Yi Xiao , Rong Huang , Weiliang Xiong , Binbin Liu , Qinghua Zhou , Tao Jiang , Vanessa N.L. Wong , Jiang Liu , Yingjie Wu , Youlin Luo , Qiquan Li , Qiang Xu , Ting Lan , Changquan Wang , Bing Li
{"title":"有机肥通过与土壤矿物质的相互作用加剧了稻田DOM的垂直异质性","authors":"Yi Xiao , Rong Huang , Weiliang Xiong , Binbin Liu , Qinghua Zhou , Tao Jiang , Vanessa N.L. Wong , Jiang Liu , Yingjie Wu , Youlin Luo , Qiquan Li , Qiang Xu , Ting Lan , Changquan Wang , Bing Li","doi":"10.1016/j.still.2025.106454","DOIUrl":null,"url":null,"abstract":"<div><div>Dissolved organic matter (DOM) is a complicated soluble organic composite in soils that is known to be linked to carbon turnover, nutrient cycling, and climate change. However, uncertainties exist about the potential influence of soil Fe and Mn oxides on DOM characteristics in paddy soil profiles following the application of inorganic and organic fertilizers. We investigated the DOM characteristics in a paddy soil profile (0–40 cm) treated with inorganic and organic fertilizers and the relationships between DOM and Fe and Mn oxides. The paddy soils were subjected to four fertilizer treatments: a control with no fertilizer (CK), inorganic fertilizer only (NPK), 50 % chemical N substituted with organic fertilizer (NPKM), and 100 % chemical N substituted with organic fertilizer (M). Ultraviolet<img>visible (UV<img>Vis) spectroscopy and fluorescence excitation-emission matrix (EEM) spectrophotometry were integrated to explore the vertical variation in the DOM. There were no significant differences in the DOM content between the surface soil (0–20 cm) and the subsurface soil (20–40 cm) under the CK, NPK, and NPKM treatments. However, the DOM content significantly increased with soil depth under the M treatment. The application of organic fertilizer resulted in a significant reduction in the aromaticity and hydrophobic components of the DOM, as well as the fluorescence intensity of the humic-like and protein-like components with increasing soil depth; the content of easily reducible Fe significantly increased, whereas the total Mn and reducible Mn contents significantly decreased with increasing soil depth. The addition of organic fertilizer increased the vertical variation in the DOM characteristics of the paddy soil profiles. The consistency and correlation analysis of the DOM and Fe and Mn oxide contents in the profile indicated that Fe and Mn oxides might be the main influencing factors of DOM vertical heterogeneity, which was mediated by the weakening of mineral protection and the increase in the degree of mineral dissimilar reduction with increasing soil depth.</div></div>","PeriodicalId":49503,"journal":{"name":"Soil & Tillage Research","volume":"248 ","pages":"Article 106454"},"PeriodicalIF":6.1000,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Organic fertilizer intensifies the vertical heterogeneity of DOM in paddy fields through interactions with soil minerals\",\"authors\":\"Yi Xiao , Rong Huang , Weiliang Xiong , Binbin Liu , Qinghua Zhou , Tao Jiang , Vanessa N.L. Wong , Jiang Liu , Yingjie Wu , Youlin Luo , Qiquan Li , Qiang Xu , Ting Lan , Changquan Wang , Bing Li\",\"doi\":\"10.1016/j.still.2025.106454\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Dissolved organic matter (DOM) is a complicated soluble organic composite in soils that is known to be linked to carbon turnover, nutrient cycling, and climate change. However, uncertainties exist about the potential influence of soil Fe and Mn oxides on DOM characteristics in paddy soil profiles following the application of inorganic and organic fertilizers. We investigated the DOM characteristics in a paddy soil profile (0–40 cm) treated with inorganic and organic fertilizers and the relationships between DOM and Fe and Mn oxides. The paddy soils were subjected to four fertilizer treatments: a control with no fertilizer (CK), inorganic fertilizer only (NPK), 50 % chemical N substituted with organic fertilizer (NPKM), and 100 % chemical N substituted with organic fertilizer (M). Ultraviolet<img>visible (UV<img>Vis) spectroscopy and fluorescence excitation-emission matrix (EEM) spectrophotometry were integrated to explore the vertical variation in the DOM. There were no significant differences in the DOM content between the surface soil (0–20 cm) and the subsurface soil (20–40 cm) under the CK, NPK, and NPKM treatments. However, the DOM content significantly increased with soil depth under the M treatment. The application of organic fertilizer resulted in a significant reduction in the aromaticity and hydrophobic components of the DOM, as well as the fluorescence intensity of the humic-like and protein-like components with increasing soil depth; the content of easily reducible Fe significantly increased, whereas the total Mn and reducible Mn contents significantly decreased with increasing soil depth. The addition of organic fertilizer increased the vertical variation in the DOM characteristics of the paddy soil profiles. The consistency and correlation analysis of the DOM and Fe and Mn oxide contents in the profile indicated that Fe and Mn oxides might be the main influencing factors of DOM vertical heterogeneity, which was mediated by the weakening of mineral protection and the increase in the degree of mineral dissimilar reduction with increasing soil depth.