蔗糖和纤维素影响土壤有机碳矿化的后效研究

论文总字数：19582字

目 录

摘要 ……………………………………………………………………1

Abstract ………………………………………………………………1

1 材料与方法 …………………………………………………………3

• 1. 供试土壤和外源碳材料 ……………………………………………………………3
  2. 研究方法 ……………………………………………………………………………3
  3. 数据计算与分析 ……………………………………………………………………3

2 结果及分析 …………………………………………………………4

2.1 蔗糖和纤维素添加对土壤CO₂释放速率的响 ……………………………………4

2.2 蔗糖和纤维素配施对土壤CO₂释放速率的响 ……………………………………5

2.3 蔗糖和纤维素添加对土壤累积CO₂释放速率的响 ………………………………5

2.4 蔗糖和纤维素配施对土壤累积CO₂释放速率的响 ………………………………6

2.5 蔗糖添加对土壤碳的激发效应 ……………………………………………………7

2.6 纤维素添加对土壤碳的激发效应 …………………………………………………7

2.7 蔗糖和纤维素添加对土壤全氮（TN)含量的影响 …………………………………8

2.8 蔗糖和纤维素添加对土壤C/N的影响 ……………………………………………8

2.9 蔗糖和纤维素添加对土壤水溶性碳(DOC)的影响 ………………………………9

2.10蔗糖和纤维素添加对土壤总碳变化量的影响……………………………………10

3 结论 …………………………………………………………………11

4 讨论 …………………………………………………………………11

5 创新与不足 …………………………………………………………11

5.1 创新点 ………………………………………………………………………………11

5.2 不足之处 ……………………………………………………………………………11

6 展望与建议 …………………………………………………………11

参考文献 ………………………………………………………………13

蔗糖和纤维素影响土壤有机碳矿化的后效研究

阿丽米热·阿布都外力

，China

Abstract：【Objective】 To study the effect of sucrose and cellulose on the mineralization of soil organic carbon, a incubation experiment was carried out to explore the respond of CO₂ emission, SOC and nitrogen to the sucrose and celluloseaddition.【Methods】After adding 100g dry soil in the incubated bottle, sucrose and cellulose were added to the soil by adding 5% of the organic carbon content to 25 C for 35 days, adding sucrose and cellulose respectively, and adding sucrose and cellulose together to observe the late effect of the mineralization .【results】The soil respiration rate of sucrose treatment increased by 27.52% compared with the blank control group,Cumulative CO₂ emissions increased by 85.48%.The soil respiration rate increased by 1.59% and the cumulative CO₂ emission increased by 4.55%.Two kinds of exogenous carbon distribution group, the amount of CO₂ accumulated by adding sucrose in the later stage increased by 26.84% compared with the control group, and the excitation effect was increased by 794.55%.Late adding cellulose processing accumulated CO₂ emissions increased by 0.27%, and the inspiration effect than the control group increased by 58.48%. Add sugar processing soil C/N was lower than those of cellulose processing, and so on were significantly higher than that of cellulose processing.【Conclusion】Both sucrose and cellulose have a positive excitation effect on the mineralization of the original organic carbon in the soil, and the excitation effect of added sucrose is significantly greater than that of the addition of cellulose.Sucrose promotes the effect of cellulose on soil organic carbon mineralization; The effect of cellulose inhibition on the mineralization of soil organic carbon by sucrose.The late addition of sucrose can significantly improve soil organic carbon mineralization and excitation effect. In the later stage, the treatment of cellulose was significantly higher than that of other treatment groups.

Key words：organic carbon, priming effect, mineralization,maize straw

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