矿化 |
| Effect of greenhouse cultivation on the decomposition of organic carbon in agricultural soils |
| 投稿时间：2017-08-28 |
| DOI：10.11654/jaes.2017-1171 |
| 中文关键词: 设施菜地 土壤有机碳 温度敏感性(Q10) 交互作用 寿光市 |
| 英文关键词: greenhouse soil soil organic carbon temperature sensitivity(Q10) interactive effect Shouguang City |
| 基金项目:国家自然科学基金青年基金项目（41501099）；山东省自然科学基金项目（ZR2014DQ015，ZR2016DM14）；聊城大学基金项目（318051430） |
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| 中文摘要: |
| 为研究土地利用方式变化与温度对土壤有机碳矿化的交互作用，利用室内培养实验，研究了寿光市农田转变为设施菜地及设施菜地荒废与增温对土壤有机碳矿化的交互作用。结果表明：增温显著促进土壤有机碳矿化（P<0.01），农田、设施菜地及荒废设施菜地土壤有机碳累积矿化量分别增加56.08%、42.32%和42.36%。农田转变为设施菜地显著促进土壤有机碳矿化（P<0.05），设施菜地有机碳累积矿化量分别增加185.81%（25℃）、160.61%（35℃）。相同增温条件对设施菜地土壤有机碳累积矿化量的促进作用明显高于农田，这主要是因为设施菜地土壤有机碳易分解组分的温度敏感性系数（Q10=1.79）明显高于农田（Q10=1.37），且设施菜地土壤颗粒有机碳含量明显高于农田造成的。设施菜地荒废后，交互作用变为加和效应，因其土壤有机碳易分解组分的温度敏感性系数（Q10=1.41）与农田无差异。综上所述，设施耕作显著促进土壤有机碳矿化，其中增温与农田转变为设施菜地对土壤有机碳矿化的交互作用为正效应。因此，利用单因素之和评估多因素对土壤有机碳矿化的综合影响可能会低估其影响水平。 |
| 英文摘要: |
| An incubation experiment was conducted to investigate the interactive effect of temperature and land use change, either from farmland (FL) to greenhouse soil (GH) or in abandoned greenhouse soil (AG), on the decomposition of soil organic carbon (SOC) in Shouguang City. Temperature increased the cumulative SOC decomposition by 56.08%, 42.32%, and 42.36% in the FL, GH, and AG, respectively (P<0.01). Land use change from FL to GH significantly enhanced SOC decomposition (P<0.05), and the cumulative SOC decomposition of the GH increased by 185.81% at 25℃ and by 160.61% at 35℃. The positive effect of temperature on SOC decomposition was greater in the GH than in the FL, possibly owing to the GH's larger Q10 value of the labile SOC fractions (Q10=1.79 vs. Q10=1.37) and the larger concentration of particulate organic carbon. The interactive effect of temperature and land use change from FL to AG was additive, owing to the similar labile SOC Q10 values of the two land use types (Q10=1.41). In general, the GH exhibited greater cumulative SOC decomposition than the FL, and the combination of temperature and land use change (from FL to GH) produced a synergistic effect on SOC decomposition. Therefore, the interactive of land use change and temperature on SOC decomposition may be underestimated based on the separate effects of each factor. |
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