Pedosphere最新文献

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Plasticulture increases the diversity rather than the abundance of microplastics in soil: A case study 塑料栽培增加了土壤中微塑料的多样性而非丰度:案例研究
IF 5.2 2区 农林科学
Pedosphere Pub Date : 2025-02-01 DOI: 10.1016/j.pedsph.2024.01.001
Shi YAO , Li XU , Yongrong BIAN , Xin JIANG , Yang SONG
{"title":"Plasticulture increases the diversity rather than the abundance of microplastics in soil: A case study","authors":"Shi YAO , Li XU , Yongrong BIAN , Xin JIANG , Yang SONG","doi":"10.1016/j.pedsph.2024.01.001","DOIUrl":"10.1016/j.pedsph.2024.01.001","url":null,"abstract":"","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 1","pages":"Pages 284-288"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139631149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Root exudate-driven rhizospheric recruitment of plant growth-promoting rhizobacteria 根系渗出物驱动的植物生长促进根瘤菌根瘤层招募
IF 5.2 2区 农林科学
Pedosphere Pub Date : 2025-02-01 DOI: 10.1016/j.pedsph.2024.03.005
Hua LIN , Caixing LAI , Guo YU , Geoffrey I. SUNAHARA , Liheng LIU , Habib ULLAH , Jie LIU
{"title":"Root exudate-driven rhizospheric recruitment of plant growth-promoting rhizobacteria","authors":"Hua LIN ,&nbsp;Caixing LAI ,&nbsp;Guo YU ,&nbsp;Geoffrey I. SUNAHARA ,&nbsp;Liheng LIU ,&nbsp;Habib ULLAH ,&nbsp;Jie LIU","doi":"10.1016/j.pedsph.2024.03.005","DOIUrl":"10.1016/j.pedsph.2024.03.005","url":null,"abstract":"<div><div>To promote growth, terrestrial plants release photosynthetic products into the rhizosphere in the form of root exudates through their root systems. Under the attraction of root exudates, plant growth-promoting rhizobacteria (PGPR) colonize the rhizosphere to stimulate plant growth and/or suppress the growth of pathogenic microorganisms. The rhizospheric recruitment of PGPR, as well as the establishment of root-microbe interactions, is initiated by chemotaxis towards root exudates. Over the past several decades, scientists have made notable strides in identifying representative chemoeffectors in root exudates, as well as the corresponding chemoreceptors. We review here the most recent developments in rhizospheric chemotaxis, particularly the chemoeffectors in root exudates, the structural and functional characterization of methyl-accepting chemotaxis proteins of PGPR, and the impacts of rhizospheric chemotaxis on root colonization, biofilm formation, and other root-microbe interactions during recruitment. Finally, we propose several perspectives that aim to fully unlock the potential of PGPR as bioinoculants in sustainable agriculture.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 1","pages":"Pages 216-228"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140269874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanisms of microbe-assisted metal tolerance in phytoremediators: A review
IF 5.2 2区 农林科学
Pedosphere Pub Date : 2025-02-01 DOI: 10.1016/j.pedsph.2024.09.003
Swati SACHDEV , Chetan KESWANI , Tatiana MINKINA , Kuldeep BAUDDH
{"title":"Mechanisms of microbe-assisted metal tolerance in phytoremediators: A review","authors":"Swati SACHDEV ,&nbsp;Chetan KESWANI ,&nbsp;Tatiana MINKINA ,&nbsp;Kuldeep BAUDDH","doi":"10.1016/j.pedsph.2024.09.003","DOIUrl":"10.1016/j.pedsph.2024.09.003","url":null,"abstract":"<div><div>Escalating anthropogenic activities have caused heavy metal contamination in the environmental matrices. Due to their recalcitrant and toxic nature, their occurrence in high titers in the environment can threaten survival of biotic components. To take the edge off, remediation of metal-contaminated sites by phytoremediators that exhibit a potential to withstand heavy metal stress and quench harmful metals is considered an eco-sustainable approach. Despite the enormous potential, phytoremediation technique suffers a setback owing to high metal concentrations, occurrence of multiple pollutants, low plant biomass, and soil physicochemical status that affect plants at cellular and molecular levels, inducing morphological, physiological, and genetic