Characteristics of Different Types of Heavy Fraction Organic Carbon in Ningxia Irrigation Zone

YANG Feixia; CAO Guangchao; YU Dongsheng; SHI Xuezheng; YU Quanbo; DONG Linlin

doi:10.13961/j.cnki.stbctb.2017.06.014

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Characteristics of Different Types of Heavy Fraction Organic Carbon in Ningxia Irrigation Zone

- Characteristics of Different Types of Heavy Fraction Organic Carbon in Ningxia Irrigation Zone
- Bulletin of Soiland Water Conservation Vol. 37, Issue 6, Pages: 85-91(2017)
- 作者机构：
  
  1. 青海师范大学地理科学学院,青海,西宁,810001
  2. 青海省自然地理与环境过程重点实验室,青海,西宁,810001
  3. 土壤与农业可持续发展国家重点实验室中国科学院南京土壤研究所,江苏,南京,210008
  4. 苏州市农业科学院,江苏,苏州,215155
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.06.014
  CLC：
- Published：2017
- 稿件说明：
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YANG Feixia, CAO Guangchao, YU Dongsheng, et al. Characteristics of Different Types of Heavy Fraction Organic Carbon in Ningxia Irrigation Zone[J]. Bulletin of Soiland Water Conservation, 2017, 37(6): 85-91.
DOI：

YANG Feixia, CAO Guangchao, YU Dongsheng, et al. Characteristics of Different Types of Heavy Fraction Organic Carbon in Ningxia Irrigation Zone[J]. Bulletin of Soiland Water Conservation, 2017, 37(6): 85-91. DOI： 10.13961/j.cnki.stbctb.2017.06.014.

摘要

[目的]探究宁夏引黄灌区土壤总有机碳与重组有机碳的特征及相互关系，为研究宁夏引黄灌区固碳效应及碳库稳定性提供科学依据。[方法]以宁夏引黄灌区为研究对象，通过实地采样与分析，测定不同土壤类型总有机碳与重组有机碳含量。[结果]土壤类型是影响宁夏引黄灌区土壤有机碳变化的主要因素，经灌溉耕作后，灌溉土壤总有机碳及重组有机碳含量较对照土壤均有所增加，平均增加量分别为2.27和2.02 g/kg，增加量随土层深度增加而减小，增加幅度因土壤类型存在差异；重组有机碳与总有机碳存在显著相关关系（p < 0.001）。[结论]重组有机碳是总有机碳的重要部分，它与总有机碳之间的相关性随着土层深度的增加而增强，说明灌溉耕作活动及灌溉时间对土壤有机碳具有一定的影响。研究重组有机碳能更好地了解灌区土壤碳库稳定性。

Abstract

[Objective] Explore the characteristics of soil total organic carbon and heavy fraction organic carbon and their relationship to provide scientific bases for studying the carbon fixation effect and soil stability in Ningxia irrigation zone.[Methods] Taking Ningxia irrigation zone as the study area

the contents of total and heavy fraction organic carbon of 5 different types of soil were measured.[Results] Soil type is the main factor for change of soil organic carbon in the Ningxia irrigation zone. After different durations of irrigation and cultivation

total and heavy fraction organic carbon of irrigated soil were both increased. As compared with the non-irrigation and non-cultivation soil

the average increments were 2.27 and 2.02 g/kg

respectively. The increments decreased with the increase of soil depth

but the amplitudes differed among different soil types. There existed significant correlation between fraction organic carbon and total organic carbon.[Conclusion] Heavy fraction organic carbon is an important part of total organic carbon

its correlation with total organic carbon increase with the increase of soil depth. Irrigation and cultivation activities and irrigation time have influence on the soil organic carbon. Studying the fraction organic carbon can better understand soil carbon and soil stability.

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