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Abiotic and biotic drivers of struvite solubilization in contrasting soils

Pedosphere 2023年第6期33卷 828-837页

作者： Antonio RUIZ-NAVARRO manuel delgado-baquerizo Concha CANO-DíAZ Carlos GARCíA Felipe BASTIDA Centro de Edafologia y Biologia Aplicada del Segura Consejo Superior de Investigaciones Cientificas(CEBAS-CSIC)Department of Soil and Water ConservationEspinardoMurcia E-30100Spain ICL Specialty Fertilizers Iberia TotanaMurcia E-30850Spain Laboratorio de Biodiversidad y Funcionamiento Ecosistemico Instituto de Recursos Naturales y Agrobiologia de Sevilla(IRNAS)CSICAv.Reina Mercedes 10Sevilla E-41012Spain IRNAS-CSIC Unidad Asociada Universidad Pablo de OlavideUniversidad Pablo de Olavide(UPO)Sevilla 41013Spain Centre for Research and Development in Agrifood Systems and Sustainability(CISAS) Instituto Politecnico de Viana do Castelo(IPVC)Rua Escola Industrial e Comercial Nun'Alvares 34Viana do Castelo 4900-347Portugal

Phosphorus(P) limitation in the coming decades calls for the utilization of alternative fertilizers in agriculture. Struvite is a promising P source, but its potential role as a fertilizer is dependent on different physical, chemical, and biological properties, which are very heterogeneous in soil, complicating the prediction of the best soil conditions for its application. Here, we evaluated the solubility of struvite in soil, its redistribution into P fractions, and its potential abiotic and biotic drivers in 62 globally distributed soils with contrasting properties through an incubation assay. We found that after 40 d, about 35% of struvite P was redistributed into soil fractions more accessible to plants and microbes. Phosphorus redistribution from struvite was driven by a complex suite of soil physical, chemical, and microbial properties as well as environmental factors that varied across soils. Soil texture played a critical role in determining the redistribution of P in struvite-amended soils in soluble(H2O extraction), labile(NaHCO3 extraction), and moderately labile(NaOH extraction) fractions.In addition, the soil solution cation concentration was one of the most important drivers of available struvite-derived P fractions. The great importance of texture and cations in determining struvite-derived P fractions in soil was contrasted with the relatively minor role of pH. At the microbial level, the number of bacterial operational taxonomic units(OTUs) from the unfertilized soils that correlated with struvite-derived P fractions was higher than that of fungi. The number of OTUs that correlated with the struvite-derived soluble P fraction was dominated by fungi, whereas the number of OTUs that correlated with the struvite-derived labile P fraction was dominated by bacteria. Overall, this study provided a predictive framework for the potential use of struvite as a P fertilizer in contrasting soils.

关键词： bacteria fungi environmental factor operational taxonomic unit phosphorus fertilizer phosphorus fraction phosphorus solubilization soil fertility soil property

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Responses of Soil Bacterial Diversity to Fertilization are Driven by Local Environmental Context Across China

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Engineering 2022年第5期8卷 164-170页

作者： Youzhi Feng manuel delgado-baquerizo Yongguan Zhu Xiaozeng Han Xiaori Han Xiuli Xin Wei Li Zhibing Guo Tinghui Dang Chenhua Li Bo Zhu Zejiang Cai Daming Li Jiabao Zhang State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Department of Physical Chemicaland Natural SystemsPablo de Olavide UniversitySevilla 41013Spain State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China National Observation Station of the Hailun Agroecology System Key Laboratory of Mollisols AgroecologyNortheast Institute of Geography and AgroecologyChinese Academy of SciencesHarbin 130102China College of Land and Environment National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer ResourcesShenyang Agricultural UniversityShenyang 110866China Crop Research Institute Anhui Academy of Agricultural SciencesHefei 230001China Soil and Fertilizer Research Institute Anhui Academy of Agricultural SciencesHefei 230001China Institute of Soil and Water Conservation Northwest A&F UniversityChinese Academy of Science&Ministry of Water ResourcesYangling 712100China Fukang Station of Desert Ecology Key Laboratory of Oasis Ecology and Desert EnvironmentXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Key Laboratory of Mountain Environment Evolvement and Regulation Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Qiyang Agroecosystem of the National Field Experimental Station Yongzhou 426199China National Engineering Laboratory for Improving the Quality of Arable Land Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Jiangxi Institute of Red Soil Nanchang 331717China