alterations. Nevertheless, augmentation of soil with microorganisms can alleviate the challenge. A positive nexus between microbes, particularly plant growth-promoting microorganisms (PGPMs), and phytoremediators can prevent phytotoxicity and augment phytoremediation by employing strategies such as production of secondary metabolites, solubilization of phosphate, and synthesis of 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase and phytohormones. Microbes can mediate tolerance in plants by fortifying their antioxidant machinery, which maintains redox homeostasis and alleviates metal-induced oxidative damage in the plants. Associated microbes can also activate stress-responsive genes in plants and abridge metal-induced toxic effects. An in-depth exploration of the mechanisms employed by plant-associated microbes to trigger tolerance in phytoremediators is crucial for improving their phytoremediation potential and real-world applications. The present article attempts to comprehensively review these mechanisms that eventually facilitate the development of improved/new technology for soil ecosystem restoration.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 1","pages":"Pages 249-263"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Methods for control of soil-borne pathogen Ceratocystis fimbriata on sweet potato: A mini review 控制甘薯上土传病原体 Ceratocystis fimbriata 的方法:微型综述
IF 5.2 2区 农林科学
Pedosphere Pub Date : 2025-02-01 DOI: 10.1016/j.pedsph.2023.12.009
Daniela D. HERRERA-BALANDRANO , Suyan WANG , Bo WANG , Dongjing YANG , Xinchi SHI , Pedro LABORDA
{"title":"Methods for control of soil-borne pathogen Ceratocystis fimbriata on sweet potato: A mini review","authors":"Daniela D. HERRERA-BALANDRANO ,&nbsp;Suyan WANG ,&nbsp;Bo WANG ,&nbsp;Dongjing YANG ,&nbsp;Xinchi SHI ,&nbsp;Pedro LABORDA","doi":"10.1016/j.pedsph.2023.12.009","DOIUrl":"10.1016/j.pedsph.2023.12.009","url":null,"abstract":"<div><div><em>Ceratocystis fimbriata</em> is a hazardous fungal pathogen that causes black rot disease in sweet potato roots, leading to devastating losses during sweet potato growth and storage. All methods for managing <em>C. fimbriata</em> on sweet potato based on synthetic fungicides, biocontrol agents, coatings, and natural compounds are reviewed for the first time. The advantages and disadvantages of the different methods are discussed, and their efficacies are compared. <em>Bacillus</em> strains and the synthetic fungicides carbendazim, flutriafol, liguoling, Stadium®, thiabendazole, and thiophanate methyl show the strongest inhibitory effects. <em>Bacillus</em> strains possess an advantage over synthetic fungicides due to the detrimental impact of the latter on human health. The application of filamentous fungi and yeasts as biocontrol agents for <em>C. fimbriata</em> management has not yet been investigated. Coatings exhibit limited protection, and no attempts have been made to combine coatings with nanoparticles or essential oils. Although the natural compounds perillaldehyde and nerol are inexpensive and non-toxic, they are of low efficacy. All management strategies have been used on postharvest sweet potato roots and leaves. However, there is no approach to controlling <em>C. fimbriata</em> in roots during plant growth. Even though several methods for controlling <em>C. fimbriata</em> on sweet potato have been reported in recent years, numerous knowledge gaps impede the development of effective and safe approaches.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 1","pages":"Pages 151-160"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139019808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rice residue management: Alternative strategies and emerging technologies for a sustainable ecosystem 稻草管理:可持续生态系统的替代战略和新兴技术
IF 5.2 2区 农林科学
Pedosphere Pub Date : 2025-02-01 DOI: 10.1016/j.pedsph.2024.06.004
Jagdish PARSHAD , Ravinder KUMAR , Vinod CHHOKAR , Nagaraj PATIL , Vikas BENIWAL , Namita SINGH , Ajay KUMAR , Nitesh SINGH , Rajesh YOGI , Mukesh KUMAR , Prashant VIKRAM , Avnish CHAUHAN , Anil KUMAR
