The influence of freeze-thaw cycles on Se migration and soil microorganisms in northeast paddy soil

IF 5.4 Q2 ENGINEERING, ENVIRONMENTAL
Ping Wang , Jiaxing Yu , Xiaohui Lu, Jinfeng Li, Long Sun, Ming Li
{"title":"The influence of freeze-thaw cycles on Se migration and soil microorganisms in northeast paddy soil","authors":"Ping Wang ,&nbsp;Jiaxing Yu ,&nbsp;Xiaohui Lu,&nbsp;Jinfeng Li,&nbsp;Long Sun,&nbsp;Ming Li","doi":"10.1016/j.hazadv.2024.100551","DOIUrl":null,"url":null,"abstract":"<div><div>Freeze-thaw cycles (FTCs) are a typical climatic feature in northeast of China. Due to global climate change, the frequency of freezing and thawing during the autumn and winter seasons is increasing, which may affect soil physicochemical properties and biological characteristics in freeze-thaw regions. In northeast of China, selenium (Se) is used to spray paddy fields to increase Se content in rice. However, the impact of FTCs on the environmental behavior of Se in paddy soils in northeast of China is not well understood, especially under the background of increasing frequency of FTCs. In this study, indoor simulated FTCs experiment was conducted to investigate the influence of FTCs frequency, soil water content, size of soil aggregate on the Se migration and soil microorganisms in paddy soil column. The results showed that FTCs increased the proportion of microaggregates and soil organic matter content while decreased soil pH. After 60 days, the Se concentration in microaggregates and macroaggregates at 6–10 cm depth increased from 0.148 mg/kg to 0.601 mg/kg and from 0.154 mg/kg to 0.630 mg/kg, respectively; the increment were more than those of the UNFT-Se treatment group (from 0.148 mg/kg to 0.309 mg/kg and from 0.159 mg/kg to 0.318 mg/kg). Se concentration in microaggregates and macroaggregates at 16–20 cm depths increased from 0.144 mg/kg to 0.367 mg/kg and from 0.152 mg/kg to 0.378 mg/kg, respectively; the increment were more than those of the UNFT-Se treatment group (from 0.144 mg/kg to 0.196 mg/kg and from 0.168 mg/kg to 0.207 mg/kg), indicating that FTCs promoted the downward migration of Se in the soil column. Correlation analysis indicated there was a positive correlation (<em>r</em> = 0.458, <em>p</em> &lt; 0.01) between Se concentration and organic matter as well as a negative correlation (<em>r</em> = −0.406, <em>p</em> &lt; 0.01) between Se concentration and soil pH, respectively. Additionally, high-throughput sequencing results showed that FTCs induced changes in the soil microbial community. These findings have important implications for geochemical studies of exogenous Se in soils of the seasonally freeze-thaw aeras.</div></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"17 ","pages":"Article 100551"},"PeriodicalIF":5.4000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of hazardous materials advances","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2772416624001517","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0

Abstract

Freeze-thaw cycles (FTCs) are a typical climatic feature in northeast of China. Due to global climate change, the frequency of freezing and thawing during the autumn and winter seasons is increasing, which may affect soil physicochemical properties and biological characteristics in freeze-thaw regions. In northeast of China, selenium (Se) is used to spray paddy fields to increase Se content in rice. However, the impact of FTCs on the environmental behavior of Se in paddy soils in northeast of China is not well understood, especially under the background of increasing frequency of FTCs. In this study, indoor simulated FTCs experiment was conducted to investigate the influence of FTCs frequency, soil water content, size of soil aggregate on the Se migration and soil microorganisms in paddy soil column. The results showed that FTCs increased the proportion of microaggregates and soil organic matter content while decreased soil pH. After 60 days, the Se concentration in microaggregates and macroaggregates at 6–10 cm depth increased from 0.148 mg/kg to 0.601 mg/kg and from 0.154 mg/kg to 0.630 mg/kg, respectively; the increment were more than those of the UNFT-Se treatment group (from 0.148 mg/kg to 0.309 mg/kg and from 0.159 mg/kg to 0.318 mg/kg). Se concentration in microaggregates and macroaggregates at 16–20 cm depths increased from 0.144 mg/kg to 0.367 mg/kg and from 0.152 mg/kg to 0.378 mg/kg, respectively; the increment were more than those of the UNFT-Se treatment group (from 0.144 mg/kg to 0.196 mg/kg and from 0.168 mg/kg to 0.207 mg/kg), indicating that FTCs promoted the downward migration of Se in the soil column. Correlation analysis indicated there was a positive correlation (r = 0.458, p < 0.01) between Se concentration and organic matter as well as a negative correlation (r = −0.406, p < 0.01) between Se concentration and soil pH, respectively. Additionally, high-throughput sequencing results showed that FTCs induced changes in the soil microbial community. These findings have important implications for geochemical studies of exogenous Se in soils of the seasonally freeze-thaw aeras.

Abstract Image

冻融循环对东北水稻土硒迁移及土壤微生物的影响
冻融循环(FTCs)是中国东北地区典型的气候特征。由于全球气候变化,秋冬季节的冻融频率增加,冻融区土壤的理化性质和生物特性可能受到影响。在东北地区,利用硒(Se)喷施水田,提高水稻硒含量。然而,目前对东北水稻土中硒的环境行为的影响还不是很清楚,特别是在东北水稻土中硒的环境行为越来越频繁的背景下。本研究通过室内模拟FTCs试验,研究FTCs频率、土壤含水量、土壤团聚体粒径对水稻土柱中硒迁移和土壤微生物的影响。结果表明:施肥增加了土壤微团聚体比例和土壤有机质含量,降低了土壤ph。60 d后,6 ~ 10 cm深度的微团聚体和大团聚体硒含量分别从0.148 mg/kg和0.154 mg/kg增加到0.630 mg/kg;增加幅度大于UNFT-Se处理组(从0.148 mg/kg增加到0.309 mg/kg和从0.159 mg/kg增加到0.318 mg/kg)。16 ~ 20 cm深度微团聚体和大团聚体硒浓度分别从0.144 mg/kg和0.152 mg/kg增加到0.367 mg/kg和0.378 mg/kg;增加幅度大于ftt -Se处理组(从0.144 mg/kg增加到0.196 mg/kg,从0.168 mg/kg增加到0.207 mg/kg),说明FTCs促进了Se在土柱中的向下迁移。相关分析显示两者呈正相关(r = 0.458, p <;0.01),且呈负相关(r = - 0.406, p <;硒浓度与土壤pH值的关系为0.01)。此外,高通量测序结果显示,FTCs诱导了土壤微生物群落的变化。这些发现对季节性冻融地区土壤外源硒的地球化学研究具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Journal of hazardous materials advances
Journal of hazardous materials advances Environmental Engineering
CiteScore
4.80
自引率
0.00%
发文量
0
审稿时长
50 days
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信