Soil aggregate microstructure and microbial community structure mediate soil organic carbon accumulation: Evidence from one-year field experiment

表土 底土 耕作 土壤碳 土壤科学 环境科学 土壤结构 土壤健康 农学 土壤有机质 土壤水分 生物
作者
Weijun Zhang,Lars J. Munkholm,Xu Liu,Tingting An,Yingde Xu,Zhuang Ge,Ninghui Xie,Aimeng Li,Yuqi Dong,Chang Peng,Shuangyi Li,Jingkuan Wang
出处
期刊:Geoderma [Elsevier BV]
卷期号:430: 116324-116324 被引量:75
标识
DOI:10.1016/j.geoderma.2023.116324
摘要

Soil organic carbon (SOC) accumulation is easily susceptible to tillage managements, which strongly affect soil structure and microbial community structure. Subsoiling is developed for mitigating soil compaction and thus improving soil structure. Coupled with straw residue incorporation, it is expected not only to enhance this improvement but also to promote organic carbon (C) storage in soil. However, how subsoiling tillage managements change soil aggregate microstructure, microbial community structure and SOC fractions, and how soil aggregate microstructure and microbial community structure affect SOC in the topsoil and subsoil layers are equally unknown. An in-situ incubation field experiment was conducted in a Mollisol in northeastern China and included conventional tillage (CT), subsoiling tillage (ST) and subsoiling tillage with straw residue incorporation (ST + S). The methods of synchrotron-based X-ray micro-computed tomography scanning, phospholipid fatty acid and SOC density fractionation were used to analyze aggregate pore characteristics, microbial community structure and SOC fractions, respectively. The results showed that both ST and especially ST + S not only improved soil aggregate microstructure but also enhanced microbial biomass and then favored SOC accrual in the topsoil (0–20 cm). In the subsoil (20–35 cm), ST + S exerted similar positive effects as those in the topsoil. However, ST only improved soil aggregate microstructure but decreased microbial community biomass and SOC in the subsoil. Moreover, soil aggregate structure characteristics explained (solely explained 6 % in the topsoil and 12 % in the subsoil, respectively) a smaller part of the variation in SOC within aggregates than soil microbial characteristics did (solely explained 15 % in the topsoil and 25 % in the subsoil, respectively). Specifically, bacteria explained 26 % and 66 % of the variation in SOC within aggregates in the topsoil and subsoil, respectively. The porosity of macropores (>100 μm) also explained 25 % of the variation in SOC within aggregates in the topsoil, whereas the porosity of micropores (<30 μm) explained more variation (12 %) than that of macropores (3 %) in the subsoil. Notably, the substantially different interaction mechanism-processed of pore characteristics, microbial structure and SOC between topsoil and subsoil was probably traceable for the variation in the influx of organic C, pore size distribution and microbial adaptability in soil layers. These results would provide new insights on tillage managements strategies for improving soil conditions in terms of optimizing soil aggregate microstructure–microbes–SOC interactions in the topsoil and subsoil layers.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
2秒前
2秒前
2秒前
威武雪兰完成签到,获得积分10
2秒前
2秒前
一坨完成签到 ,获得积分10
2秒前
科研通AI5应助net80yhm采纳,获得10
3秒前
lh发布了新的文献求助10
4秒前
Einson完成签到 ,获得积分10
5秒前
lx发布了新的文献求助10
5秒前
001完成签到,获得积分10
6秒前
开着飞机骑拖拉机完成签到,获得积分10
6秒前
寇婧怡完成签到 ,获得积分10
7秒前
阿湫发布了新的文献求助10
7秒前
Qsss发布了新的文献求助10
7秒前
7秒前
8秒前
JamesPei应助111采纳,获得10
8秒前
执笔完成签到,获得积分10
8秒前
手可摘星辰完成签到 ,获得积分10
9秒前
量子星尘发布了新的文献求助10
9秒前
李健应助大帅采纳,获得10
10秒前
11秒前
冷艳的火龙果完成签到,获得积分10
11秒前
不知完成签到 ,获得积分10
11秒前
Zard发布了新的文献求助10
13秒前
清仔发布了新的文献求助10
13秒前
14秒前
大地上的鱼完成签到,获得积分10
14秒前
14秒前
上官若男应助平常的路人采纳,获得10
14秒前
小花发布了新的文献求助10
15秒前
庸俗完成签到,获得积分10
16秒前
17秒前
论文顺利发布了新的文献求助10
17秒前
17秒前
砚行书完成签到,获得积分10
17秒前
CodeCraft应助Qsss采纳,获得10
17秒前
情怀应助葫芦娃采纳,获得10
18秒前
小慈爱鸡完成签到 ,获得积分10
18秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038524
求助须知:如何正确求助?哪些是违规求助? 3576221
关于积分的说明 11374737
捐赠科研通 3305912
什么是DOI,文献DOI怎么找? 1819354
邀请新用户注册赠送积分活动 892688
科研通“疑难数据库(出版商)”最低求助积分说明 815048