{"title":"Rice residue management: Alternative strategies and emerging technologies for a sustainable ecosystem","authors":"Jagdish PARSHAD ,&nbsp;Ravinder KUMAR ,&nbsp;Vinod CHHOKAR ,&nbsp;Nagaraj PATIL ,&nbsp;Vikas BENIWAL ,&nbsp;Namita SINGH ,&nbsp;Ajay KUMAR ,&nbsp;Nitesh SINGH ,&nbsp;Rajesh YOGI ,&nbsp;Mukesh KUMAR ,&nbsp;Prashant VIKRAM ,&nbsp;Avnish CHAUHAN ,&nbsp;Anil KUMAR","doi":"10.1016/j.pedsph.2024.06.004","DOIUrl":"10.1016/j.pedsph.2024.06.004","url":null,"abstract":"<div><div>Rice straw, which is produced after the harvest of rice, is a major agricultural waste in the world. Rice straw has a high carbon/nitrogen ratio and is more resistant to microbial degradation than other straws because its main constituents are cellulose and hemicelluloses encrusted by lignin. When rice straw is burned, hazardous substances such as carbon dioxide, methane, carbon monoxide, and nitrogen monoxide are released into the air as smoke (less than 10 μm-sized particles). The rise in the burning of rice straw has contributed to too many accidents and health issues in the general population residing in Haryana, Punjab, and Uttar Pradesh of India. These states are being urged by the National Green Tribunal to generate money instead of burning rice straw. Even though these lignocellulosic materials might be beneficial, not much has been carried out with them. This overview covers the properties of rice straw and husks, the numerous procedures used to create valuable products, and various applications that may be made for them. These include energy sources, environmental adsorbents, building supplies, and specialist commodities.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 1","pages":"Pages 53-66"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141391795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Review of the structural properties and interfacial reactions of Al-substituted goethite, hematite and ferrihydrite 评述铝取代的鹅铁矿、赤铁矿和铁酸盐的结构特性和界面反应
IF 5.2 2区 农林科学
Pedosphere Pub Date : 2025-02-01 DOI: 10.1016/j.pedsph.2024.06.006
Yu LIANG , Hongfeng CHEN , Jinling XU , Mingxia WANG , Wenfeng TAN
{"title":"Review of the structural properties and interfacial reactions of Al-substituted goethite, hematite and ferrihydrite","authors":"Yu LIANG ,&nbsp;Hongfeng CHEN ,&nbsp;Jinling XU ,&nbsp;Mingxia WANG ,&nbsp;Wenfeng TAN","doi":"10.1016/j.pedsph.2024.06.006","DOIUrl":"10.1016/j.pedsph.2024.06.006","url":null,"abstract":"<div><div>Isomorphic substitution of ferric ion (Fe<sup>3+</sup>) by aluminum ion (Al<sup>3+</sup>) in iron (hydro)oxides is ubiquitous in natural environments. Aluminum substitution inevitably leads to changes in the microstructures, physicochemical properties, and surface reactions of iron (hydro)oxides, which may have great impacts on the sequestration of nutrients and contaminants in soils and aquatic environments. Over the past decades, the structural properties and surface reactivity of Al-substituted iron (hydro)oxides have been intensively studied. Iron (hydro)oxides in various structural forms and with different Al substitution amounts present high application potentials in addressing environmental issues. A timely summary of the structural properties and interfacial reactions of the most common and representative Al-substituted iron (hydro)oxides is of significance. Herein, the effects of Al substitution on the structural properties and surface activities of iron (hydro)oxides were clarified according to the microstructure, crystal facets, surface site type and density, interfacial reaction mechanisms, and modeling parameters of iron (hydro)oxides. This review systematically elucidates how Al substitution affects the structural properties and surface reactions of iron (hydro)oxides, including the well crystallized goethite and hematite and the poorly crystallized ferrihydrite, providing theoretical guidance for further exploration of the mineralogical characteristics and environmental geochemical behaviors of iron (hydro)oxides.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 1","pages":"Pages 42-52"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141390298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of plasticizer on removal of antibiotics and antibiotic resistance genes from agricultural soils via soil microbial fuel cells 增塑剂对土壤微生物燃料电池去除农业土壤中抗生素和抗生素抗性基因的影响
