撂荒年限对陕北黄土区山地枣林深层土壤有机碳的影响

宗巧鱼; 艾宁; 刘广全; 刘长海; 冯辽辽; 张智勇; 刘姣; 郝宝宝

doi:10.11913/PSJ.2095-0837.2021.10042

撂荒年限对陕北黄土区山地枣林深层土壤有机碳的影响

宗巧鱼¹,
艾宁^1,2, ,,
刘广全³,
刘长海^1,2,
冯辽辽¹,
张智勇¹,
刘姣¹,
郝宝宝¹

1. 延安大学生命科学学院, 陕西延安 716000;
2. 陕西省红枣重点实验室, 陕西延安 716000;
3. 中国水利水电科学研究院, 北京 100083

基金项目:

国家重点研发计划（2016YFC0501705，2016YFC0501602）；延安市科技计划项（2019ZDQY-036）；延安大学校级科技项目（YDQ2016-47）。

详细信息

作者简介:
宗巧鱼,女,硕士研究生,研究方向为水土保持与林业生态工程(E-mail:Zongqiaoyu@163.com)。

通讯作者:
艾宁,E-mail:aining_office@126.com

中图分类号: Q948
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出版历程
- 收稿日期: 2020-10-09
- 修回日期: 2020-12-07
- 网络出版日期: 2022-10-31
- 发布日期: 2021-02-27

Effects of abandonment on deep soil organic carbon in mountain Ziziphus jujuba Mill. forests of the loess area in northern Shaanxi

1. College of Life Science, Yan'an University, Yan'an, Shaanxi 716000, China;
2. Shaanxi Key Laboratory of Chinese Jujube, Yan'an University, Yan'an, Shaanxi 716000, China;
3. China Institute of Water Resources and Hydropower Research, Beijing 100083, China

Funds:

This work was supported by grants from the National Key R&D Program of China (2016YFC0501705, 2016YFC0501602), Yan'an Science and Technology Plan Project (2019ZDQY-036), and Yan'an University School-Level Science and Technology Project (YDQ2016-47).

摘要

摘要: 以陕西省延安市延川县齐家山红枣试验示范基地不同撂荒年限山地枣林（Ziziphus jujuba Mill.）为研究对象，采用空间代替时间的方法，研究该地区0~340 cm土壤有机碳的分布特征以及撂荒年限对有机碳分布的影响。结果显示：研究区土壤有机碳含量及有机碳储量具有明显的表聚现象；不同撂荒年限土壤有机碳储量差异显著，深层土壤有机碳储量达到整个土壤剖面的60%。在0~20 cm土壤有机碳含量与撂荒年限的增加呈正相关，撂荒20年（a）有机碳含量最高（12.62 g/kg），撂荒1 a有机碳含量最低（7.82 g/kg）。土壤深层有机碳（200~340 cm），随着撂荒年限的增加而降低，但不同撂荒年限间差异不显著。撂荒1 a土壤有机碳含量与土壤容重显著相关；撂荒3 a和6 a土壤有机碳含量与土壤速效钾显著相关；撂荒20 a土壤有机碳含量与土壤速效氮、砂砾含量显著相关。研究结果表明撂荒年限对土壤深层有机碳的分布影响较小。
- 陕北黄土区 /
- 枣林 /
- 不同撂荒年限 /
- 有机碳 /
- 深层土壤
Abstract: This paper explored the distribution characteristics and influence of abandonment on deep soil organic carbon (SOC) in the Qijiashan mountain Ziziphus jujuba Mill. (jujube) forests of the loess area of Yanchuan County in northern Shaanxi. Research on SOC in the 0-340 cm soil layer showed that:SOC content and organic carbon storage in the study area exhibited obvious surface accumulation. Significant differences in SOC storage were found for different years of abandonment (P < 0.05). Deep SOC storage reached 60% of the entire soil profile, and SOC content in the 0-20 cm soil layer was positively correlated with the increase in abandonment years. The highest organic carbon content (12.62 g/kg) was found after 20 years of abandonment, whereas the lowest organic carbon content (7.82 g/kg) was found after 1 year abandonment. Deep SOC (200-340 cm) decreased with the increase in years of abandonment, but the differences observed among the different abandonment years were not significant. Furthermore, SOC content was significantly correlated with soil bulk density in the first year of abandonment, with soil available potassium after 3-6 years of abandonment, and with soil available nitrogen and gravel content after 20 years of abandonment. Thus, these results indicate that years of abandonment has little effect on the distribution of SOC in deep soil, but research on organic carbon in deep soil cannot be ignored.
- Loess area in Northern Shaanxi /
- Ziziphus jujuba forest /
- Abandonment /
- Organic carbon /
- Deep soil

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