Pedosphere最新文献

{"title":"Biochar addition affects soil carbon stock by altering keystone fungal species and necromass abundance and oxidase activities in forest and paddy soils","authors":"Leiyi ZHANG ,&nbsp;Yingxin WU ,&nbsp;Jie ZHANG ,&nbsp;Kumuduni Niroshika PALANSOORIYA ,&nbsp;Chao LIU ,&nbsp;Rahat SHABIR ,&nbsp;Yao HUANG ,&nbsp;Qianying SUN ,&nbsp;Wencheng WU ,&nbsp;Scott X. CHANG","doi":"10.1016/j.pedsph.2024.06.007","DOIUrl":"10.1016/j.pedsph.2024.06.007","url":null,"abstract":"<div><div>Fungi play a crucial role in the utilization and storage of soil organic carbon (SOC). Biochars can potentially influence soil carbon (C) turnover by mediating extracellular electron transfer, which can be facilitated by fungi. However, the effects of biochar and soil type on the community, abundance, enzyme secretion, and necromass of fungi mediating SOC storage remain unclear. A mesocosm incubation experiment was conducted using forest and paddy soils from southern China to study the impact of biochars pyrolyzed at low (300°C, BL) and high (700°C, BH) temperatures on fungal abundance, community composition, necromass abundance, and C-degrading enzyme activities. The SOC retention ratio was higher under BL (84.0%) than under BH (76.3%). Addition of BL increased fungal abundance in the forest soil by 230%. In contrast, addition of BH decreased fungal abundance in the paddy soil by 20.8%. Biochar addition affected fungal necromass accumulation and oxidase activity and regulated SOC turnover. The high available C content and moderate liming effect of BL significantly increased fungal abundance and necromass abundance in the forest soil compared to the paddy soil. Moreover, after 16 weeks of incubation, BL addition decreased peroxidase activity by 32.1% in the forest soil due to the higher C use efficiency of fungi (<em>i.e</em>., the enrichment of <em>Talaromyces</em>, <em>Umbelopsis</em>, and <em>Trichoderma</em>), decreasing C-degrading enzyme secretion and reducing SOC degradation compared to the paddy soil. However, BH addition increased the <em>Fusarium</em> abundance, which regulated the polyphenol oxidase activity and promoted SOC degradation in the paddy soil. We concluded that biochars could alter the soil environment and extracellular electron transfer to mediate fungal necromass content and C-degrading enzyme activities, thus affecting SOC storage in the forest and paddy soils.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 4","pages":"Pages 690-705"},"PeriodicalIF":5.2,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141416344","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}

{"title":"Rice-fish coculture without phosphorus addition improves phosphorus availability in paddy soil by regulating phosphorus fraction partitioning and alkaline phosphomonoesterase-encoding bacterial community","authors":"Xing LIU ,&nbsp;Yuting CHEN ,&nbsp;Hongjun ZHENG ,&nbsp;Daolin SUN ,&nbsp;Jiaen ZHANG ,&nbsp;Qi JIA ,&nbsp;Qi CHEN","doi":"10.1016/j.pedsph.2024.06.002","DOIUrl":"10.1016/j.pedsph.2024.06.002","url":null,"abstract":"<div><div>Rice-fish coculture (RFC) has aroused extensive concern for its contribution to food security and resource conservation, but whether it can improve soil phosphorus (P) availability and affect microbe-mediated P turnover remains elusive. Herein, we conducted a microcosm experiment to assess the impacts of RFC combined with (50 mg P kg^-1 as KH₂PO₄) and without inorganic P addition on P fractions, P availability, and <em>phoD</em>-harboring bacterial community composition. The results revealed that RFC without P addition significantly improved P availability and phosphatase activity in paddy soil, while soil available P (AP), pH, and microbial biomass P (MBP) contributed to regulating P fractions. Moreover, the <em>phoD</em>-harboring bacterial abundance was linked to phosphatase activity, AP, total carbon (TC), and total P (TP) contents, and the ratios of TC to total nitrogen (TN) and TN to TP. We also found that the keystone taxa of <em>phoD</em>-harboring bacteria contributed to phosphatase production as well as organic P mineralization, thereby improving P availability. Our findings suggest that RFC without P addition is beneficial for promoting the expression of <em>phoD</em>-harboring bacterial functions to improve the capacity of P mineralization. Overall, our study provides insights into the responses of <em>phoD</em>-harboring bacterial functions for P turnover to RFC combined with and without P addition, showing the potential utilization of P resources in agricultural soil and the contribution of phosphatase activity to P acquisition in agriculture ecosystem.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 4","pages":"Pages 715-727"},"PeriodicalIF":5.2,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141396866","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}