IF 5.2 2区 农林科学
Pedosphere Pub Date : 2024-12-01 DOI: 10.1016/j.pedsph.2023.11.001
Huixiang WANG , Xiaoshuai SHEN , Chen ZHANG , Yi SHAO , Hua LI , Jian WU , Yuli YANG , Hailiang SONG
{"title":"Effects of plasticizer on removal of antibiotics and antibiotic resistance genes from agricultural soils via soil microbial fuel cells","authors":"Huixiang WANG ,&nbsp;Xiaoshuai SHEN ,&nbsp;Chen ZHANG ,&nbsp;Yi SHAO ,&nbsp;Hua LI ,&nbsp;Jian WU ,&nbsp;Yuli YANG ,&nbsp;Hailiang SONG","doi":"10.1016/j.pedsph.2023.11.001","DOIUrl":"10.1016/j.pedsph.2023.11.001","url":null,"abstract":"<div><div>Soil microbial fuel cells (MFCs), a novel ecosystem technology, have recently been intensively studied for antibiotic-polluted soils. However, actual agricultural soils are always contaminated by mixed pollutants, especially plasticizers from extensively used agricultural plastic films. The aim of this study was to investigate the effects of di-2-ethylhexyl phthalate (DEHP), a representative plasticizer in soil, on the removal of sulfadiazine (SDZ), a frequently detected antibiotic in natural environments, and antibiotic resistance genes (ARGs) and microbial community in soil MFCs. Soil MFCs maintained a good antibiotic removal ability even under the influence of residual DEHP and achieved a higher removal performance at higher DEHP concentrations due to enhanced power generation. Specifically, a higher DEHP concentration had a favorable effect on antibiotic removal in soil MFCs, with the SDZ concentration decreased in both the upper and lower layers (from 4.867 ± 0.221 to 0.268 ± 0.021 and 0.293 ± 0.047 mg kg<sup>-1</sup>, respectively) of polluted soils. Moreover, a high DEHP concentration significantly promoted the abundance of bacteria associated with electricity generation compared with a lower DEHP concentration, resulting in the promotion of extracellular electron transfer and enhancing SDZ degradation. The increased ARG abundance may be caused by the enrichment of ARG potential hosts brought about by high DEHP concentration, likely due to the increased conjugative transfer frequencies of plasmid RP4 by decreasing cell membrane permeability and increasing reactive oxygen species content. The results revealed the ecological risk of residual DEHP in soil that promotes ARG transmission in soil MFCs, although it has the potential to reduce SDZ toxicity through horizontal gene transfer. We also highlight concerns regarding the management of antibiotics and plasticizers in soil. The negative effects of plasticizers on antibiotic removal should be carefully evaluated when using soil MFCs for the <em>in-situ</em> remediation of antibiotic-contaminated soil.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 6","pages":"Pages 981-992"},"PeriodicalIF":5.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135410525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Increased humic materials explain aggregate-protected carbon and nitrogen accumulation in biochar-amended tropical soils 增加的腐殖质物质解释了生物炭修正的热带土壤中团聚体保护的碳和氮积累
IF 5.2 2区 农林科学
Pedosphere Pub Date : 2024-12-01 DOI: 10.1016/j.pedsph.2023.07.006
Emmanuel AMOAKWAH , Mohammad A. RAHMAN , Khandakar R. ISLAM , Kwame A. FRIMPONG , Christian A. PHARES , Louis SACKEY , Isaac ASIRIFI , Emmanuel ARTHUR