Soil microbial diversity is extremely vulnerable to fertilization,which is one of the main anthropogenic activities associated with global changes.Yet we know little about how and why soil microbial diversity responds to fertilization across contrasting local ecological contexts.This knowledge is fundamental for predicting changes in soil microbial diversity in response to ongoing global changes.We analyzed soils from ten 20-year field fertilization(organic and/or inorganic)experiments across China and found that the national-scale responses of soil bacterial diversity to fertilization are dependent on ecological context.In acidic soils from regions with high precipitation and soil fertility,inorganic fertilization can result in further acidification,resulting in negative impacts on soil bacterial diversity.In comparison,organic fer-tilization causes a smaller disturbance to soil bacterial diversity.Despite the overall role of environmental contexts in driving soil microbial diversity,a small group of bacterial taxa were found to respond to fer-tilization in a consistent way across contrasting regions throughout China.Taxa such as Nitrosospira and Nitrososphaera,which benefit from nitrogen fertilizer addition,as well as Chitinophagaceae,Bacilli,and phototrophic bacteria,which respond positively to organic fertilization,could be used as bioindicators for soil fertility in response to fertilization at the national scale.Overall,our work provides new insights into the importance of local environmental context in determining the responses of soil microbial diver-sity to fertilization,and identifies regions with acidic soils wherein soil microbial diversity is more vul-nerable to fertilization at the national scale.

关键词： Nutrient addition Anthropogenic activity Biodiversity Soil pH

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稻虾综合种养模式对土壤生物多样性和多重功能的影响

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Science Bulletin 2023年第20期68卷 2311-2315,M0004页

作者：冯娇潘荣胡行伟黄巧云郑娇莉谭文峰刘玉荣 manuel delgado-baquerizo National Key Laboratory of Agricultural Microbiology Huazhong Agricultural UniversityWuhan 430070China College of Resources and Environment Huazhong Agricultural UniversityWuhan 430070China Faculty of Veterinary and Agricultural Sciences The University of MelbourneMelbourne VIC 3010Australia Biopesticide Engineering Research Center Hubei Academy of Agricultural SciencesWuhan 430070China Hubei Key Laboratory of Soil Environment and Pollution Remediation Huazhong Agricultural UniversityWuhan 430070China Instituto de Recursos Naturales y Agrobiología de Sevilla(IRNAS) Consejo Superior de Investigaciones CientíficasSevilla E-41012Spain

将水产养殖与农业种植相结合(稻渔综合种养)是提高农产品产量、推动农业绿色发展的重要途径.然而,稻渔综合种养对多营养级土壤生物多样性和多重功能的影响仍然未知.通过对中国19个地区(~1300 km跨度)的131个农田(包含水稻单作和稻虾综... 详细信息

将水产养殖与农业种植相结合(稻渔综合种养)是提高农产品产量、推动农业绿色发展的重要途径.然而,稻渔综合种养对多营养级土壤生物多样性和多重功能的影响仍然未知.通过对中国19个地区(~1300 km跨度)的131个农田(包含水稻单作和稻虾综合种养)进行野外调查发现,与水稻单作相比,稻虾综合种养导致土壤多营养级生物多样性(如真菌vs.无脊椎动物)和生态系统多重服务功能(如支持vs.调节服务)的权衡.本研究为综合评估稻虾综合种养的经济和环境效益提供了新的见解,呼吁在区域范围内合理布局水稻单作和稻虾综合种养面积以优化农田多重生态系统服务功能.