{"title":"Plane (Platanus orientalis L.) leaf biochar improves wettability of a silty clay soil irrigated with saline water","authors":"Vajiheh DOROSTKAR ,&nbsp;Fatemeh Zahra ARABAMERI","doi":"10.1016/j.pedsph.2024.06.001","DOIUrl":"10.1016/j.pedsph.2024.06.001","url":null,"abstract":"<div><div>The wettability of coarse-grained soils has been studied previously. However, soil drying in arid regions due to limited precipitation or irrigation has resulted in soil water repellency to some extent in fine-grained soils. In this study, laboratory experiments were conducted to investigate the effects of plane (<em>Platanus orientalis</em> L.) leaf biochar with fine (&lt; 0.1 mm) and coarse grains (0.1–0.5 mm) on the wettability of a silty clay soil irrigated with saline and non-saline water. Eleven rates of each biochar, ranging from 0 to 10% with 1% intervals, were investigated along with five ionic strengths of water, including 0, 0.2, 0.4, 0.6, and 0.8 mol L^-1, prepared using sodium and calcium chloride, which are two dominant salts in arid regions. The results showed that application of 5%–10% fine-grained biochar changed the soil hydrophobicity class from strongly to slightly water-repellent, while only 4% coarse-grained biochar was sufficient for the same change in soil wettability. Furthermore, the use of 10% coarse-grained biochar made the soil hydrophilic. The positive effect of plane leaf biochar on soil water repellency reduction was limited by water salinity. The sodium chloride solution was more effective in decreasing the soil wettability than calcium chloride solution and increased the demand for biochar for soil water repellency reduction. In conclusion, plane leaf biochar could be beneficial in managing the hydrophobicity of fine-grained soils. However, water quality as well as biochar particle size determined the quantity of biochar required for improving soil wettability.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 4","pages":"Pages 775-782"},"PeriodicalIF":5.2,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141396674","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}

{"title":"Five-year controlled-release/stable nitrogen fertilization reduces field nitrogen loss without increasing carbon dioxide emissions in a vegetable rotation system","authors":"Fangli WANG ,&nbsp;Zhi LI ,&nbsp;Dan ZHENG ,&nbsp;Shangqiang LIAO ,&nbsp;Xi ZHANG ,&nbsp;Zihan YU ,&nbsp;Jun LIU ,&nbsp;Haiying ZONG ,&nbsp;Xuexia WANG ,&nbsp;Ningning SONG","doi":"10.1016/j.pedsph.2024.06.003","DOIUrl":"10.1016/j.pedsph.2024.06.003","url":null,"abstract":"<div><div>Controlled-release/stable nitrogen (N) fertilizers can improve vegetable yields and achieve lower greenhouse gas emissions, resulting in cost-effective and environmentally friendly vegetable production. However, there has been limited research on the controlled-release/stable N fertilization in long-term fixed-position vegetable rotation fields. In this study, a five-year field experiment was conducted to examine the effects of long-term controlled-release/stable N fertilization in reducing greenhouse gas emissions and increasing lettuce yield. Six distinct treatments were employed for N fertilization: the control without N fertilizer (CK), normal local farming practices with application of urea fertilizer at 400 kg N ha^-1 (T1), optimized application of urea at 320 kg N ha^-1 (T2), optimized application of urea at 320 kg N ha^-1 with supplementation of 1.0 kg ha^-1 3,4-dimethylpyrazole phosphate (DMPP) as N inhibitor (T3), application of polyurethane-coated urea at 320 kg N ha^-1 (T4), and application of polyurethane-coated urea at 320 kg N ha^-1 with supplementation of 1.0 kg ha^-1 DMPP (T5). The results showed that the T3, T4, and T5 treatments using controlled-release/stable N fertilization emitted about 12.2%–56.7% less average annual cumulative nitrous oxide (N₂O) and 1.31%–10.0% less carbon dioxide (CO₂) than the T2 treatment. Nitrous oxide and CO₂ emissions from the T4 and T5 treatments were considerably lower than those from the T3 treatment. No significant seasonal or interannual variability was observed in N₂O and CO₂ emissions. The observed phenomena were attributed to the fluctuations in soil ammonium- and nitrate-N contents. The findings in this study revealed that long-term controlled-release/stable N fertilization resulted in reduced field N loss, benefitting vegetable yields without increasing CO₂ emissions and highlighting the application potential of this technique for sustainable agricultural production.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 4","pages":"Pages 741-750"},"PeriodicalIF":5.2,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141407974","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}