{"title":"Increased humic materials explain aggregate-protected carbon and nitrogen accumulation in biochar-amended tropical soils","authors":"Emmanuel AMOAKWAH ,&nbsp;Mohammad A. RAHMAN ,&nbsp;Khandakar R. ISLAM ,&nbsp;Kwame A. FRIMPONG ,&nbsp;Christian A. PHARES ,&nbsp;Louis SACKEY ,&nbsp;Isaac ASIRIFI ,&nbsp;Emmanuel ARTHUR","doi":"10.1016/j.pedsph.2023.07.006","DOIUrl":"10.1016/j.pedsph.2023.07.006","url":null,"abstract":"<div><div>Humic materials make important contributions to soil organic carbon (C) and nitrogen (N) accumulation. However, information on the correlation between humic substances and the accumulation of soil aggregate-protected C and N in response to biochar application under tropical agroecosystems is limited. Therefore, a field trial was conducted to elucidate the effects of biochar on soil aggregate properties and humic materials and how these humic compounds affect aggregate-protected C and N in a humid tropical agroecosystem. The treatments included no-biochar control (CK), 15 Mg biochar ha<sup>-1</sup> (BC-15), 30 Mg biochar ha<sup>-1</sup> (BC-30), and 30 Mg biochar ha<sup>-1}</sup> + phosphate fertilizer (BC-30+P). The treatments BC-30 and BC-30+P significantly increased the contents of humic materials (humic and fulvic acids) as compared to CK. There was a significant increase in the mean-weight diameter of soil aggregates by 3- and 4-fold in BC-30 and BC-30+P, respectively. Similarly, BC-30 and BC-30+P led to significant increases in soil structural coefficient by 3- and 4-fold, respectively, relative to CK. Significant increases in organic C and N accumulation were observed in the macroaggregates of the biochar-amended soils. Inverse relationships between the degree of polymerization and aggregate-protected C and N were observed, implying that low-molecular-weight aliphatic compounds favor organic C and N accumulation with biochar amendments. The important soil property that contributed to organic C and N accumulation in aggregates was fulvic acid content, which could be used as an early and sensitive indicator to notice early changes in aggregate-protected C and N accumulation in soils of the humid tropics.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 6","pages":"Pages 1086-1099"},"PeriodicalIF":5.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44661151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Biological nitrogen fixation in paddy soils is driven by multiple edaphic factors and available phosphorus is the greatest contributor 水稻土壤的生物固氮是由多种土壤因子驱动的,速效磷是其中最大的贡献者
IF 5.2 2区 农林科学
Pedosphere Pub Date : 2024-12-01 DOI: 10.1016/j.pedsph.2023.09.002
Tianlong HU , Yanhui ZHANG , Hui WANG , Haiyang JIN , Benjuan LIU , Zhibin LIN , Jing MA , Xiaojie WANG , Qi LIU , Hongtao LIU , Zhe CHEN , Rong ZHOU , Penghui JIN , Jianguo ZHU , Gang LIU , Qicheng BEI , Xingwu LIN , Zubin XIE
{"title":"Biological nitrogen fixation in paddy soils is driven by multiple edaphic factors and available phosphorus is the greatest contributor","authors":"Tianlong HU ,&nbsp;Yanhui ZHANG ,&nbsp;Hui WANG ,&nbsp;Haiyang JIN ,&nbsp;Benjuan LIU ,&nbsp;Zhibin LIN ,&nbsp;Jing MA ,&nbsp;Xiaojie WANG ,&nbsp;Qi LIU ,&nbsp;Hongtao LIU ,&nbsp;Zhe CHEN ,&nbsp;Rong ZHOU ,&nbsp;Penghui JIN ,&nbsp;Jianguo ZHU ,&nbsp;Gang LIU ,&nbsp;Qicheng BEI ,&nbsp;Xingwu LIN ,&nbsp;Zubin XIE","doi":"10.1016/j.pedsph.2023.09.002","DOIUrl":"10.1016/j.pedsph.2023.09.002","url":null,"abstract":"<div><div>Biological nitrogen (N) fixation (BNF) is important for sustainable rice cultivation. Various edaphic factors have been individually evaluated for their effects on BNF in paddy soils. However, no single factor could fully explain the different soil outcomes. Paddy BNF is more likely to be simultaneously influenced to various degrees by combinations of several edaphic factors; however, the relative importance of the interaction of multiple edaphic factors on the regulation of BNF in paddy soils is still unclear. Twenty-seven paddy soil samples with different soil properties were collected from the major rice cropping areas in Southwest and Northeast China to determine the edaphic factors affecting paddy BNF amount. Rice was transplanted into pots filled with paddy soils and grown in a <sup>15</sup>N<sub>2</sub>-enriched airtight chamber. Estimation of BNF was based on the measurements of <sup>15</sup>N enrichment in the paddy soils and rice plants at the end of a 77-d incubation period. The BNF amounts ranged from 0.66 to 12.3 kg ha<sup>-1</sup>, with a significant