关键词：农产品产量水产养殖营养级农业种植综合种养生态系统多重功能生物多样性

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Association between lifestyle factors and thyroid function in young euthyroid adults

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Food Science and Human Wellness 2024年第1期13卷 265-275页

作者： Elisa Merchan-Ramirez Guillermo Sanchez-delgado Lucas Jurado-Fasoli Francisco M Acosta manuel Munoz-Torres Jose M.Llamas-Elvira Jonatan R Ruiz Sport and Health University Research Institute(iMUDS) Faculty of Sports ScienceUniversity of GranadaGranada 18016Spain Pennington Biomedical Research Center Baton Rouge 70808USA Faculty of Medicine University of GranadaGranada 18071Spain Turku PET Centre University of TurkuTurku 20500Finland Turku PET Centre Turku University HospitalTurku 20520Finland Biosanitary Research Institute of Granada(Ibs.Granada) Granada 18012Spain CIBERFES Instituto de Salud CarlosⅢMadrid 28029Spain Endocrinology and Nutrition Service University Hospital San CecilioGranada 18016Spain Nuclear Medicine Service "Virgen de las Nieves"University HospitalGranada 18014Spain

Purpose:The present work examines the associations of dietary habits,sedentarism,physical activity(PA)levels and sleep habits,with thyroid function in young euthyroid adults.Methods:A total of 105 young euthyroid adults participated in this cross-sectional study.Thyroid function was determined in fasting conditions(>6 h).Dietary habits were measured by a food frequency questionnaire and three non-consecutive 24 h recalls,and different dietary intake and patterns were then estimated.The time spent in sedentary,PA levels and sleep habits were objectively measured using a wrist-worn accelerometer.Results:Energy and carbohydrate intake were positively associated with thyroid stimulating hormone(TSH)(β=0.222;R^(2)=0.102;P=0.022 andβ=0.425;R^(2)=0.129;P=0.007,respectively)whereas fat intake was negatively associated with TSH(β=-0.428;R^(2)=0.137;P=0.004).Energy intake was also positively associated with free triiodothyronine(β=0.277;R^(2)=0.137;P=0.004).Further,adherence to the Mediterranean diet was negatively related to TSH and free thyroxine(FT4)(β=-0.221;R^(2)=0.113;P=0.020 andβ=-0.268;R^(2)=0.071;P=0.007,respectively).Vigorous-intensity and overall PA were negatively associated with FT4(β=-0.227;R^(2)=0.052;P=0.022 andβ=-0.204;R^(2)=0.042;P=0.041,respectively).In contrast,no associations were found between sleep parameters and thyroid function.Conclusions:Lifestyle factors such as dietary intake and PA levels seems to be related to thyroid function even in young euthyroid adults.

关键词： Thyroid hormones Dietary intake Sleep Physical activity Euthyroid

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树种菌根类型通过细根生物量和凋落物动态影响土壤呼吸和土壤碳储存

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Journal of Plant Ecology 2023年第1期16卷 229-240页

作者： Guodong Zhang Guiyao Zhou Xuhui Zhou Lingyan Zhou Junjiong Shao Ruiqiang Liu Jing Gao Yanghui He Zhenggang Du Jianwei Tang manuel delgado-baquerizo Coastal Ecosystems Research Station of Yangtze River Estuary Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringInstitute of Biodiversity ScienceFudan UniversityShanghai 200433China Tiantong National Field Observation Station for Forest Ecosystem Center for Global Change and Ecological ForecastingSchool of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China Northeast Asia ecosystem Carbon sink research Center(NACC) Center for Ecological ResearchKey Laboratory of Sustainable Forest Ecosystem Management-Ministry of EducationSchool of ForestryNortheast Forestry UniversityHarbin 150040China Xishuangbanna Tropical Botanical Garden Chinese Academy of SciencesMenglaYunnan 666303China Laboratorio de Biodiversidad y Funcionamiento Ecosistémico Instituto de Recursos Naturales y Agrobiología de Sevilla(IRNAS)CSICAv.Reina Mercedes 10E-41012 SevillaSpain

热带森林是高生产力但同时也是脆弱的生态系统之一。一些全球范围的造林项目计划未来十年在热带地区种植数百万棵树。树种菌根类型影响森林土壤碳储存已成为共识,但在热带地区,树种菌根类型如何影响土壤呼吸(Rs)和碳储存,目前仍知之甚... 详细信息