{"title":"Rhizosphere microbes influence wogonoside accumulation in perennial Scutellaria baicalensis","authors":"Yang SUN ,&nbsp;Hong LIU ,&nbsp;Junwei PENG ,&nbsp;Minchong SHEN ,&nbsp;Yang HU ,&nbsp;Dongsheng YU ,&nbsp;Jiangang LI ,&nbsp;Yuanhua DONG","doi":"10.1016/j.pedsph.2023.04.008","DOIUrl":"10.1016/j.pedsph.2023.04.008","url":null,"abstract":"<div><p>Dried roots of <em>Scutellaria baicalensis</em> Georgi are an acclaimed traditional Chinese medicine, and wogonoside content is a key indicator used to evaluate <em>S. baicalensis</em> quality. Rather than rising linearly with cultivation years, <em>S. baicalensis</em> quality initially increases and then declines. However, little is known regarding the dynamic variations in <em>S. baicalensis</em> rhizosphere microorganisms under long-term cultivation and underlying mechanisms of their effects on wogonoside formation and accumulation. The aim of this study was to investigate the roles of soil nutrients and rhizosphere microbes on <em>S. baicalensis</em> quality across different cultivation years (1–4 years). The wogonoside content (25.14 mg g^-1) was highest in the biennial <em>S. baicalensis</em> and then decreased following long-term cultivation. Most soil nutrients (available nitrogen, available phosphorus, available iron, available manganese, and available zinc) were reduced significantly as cultivation years increased. Time also affected rhizosphere bacterial community structure significantly, driving it toward deterministic process (<em>i.e</em>., β-nearest taxon index &lt; -2). Available manganese and exchangeable calcium indirectly affected wogonoside formation and accumulation. Wogonoside inhibition was driven by the reduction in rhizosphere bacterial diversity, which significantly increased the relative abundance of beta-glucosidase and decreased the relative abundance of phenylalanine ammonialyase. The rhizosphere microenvironment was altered under long-term cultivation, thereby shaping rhizosphere bacterial community, reducing the community diversity, and ultimately inhibiting wogonoside formation and accumulation. Our findings may aid in understanding of the mechanisms and reasons for the reduction in <em>S. baicalensis</em> quality under long-term cultivation from the perspective of soil nutrients and microorganisms, which may theoretically support the future artificial cultivation and management of Chinese medicinal plants.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 553-566"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48002267","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}

{"title":"A perspective on greenhouse gas emission studies integrating arbuscular mycorrhiza","authors":"Stavros D. VERESOGLOU,&nbsp;Junjiang CHEN","doi":"10.1016/j.pedsph.2023.01.001","DOIUrl":"10.1016/j.pedsph.2023.01.001","url":null,"abstract":"<div><p>Climate change is a global emergency. It is only possible to pace down global change through addressing the triggers of it, greenhouse gas emissions. Despite commendable progress, we think that there is plenty of room to further make the studies addressing global change realistic, through integrating into them biotic interactions. We make a case for this statement through a bibliometrics analysis on agricultural studies exploring greenhouse gas emissions that consider arbuscular mycorrhiza. We show that even though mycorrhizal studies account right now for a small fraction of the agricultural literature, they get cited more often. We further demonstrate that mycorrhizal studies are typically more descriptive in their nature, which we support through comparing the keywords they list. We subsequently use the opportunity to identify shortcomings and opportunities to further integrate mycorrhiza into agricultural studies assaying greenhouse gas emissions. We finally make a call to better integrate arbuscular mycorrhiza into global change studies.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 525-529"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49179379","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}

{"title":"Phytoremediation capacity of the hyperaccumulator Solanum nigrum L. and Solanum lycopersicum L. cultivars at the flowering stage in cadmium-polluted soil","authors":"Jibao JIA ,&nbsp;Huiping DAI ,&nbsp;Shuhe WEI ,&nbsp;Lidia SKUZA ,&nbsp;Jianming XUE ,&nbsp;Rong LI ,&nbsp;Quan SUN","doi":"10.1016/j.pedsph.2023.03.001","DOIUrl":"10.1016/j.pedsph.2023.03.001","url":null,"abstract":"","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 676-680"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43021498","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}

