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中国农学通报 ›› 2021, Vol. 37 ›› Issue (26): 88-92.doi: 10.11924/j.issn.1000-6850.casb2021-0121

所属专题: 农业气象

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

冻融作用对土壤氮转化影响的研究进展

于贺1(), 谢洪宝1, 陈一民2, 王耀1, 隋跃宇2, 焦晓光1()   

  1. 1黑龙江大学现代农业与生态环境学院,哈尔滨 150080
    2中国科学院东北地理与农业生态研究所,哈尔滨 150081
  • 收稿日期:2021-02-02 修回日期:2021-05-08 出版日期:2021-09-15 发布日期:2021-09-30
  • 通讯作者: 焦晓光
  • 作者简介:于贺,女,1996年出生,黑龙江富锦人,硕士,研究方向:土壤生态。通信地址:150080 黑龙江省哈尔滨市南岗区学府路74号,Tel:0451-86609487,E-mail: 3303407923@qq.com
  • 基金资助:
    国家自然科学基金面上项目“冻融作用下秸秆还田后氮转化对农田黑土氮库更新机制的研究”(42077081);黑龙江省杰出青年科学基金“黑龙江省典型地带性土壤微生物群落结构地理分布格局”(JC2018011)

Effects of Freeze-thaw on Soil Nitrogen Conversion: Research Progress

Yu He1(), Xie Hongbao1, Chen Yimin2, Wang Yao1, Sui Yueyu2, Jiao Xiaoguang1()   

  1. 1College of Modern Agriculture and Eco-environment, Heilongjiang University, Harbin 150080
    2Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081
  • Received:2021-02-02 Revised:2021-05-08 Online:2021-09-15 Published:2021-09-30
  • Contact: Jiao Xiaoguang

摘要:

氮素是限制植物生长的重要营养元素之一,其在土壤中转化程度受多种因素影响,作为中、高纬度或高海拔地区土壤氮转化的重要驱动力,冻融作用对于土壤氮转化过程也存在极大影响。本文基于国内外已有研究成果,概述了土壤冻融循环次数、结冻持续时间以及结冻强度对于土壤氮转化过程的影响。总结出冻融格局的改变对土壤氮转化关系的一般规律:随着冻融格局的改变,均有利于土壤氮的矿化;冻融强度的增加可显著提高土壤硝态氮的含量;冻融格局的改变也会提高N2O的排放。

关键词: 冻融作用, 冻融频数, 冻融持续时间, 冻融强度, 氮矿化

Abstract:

Nitrogen is one of the important nutrients limiting plant growth, and its transformation degree in soil is affected by many factors. As an important driving force for soil N transformation in mid, high latitude or high altitude areas, the effects of freeze-thaw also has a great impact on the process of soil N transformation. Based on existing research results at home and abroad, this paper summarized the effects of soil freeze-thaw cycles, freeze duration and freeze intensity on the process of soil N transformation. We summed up the general rules of soil N transformation caused by the changes of freeze-thaw patterns: changes in freezing and thawing patterns were all conducive to the mineralization of soil N. The increase of freeze-thaw intensity could significantly increase the content of soil nitrate N. Changes in freeze-thaw patterns will also increase N2O emissions.

Key words: effect of freeze-thaw, freeze-thaw frequency, freeze-thaw duration, freeze-thaw strength, nitrogen mineralization

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