</div></div>\",\"PeriodicalId\":49503,\"journal\":{\"name\":\"Soil & Tillage Research\",\"volume\":\"248 \",\"pages\":\"Article 106454\"},\"PeriodicalIF\":6.1000,\"publicationDate\":\"2025-01-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Soil & Tillage Research\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S016719872500008X\",\"RegionNum\":1,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"SOIL SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Soil & Tillage Research","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S016719872500008X","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"SOIL SCIENCE","Score":null,"Total":0}
Organic fertilizer intensifies the vertical heterogeneity of DOM in paddy fields through interactions with soil minerals
Dissolved organic matter (DOM) is a complicated soluble organic composite in soils that is known to be linked to carbon turnover, nutrient cycling, and climate change. However, uncertainties exist about the potential influence of soil Fe and Mn oxides on DOM characteristics in paddy soil profiles following the application of inorganic and organic fertilizers. We investigated the DOM characteristics in a paddy soil profile (0–40 cm) treated with inorganic and organic fertilizers and the relationships between DOM and Fe and Mn oxides. The paddy soils were subjected to four fertilizer treatments: a control with no fertilizer (CK), inorganic fertilizer only (NPK), 50 % chemical N substituted with organic fertilizer (NPKM), and 100 % chemical N substituted with organic fertilizer (M). Ultravioletvisible (UVVis) spectroscopy and fluorescence excitation-emission matrix (EEM) spectrophotometry were integrated to explore the vertical variation in the DOM. There were no significant differences in the DOM content between the surface soil (0–20 cm) and the subsurface soil (20–40 cm) under the CK, NPK, and NPKM treatments. However, the DOM content significantly increased with soil depth under the M treatment. The application of organic fertilizer resulted in a significant reduction in the aromaticity and hydrophobic components of the DOM, as well as the fluorescence intensity of the humic-like and protein-like components with increasing soil depth; the content of easily reducible Fe significantly increased, whereas the total Mn and reducible Mn contents significantly decreased with increasing soil depth. The addition of organic fertilizer increased the vertical variation in the DOM characteristics of the paddy soil profiles. The consistency and correlation analysis of the DOM and Fe and Mn oxide contents in the profile indicated that Fe and Mn oxides might be the main influencing factors of DOM vertical heterogeneity, which was mediated by the weakening of mineral protection and the increase in the degree of mineral dissimilar reduction with increasing soil depth.
期刊介绍:
Soil & Tillage Research examines the physical, chemical and biological changes in the soil caused by tillage and field traffic. Manuscripts will be considered on aspects of soil science, physics, technology, mechanization and applied engineering for a sustainable balance among productivity, environmental quality and profitability. The following are examples of suitable topics within the scope of the journal of Soil and Tillage Research:
The agricultural and biosystems engineering associated with tillage (including no-tillage, reduced-tillage and direct drilling), irrigation and drainage, crops and crop rotations, fertilization, rehabilitation of mine spoils and processes used to modify soils. Soil change effects on establishment and yield of crops, growth of plants and roots, structure and erosion of soil, cycling of carbon and nutrients, greenhouse gas emissions, leaching, runoff and other processes that affect environmental quality. Characterization or modeling of tillage and field traffic responses, soil, climate, or topographic effects, soil deformation processes, tillage tools, traction devices, energy requirements, economics, surface and subsurface water quality effects, tillage effects on weed, pest and disease control, and their interactions.