positive relationship with available phosphorus (AP) and significant quadratic relationships with available molybdenum (AMo) and total N (TN). Available P explained 42% of the observed variation in BNF, TN explained 17%, and AMo explained 13%. The specific interaction between soil cation exchange capacity and available soil N (as determined by rice N uptake) accounted for 28% of the variation in BNF. The BNF amount was decreased when AP was &lt; 14 mg kg<sup>-1</sup>, AMo &lt; 0.09 mg kg<sup>-1</sup>, or TN was &gt; 3.2 g kg<sup>-1</sup>. These results provide valuable benchmarks that could be used to guide farmers in managing paddy soils to improve the potential contribution of paddy BNF to soil fertility.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 6","pages":"Pages 993-1001"},"PeriodicalIF":5.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46666972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mitigating effects of various phosphorus sources on arsenic toxicity under anaerobic conditions for rice and aerobic conditions for sunflower and maize plants 不同磷源对水稻厌氧及向日葵和玉米好氧条件下砷毒性的缓解作用
IF 5.2 2区 农林科学
Pedosphere Pub Date : 2024-12-01 DOI: 10.1016/j.pedsph.2023.07.002
Mehmet B. TASKIN , Hanife AKCA , Selver KAN , Havva TASKIN , Saima K. BABAR , Yusuf K. KADIOGLU , Kiymet DENIZ , Aydin GUNES
{"title":"Mitigating effects of various phosphorus sources on arsenic toxicity under anaerobic conditions for rice and aerobic conditions for sunflower and maize plants","authors":"Mehmet B. TASKIN ,&nbsp;Hanife AKCA ,&nbsp;Selver KAN ,&nbsp;Havva TASKIN ,&nbsp;Saima K. BABAR ,&nbsp;Yusuf K. KADIOGLU ,&nbsp;Kiymet DENIZ ,&nbsp;Aydin GUNES","doi":"10.1016/j.pedsph.2023.07.002","DOIUrl":"10.1016/j.pedsph.2023.07.002","url":null,"abstract":"<div><div>Arsenic (As) contamination is one of the major factors that contribute to environmental pollution, and it plays havoc with sustainability of crop production. Nano-hydroxyapatite (nHAP) can be an effective phosphorus (P) source to cope with As toxicity. The mitigating effects of variable P sources on As toxicity in rice, sunflower, and maize grown in an alkaline soil were evaluated. Arsenic was applied at 0 and 20 mg kg<sup>-1</sup>, and P was applied at 0, 50, and 500 mg kg<sup>-1</sup> in the forms of triple superphosphate (TSP) and nHAP. In addition, the same amount of phosphoric acid was also used in the sunflower and maize experiments with the other P sources. The structural and functional properties of nHAP were determined by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Stunted growth was observed in rice, and less in sunflower; maize remained unaffected by As toxicity. In the presence of As, TSP and nHAP at their high doses (500 mg kg<sup>-1</sup>) significantly increased the rice dry weight compared with the control (0 mg kg<sup>-1</sup>). The As concentration in rice was decreased by approximately 25% in the presence of 50 mg kg<sup>-1</sup> TSP and 500 mg kg<sup>-1</sup> nHAP. The P treatments had no significant effect on the As concentration in sunflower, whereas the As concentration in maize was increased by 500 mg kg<sup>-1</sup> TSP. In the absence and presence of As, nHAP at 50 mg kg<sup>-1</sup> significantly increased rice P concentration, whereas in the presence of As, 500 mg kg<sup>-1</sup> TSP significantly increased P concentration in rice compared with the control. Arsenic had no significant effect on sunflower P concentration, while the maize P concentration was decreased in the 0 mg kg<sup>-1</sup> P treatment. It can be concluded that TSP and nHAP were effective in alleviating As toxicity in rice and sunflower. Comparative studies are further needed to determine the long-term effects of TSP and nHAP on prevention of As toxicity in field conditions.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 6","pages":"Pages 1146-1157"},"PeriodicalIF":5.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48022832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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