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农学学报 ›› 2021, Vol. 11 ›› Issue (12): 48-52.doi: 10.11923/j.issn.2095-4050.cjas20190700137

所属专题: 耕地保护

• 土壤肥料/资源环境/生态 • 上一篇    下一篇

黏土矿物改良剂对新垦砂壤质耕地土壤有机碳积累的影响

吕晓菡1(), 章明奎2(), 严建立1   

  1. 1杭州市农业科学研究院,杭州 310024
    2浙江大学环境与资源学院,杭州 310058
  • 收稿日期:2019-07-29 修回日期:2019-11-12 出版日期:2021-12-20 发布日期:2022-01-14
  • 通讯作者: 章明奎 E-mail:45718653@qq.com;mkzhang@zju.edu.cn
  • 作者简介:吕晓菡,女,1982年出生,浙江新昌人,高级农艺师,硕士,主要从事植物生理生化及土壤培肥等方面的研究与推广。通信地址:310024 杭州市西湖区转塘街道朱泗261号 杭州市农业科学研究院,E-mail: 45718653@qq.com
  • 基金资助:
    浙江省重点研发计划项目“丘陵山地垦造耕地地力快速协调提升关键技术研究与应用”(2019C02035)

Effects of Clay Mineral Amendments on Soil Organic Carbon Accumulation in Newly Reclaimed Sandy Loam Farmland

LV Xiaohan1(), ZHANG Mingkui2(), YAN Jianli1   

  1. 1Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, Zhejiang, China
    2College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China
  • Received:2019-07-29 Revised:2019-11-12 Online:2021-12-20 Published:2022-01-14
  • Contact: ZHANG Mingkui E-mail:45718653@qq.com;mkzhang@zju.edu.cn

摘要:

为了解黏土矿物改良剂在新垦耕地地力提升中的作用,选择膨润土、高岭石、沸石和硅藻土4种黏土矿物,在添加量为10%的条件下,采用培养试验研究其对有机肥料矿化及土壤有机碳积累的影响。结果表明,与对照比较,添加黏土矿物可明显增加土壤有机碳的积累,其效果由强到弱为膨润土、高岭石、硅藻土、沸石;团聚体分析和重液分组结果表明,添加黏土矿物可显著增加土壤水稳定性团聚体数量,促进矿物结合态有机碳的形成。研究认为,黏土矿物增加有机碳稳定性是其促进土壤有机碳积累的主要原因。

关键词: 黏土矿物, 有机碳积累, 新垦耕地, 土壤团聚体, 砂壤土

Abstract:

To understand the role of clay mineral amendments in improving the soil fertility of newly reclaimed farmland, four clay minerals, bentonite, kaolinite, zeolite and diatomite, were selected for testing their effects on mineralization of organic fertilizers and accumulation of soil organic carbon by incubation experiments with 10% addition of the amendments. The results showed that the addition of clay minerals could significantly increase the accumulation of soil organic carbon as compared with the control, and the effect decreased in the order of bentonite> kaolinite> diatomite> zeolite. Aggregate measurement and heavy liquid fractionation showed that the addition of clay minerals could significantly increase the amount of water-stable aggregates in the soils and promote the formation of mineral-bound organic carbon. In general, clay minerals could increase the stability of organic carbon, which is the main reason for increasing organic carbon accumulation in the soils.

Key words: Clay Minerals, Organic Carbon Accumulation, Newly Cultivated Farmland, Soil Aggregates, Sandy Loam

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