Roles of soil amendments in the water and salt transport of coastal saline soils through regulation of microstructure

生物炭 土壤水分 土壤盐分 土壤结构 微观结构 修正案 环境科学 多孔性 土壤改良剂 碱土 土壤科学 农学 化学 生物 有机化学 热解 政治学 法学 结晶学
作者
Yuanhang Fei,Dongli She,Jun Yi,Xiaoqin Sun,Han Xiao,Dongdong Liu,Muxing Liu,Hailin Zhang
出处
期刊:Land Degradation & Development [Wiley]
卷期号:35 (7): 2382-2394 被引量:3
标识
DOI:10.1002/ldr.5066
摘要

Abstract Increasing scientific knowledge on the improvement of coastal saline soils is critical for spatially expanding coastal development. Biochar and polyacrylamide (PAM) are popular soil amendments, however, it remains unclear how they affect water and salt transport by regulating soil microstructure characteristics. In this study, we conducted a five‐year rice barrel trial and investigated the changes in the aggregates and microstructure of saline soils after adding biochar with three different application rates (B1 = 0%, B2 = 2%, and B3 = 5%, mass ratio) and PAM with three different application rates (P1 = 0%, P2 = 0.4‰, and P3 = 1.0‰, mass ratio), and simulated the water and salt transport. Results showed that at B1 and B2 treatments, soil μ ‐CT porosity in 2020 increased by 89.8% and 208.0%, respectively, with respect to that in 2016. The development of soil mesopore structure was promoted at B2 treatments, whereas the P2 and P3 treatments promoted the development of the soil macrostructure. Compared with those of the blank control, soil internal mean water flow rate increased by 22.2% at B2 treatments and 69.2% at P2 treatments, respectively. However, their increases were less pronounced at B3 treatments and the water flow rate decreased by 50.5% at P3 treatments. It might be reasonably attributed to the reason that porous biochar helped the formation of soil pore structure while an excessive amount of biochar blocked soil pores. Furthermore, PAM amendment helped to form soil aggregates while an excessive amount of viscous PAM might block soil pores or form a viscous layer. The time corresponding to the maximum salt concentration was negatively correlated with soil μ ‐CT porosity ( R 2 = 0.27) and pore connectivity density ( R 2 = 0.29). Our findings indicate that appropriate amounts of biochar and PAM can help improve saline soil structure in coastal areas, improve their hydraulic properties, and alleviate salt stress.
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
喵喵完成签到 ,获得积分10
刚刚
研友_VZG7GZ应助1337003319采纳,获得30
1秒前
曼凡发布了新的文献求助10
1秒前
xx发布了新的文献求助10
1秒前
眼睛大雨筠应助牟稀采纳,获得50
1秒前
2秒前
2秒前
2秒前
十六完成签到,获得积分10
3秒前
3秒前
3秒前
Andy1201应助Hatexist采纳,获得50
3秒前
4秒前
SYLH应助许安采纳,获得10
4秒前
Ava应助开心超人采纳,获得10
4秒前
4秒前
南国有佳人完成签到,获得积分10
5秒前
5秒前
曾丹发布了新的文献求助10
5秒前
乐乐应助TianxingLiu采纳,获得10
5秒前
mamin完成签到,获得积分10
5秒前
5秒前
Water发布了新的文献求助10
6秒前
Lee完成签到,获得积分10
6秒前
djiwisksk66发布了新的文献求助100
6秒前
小镇青年发布了新的文献求助10
7秒前
yar应助爱撒娇的惋清采纳,获得10
7秒前
7秒前
上官若男应助醉翁采纳,获得10
7秒前
8秒前
KYpaopao完成签到,获得积分20
8秒前
佩琪完成签到,获得积分10
8秒前
8秒前
8秒前
Jasper应助xpdnpu采纳,获得10
9秒前
ZWK发布了新的文献求助10
9秒前
lmplzzp发布了新的文献求助10
9秒前
9秒前
10秒前
陈sir发布了新的文献求助10
10秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 360
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 3971277
求助须知:如何正确求助?哪些是违规求助? 3515939
关于积分的说明 11180280
捐赠科研通 3251061
什么是DOI,文献DOI怎么找? 1795664
邀请新用户注册赠送积分活动 875937
科研通“疑难数据库(出版商)”最低求助积分说明 805209