热带森林是高生产力但同时也是脆弱的生态系统之一。一些全球范围的造林项目计划未来十年在热带地区种植数百万棵树。树种菌根类型影响森林土壤碳储存已成为共识,但在热带地区,树种菌根类型如何影响土壤呼吸(Rs)和碳储存,目前仍知之甚少。为研究树种菌根类型对Rs和土壤碳储存的影响,本实验在一个近30年热带同质园的3种丛枝菌根(AM)树种和3种外生菌根(EM)树种的单种林中,测量了其Rs和表层20 cm的碳含量,以及有关的生物因子(如根生物量、凋落物动态、土壤微生物)和非生物因子(如微气候)。研究结果表明,AM单种林的Rs、土壤碳含量,以及凋落物周转速率和细根生物量显著高于EM单种林。分析表明,与其他生物和非生物因子比较,树种菌根类型对Rs和土壤碳含量的影响最大。进一步分析表明,菌根类型是通过细根生物量和凋落物动态(凋落物产量、凋落物现存量、凋落物周转速率)直接和间接影响Rs和土壤碳含量。本研究结果强调了树种菌根类型对森林碳循环的影响,表明在热带地区种植AM树种可能比种植EM树种更能促进土壤固碳。

关键词：菌根土壤呼吸热带森林碳储存造林

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Contrasting effects of N fertilization and mowing on ecosystem multifunctionality in a meadow steppe

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Soil Ecology Letters 2020年第4期2卷 268-280页

作者： Haiying Cui Wei Sun manuel delgado-baquerizo Wenzheng Song Jian-Ying Ma Keying Wang Xiaoli Ling Key Laboratory of Vegetation Ecology of Ministry of Education Institute of Grassland ScienceSchool of Life ScienceNortheast Normal UniversityChangchun 130024China Departamento de Sistemas Fisicos Químicos y NaturalesUniversidad Pablo de OlavideCarretera de Utrera Km.141013 SevillaSpain Key Laboratory of Biogeography and Bioresource in Arid Land Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China

There is little experimental field evidence on how multiple essential land use intensification drivers(LUIDs),such as nitrogen(N)fertilization and mowing,interact to control ecosystem multifunctionality.Here,we conducted a 4-year field experiment in a meadow steppe in northeast China and evaluated the direct and indirect effects of mowing and N fertilization on a range of ecosystemfunctions associated with nutrient cycle,carbon stocks,and organic matter decomposition during the past 2 years of the experiment(2017 and 2018).Mowing had negative effects on the ecosystem multifunctionality index(EMF),carbon(C)cycle multifunctionality index(CCMF),and N cycle multifunctionality index(NCMF)in 2 years of sampling.However,in general,the responses of multifunctionality to N fertilization were ratespecific and year-dependent.N fertilization had positive effects on EMF,CCMF,NCMF,and phosphorus(P)cycle multifunctionality index(PCMF)in 2017,with the higher precipitation rate during the growing season,which was likely associated with the strong monsoon season.However,in 2018,EMF,CCMF,and NCMF increased at the lower N fertilization levels(£10 g N m^(-2) yr^(-1)),but decreased at higher N rates.N fertilization had consistent positive effects on PCMF in the 2 years of sampling.The effects of land use drivers on multifunctionality were indirectly influenced by bacterial biomass,plant richness,and soil moisture changes.Our results also indicated that the impacts of land use drivers on multifunctionality played an important role in maintaining a range of functions at low levels of functioning(<50% functional threshold).Low N fertilization levels(£10 g N m^(-2) yr^(-1))were able to reduce the negative effects of mowing on ecosystem multifunctionality while promoting plant biomass(food for livestock)and C storage.These findings are useful for designing practical strategies toward promoting multifunctionality by managing multiple LUIDs in a meadow steppe.