{"title":"Corrigendum to “Incorporation of source contributions to improve the accuracy of soil heavy metal mapping using small sample sizes at a county scale” (Pedosphere. 34(1): 170–180, 2024)","authors":"Jie SONG ,&nbsp;Xin WANG ,&nbsp;Dongsheng YU ,&nbsp;Jiangang LI ,&nbsp;Yanhe ZHAO ,&nbsp;Siwei WANG ,&nbsp;Lixia MA","doi":"10.1016/S1002-0160(24)00055-9","DOIUrl":"https://doi.org/10.1016/S1002-0160(24)00055-9","url":null,"abstract":"","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Page 651"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1002016024000559/pdfft?md5=f4578c299baba269348411e00c960687&pid=1-s2.0-S1002016024000559-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141325287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heavy metals potentially drive co-selection of antibiotic resistance genes by shifting soil bacterial communities in paddy soils along the middle and lower Yangtze River","authors":"Ya ZHANG ,&nbsp;Hao WANG ,&nbsp;Minghui HU ,&nbsp;Rui CAI ,&nbsp;Yuqing MIAO ,&nbsp;Xiancan ZHU","doi":"10.1016/j.pedsph.2023.01.012","DOIUrl":"10.1016/j.pedsph.2023.01.012","url":null,"abstract":"<div><p>Heavy metals (HMs) and antibiotic resistance have become serious environmental problems affecting soil and human health. Soil microorganisms play key roles in pollutant degradation and biogeochemical cycling processes; however, the interactions among HMs, soil microbial communities, and antibiotic resistance genes (ARGs) in agricultural soils remain unclear. Using quantitative real-time polymerase chain reaction and NovaSeq sequencing, we evaluated heavy metal contents, abundances of ARGs, soil bacterial community structure and functions, and their correlations in paddy soils at 43 sampling sites along the middle and lower reaches of the Yangtze River, central and eastern China. Our results showed the co-occurrence of HMs, ARGs, and HM resistance genes across all paddy soils. Additionally, significant positive associations were detected between HMs and resistance genes. Cadmium, <em>czcA</em>, and <em>int1</em> were positively correlated with bacterial community diversity. The Mantel test showed that bacterial community composition and functions were significantly associated with HMs and resistance genes, such as Cd, Cr, Zn, <em>copA</em>, <em>czcA</em>, <em>int1</em>, and <em>sul1</em>. Moreover, HMs and ARGs were the major factors shaping soil bacterial communities; thus, HMs triggered proliferation of HM and antibiotic resistances by influencing the mobile genetic element (<em>int1</em>) and soil microbial communities. Our study revealed that HMs potentially drive the co-selection of ARGs by shifting soil bacterial community structure and functions, thereby increasing the potential risks to human health as well as ecological environment in the paddy soils along the middle and lower reaches of the Yangtze River.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 606-619"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42099866","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}

{"title":"Increasing phosphorus fertilizer value of recycled iron phosphates by prolonged flooding and organic matter addition","authors":"Rochelle Joie SARACANLAO ,&nbsp;Hannah VAN RYCKEL ,&nbsp;Mieke VERBEECK ,&nbsp;Maarten EVERAERT ,&nbsp;Erik SMOLDERS","doi":"10.1016/j.pedsph.2023.03.020","DOIUrl":"10.1016/j.pedsph.2023.03.020","url":null,"abstract":"<div><p>Iron (Fe) minerals are commonly used to remove phosphorus (P) from waste streams, producing P-loaded Fe(III) oxides or Fe(II) phosphate minerals (<em>e.g</em>., vivianite). These minerals may be used as fertilizers to enhance P circularity if solubilized in soil. Here, we tested the P fertilizer value of recycled Fe phosphates (FePs) in a pot trial and in an incubation experiment, hypothesizing that P release from FePs is possible under Fe(III)-reducing conditions. First, a pot trial was set up with rice (<em>Oryza sativa</em>) in all combinations of soil flooding or not, three P-deficient soils (acid, neutral, and calcareous), and six FePs (three Fe(III)Ps and three Fe(II)Ps) referenced to triple superphosphate (TSP) or zero amendments. Shoot P uptake responded to TSP application in all treatments but only marginally to FePs. The redox potential did not decrease to -200 mV by flooding for a brief period (13 d) during the pot trial. A longer incubation experiment (60 d) was performed, including a treatment of glutamate addition to stimulate reductive conditions, and P availability was assessed with CaCl₂ extraction of soils. Glutamate addition and/or longer incubation lowered soil redox potential to &lt; -100 mV. On the longer term, Fe(III) minerals released P, and adequate P was reached in the calcareous soil and in the neutral soil amended with Fe(III)P-sludge. It can be concluded that prolonged soil flooding and organic matter addition can enhance the P fertilizer efficiency of FePs. Additionally, application of FeP in powder form may enhance P availability.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 631-640"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42982781","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}