关键词： Ecosystem multifunctionality Sustainable grassland management Land use intensification Mowing Multi-threshold approach Nitrogen fertilization

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Promotion of structural plasticity in area V2 of visual cortex prevents against object recognition memory deficits in aging and Alzheimer's disease rodents

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Neural Regeneration Research 2024年第8期19卷 1835-1841页

作者： Irene Navarro-Lobato Mariam Masmudi-Martín manuel F.López-Aranda Juan F.López-Téllez Gloria delgado Pablo Granados-Durán Celia Gaona-Romero Marta Carretero-Rey Sinforiano Posadas María E.Quiros-Ortega Zafar U.Khan Laboratory of Neurobiology Centro de Investigaciones Médico Sanitarias(CIMES)University of MalagaMalagaSpain Department of Medicine Faculty of MedicineUniversity of MalagaMalagaSpain Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas(CIBERNED) Institute of Health Carlos IIIMadridSpain the Donders Institute for Brain Cognition and Behaviour Radboud UniversityNijmegenThe Netherlands the Brain Metastasis Group National Cancer Research Centre(CNIO)MadridSpain the Department of Neurobiology University of California-Los AngelesLos AngelesCAUSA

Memory deficit,which is often associated with aging and many psychiatric,neurological,and neurodegenerative diseases,has been a challenging issue for treatment.Up till now,all potential drug candidates have failed to produce satisfa ctory effects.Therefore,in the search for a solution,we found that a treatment with the gene corresponding to the RGS14414protein in visual area V2,a brain area connected with brain circuits of the ventral stream and the medial temporal lobe,which is crucial for object recognition memory(ORM),can induce enhancement of ORM.In this study,we demonstrated that the same treatment with RGS14414in visual area V2,which is relatively unaffected in neurodegenerative diseases such as Alzheimer s disease,produced longlasting enhancement of ORM in young animals and prevent ORM deficits in rodent models of aging and Alzheimer’s disease.Furthermore,we found that the prevention of memory deficits was mediated through the upregulation of neuronal arbo rization and spine density,as well as an increase in brain-derived neurotrophic factor(BDNF).A knockdown of BDNF gene in RGS14414-treated aging rats and Alzheimer s disease model mice caused complete loss in the upregulation of neuronal structural plasticity and in the prevention of ORM deficits.These findings suggest that BDNF-mediated neuronal structural plasticity in area V2 is crucial in the prevention of memory deficits in RGS14414-treated rodent models of aging and Alzheimer’s disease.Therefore,our findings of RGS14414gene-mediated activation of neuronal circuits in visual area V2 have therapeutic relevance in the treatment of memory deficits.

关键词： behavioral performance brain-derived neurotrophic factor cognitive dysfunction episodic memory memory circuit activation memory deficits memory enhancement object recognition memory prevention of memory loss regulator of G protein signaling

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Dissolved Organic Nitrogen in Mediterranean Ecosystems

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Pedosphere 2011年第3期21卷 309-318页

作者： M.delgado-baquerizo F.COVELO A.GALLARDO Department of Physical Chemical and Natural Systems University Pablo de Olavide Ctra. de Utrera km.1Seville 41013 (Spain)

Dissolved organic nitrogen (DON) in soils has recently gained increasing interest because it may be both a direct N source for plants and the dominant available N form in nutrient-poor soils, however, its prevalence in Mediterranean ecosystems remains unclear. The aims of this study were to i) estimate soil DON in a wide set of Mediterranean ecosystems and compare this levels with those for other ecosystems; ii) describe temporal changes in DON and dissolved inorganic nitrogen (DIN) forms (NH4+ and NO3? ), and characterize spatial heterogeneity within plant communities; and iii) study the relative proportion of soil DON and DIN forms as a test of Schimel and Bennett's hypothesis that the prevalence of different N forms follows a gradient of nutrient availability. The study was carried out in eleven plant communities chosen to represent a wide spectrum of Mediterranean vegetation types, ranging from early to late successional status. DON concentrations in the studied Mediterranean plant communities (0-18.2 mg N kg-1) were consistently lower than those found in the literature for other ecosystems. We found high temporal and spatial variability in soil DON for all plant communities. As predicted by the Schimel and Bennett model for nutrient-poor ecosystems, DON dominance over ammonium and nitrate was observed for most plant communities in winter and spring soil samples. However, mineral-N dominated over DON in summer and autumn. Thus, soil water content may have an important effect on DON versus mineral N dominance in Mediterranean ecosystems.

关键词：生态系统模型可溶性有机氮地中海土壤水分含量土壤样品植物群落溶解无机氮空间异质性

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Determining the need for a thoracoscopic approach to treat a giant hiatal hernia when abdominal access is poor

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World Journal of Gastrointestinal Surgery 2023年第12期15卷 2739-2746页

作者： Francisco Javier Pérez Lara Rogelio Zubizarreta Jimenez Tatiana Prieto-Puga Arjona Pilar Gutierrez delgado Juan manuel Hernández Carmona Jose manuel Hernández Gonzalez Maria Pitarch Martinez Department of Surgery Hopital de AntequeraAntequera 29200Spain DOXA MicrofluidicsRincon de la Victoria 29730Spain Department of Surgery HRU Carlos HayaUnidad Cirugia Hepatobiliopancreat&TrasplantesMalaga 29200Spain

BACKGROUND Giant hernias present a significant challenge for digestive surgeons.The approach taken(laparoscopic vs thoracoscopic)depends largely on the preferences and skills of each surgeon,although in most cases today the laparoscopic approach is preferred.AIM To determine whether patients presenting inadequate laparoscopic access to the intrathoracic hernial sac obtain poorer postoperative results than those with no such problem,in order to assess the need for a thoracoscopic approach.METHODS For the retrospective series of patients treated in our hospital for hiatal hernia(n=112),we calculated the laparoscopic field of view and the working area accessible to surgical instruments,by means of preoperative imaging tests,to assess the likely outcome for cases inaccessible to laparoscopy.RESULTS Patients with giant hiatal hernias for whom a preoperative calculation suggested that the laparoscopic route would not access all areas of the intrathoracic sac presented higher rates of perioperative complications and recurrence during follow-up than those for whom laparoscopy was unimpeded.The difference was statistically significant.Moreover,the insertion of mesh did not improve results for the non-accessible group.CONCLUSION For patients with giant hiatal hernias,it is essential to conduct a preoperative evaluation of the angle of vision and the working area for surgery.When parts of the intrathoracic sac are inaccessible laparoscopically,the thoracoscopic approach should be considered.

关键词： Hiatal hernia Abdominal surgery Laparoscopy Thoracoscopy surgery

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Tax avoidance and earnings management:a neural network approach for the largest European economies

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Financial Innovation 2023年第1期9卷 558-582页

作者： Francisco J.delgado Elena Fernández‑Rodríguez Roberto García‑Fernández manuel Landajo Antonio Martínez‑Arias Department of Economics Faculty of Economics and BusinessUniversity of OviedoAvda.del CristoS/N33071 OviedoSpain Department of Accounting Faculty of Economics and BusinessUniversity of OviedoAvda.del CristoS/N33071 OviedoSpain Department of Applied Economics Faculty of Economics and BusinessUniversity of OviedoAvda.del CristoS/N33071 OviedoSpain

In this study,we investigate the relationship between tax avoidance and earnings management in the largest five European Union economies by using artificial neural network regressions.This methodology allows us to deal with nonlinearities detected in the data,which is the principal contribution to the previous literature.We ana-lyzed Compustat data for Germany,the United Kingdom,France,Italy,and Spain for the 2006–2015 period,focusing on discretionary accruals.We considered three tax avoidance measures,two based on the effective tax rate(ETR)and one on book-tax differences(BTD).Our results indicate the presence of nonlinear patterns and a posi-tive,statistically significant relationship between discretionary accruals and both ETR indicators implying that when companies resort to earnings management,a larger tax-able income—and thus higher ETR and lesser tax avoidance–would ensue.Hence,as also highlighted by the fact that discretionary accruals do not appear to affect BTD,our evidence does not suggest that companies are exploiting tax manipulation to reduce their tax payments;thus,the gap between accounting and taxation seems largely unaf-fected by earnings management.

关键词： Tax avoidance Earnings management Artificial neural networks European Union

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