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土壤圈(英文版)
土壤圈(英文版)

周健民

双月刊

1002-0160

eopedos@issas.ac.cn; pedosphere@issas.ac.cn; rmdu@issas.ac.cn eopedo@issas.ac.cn

025-86881235、86881359

210008

南京市北京东路71号中国科学院南京土壤研究所

土壤圈(英文版)/Journal An International Journal PedosphereCSCDCSTPCD北大核心SCI
查看更多>>《PEDOSPHERE》(土壤圈)是中国出版的土壤学科唯一外文版国际性学术期刊,也是我国土壤学领域唯一的SCI源刊。 主要刊登土壤学领域国内外未曾公开发表的具有坚实科学理论和实验基础与创新的最新高水平科研成果,内容包括土壤化学、土壤物理学、土壤生物与生物化学、土壤肥力与植物营养、土壤环境与生态学、土壤微生物学、土壤地理、水土保持、土壤信息与遥感技术、土壤质量与土壤修复等与生物圈、岩石圈、水圈和大气圈密切关联的土壤科学理论、实验技术及应用的学术研究论文、专题综述、研究简报、书评等。旨在及时传播国内外土壤科学最新成果,促进国际学术交流与合作,推动中国和世界土壤科学事业的发展。
正式出版
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    Laboratory and numerical modelling of irrigation infiltration and nitrogen leaching in homogeneous soils

    Lei WURuizhi LIYan WANGZongjun GUO...
    146-158页
    查看更多>>摘要:Nitrogen(N)plays a key role in crop growth and production;however,data are lacking especially regarding the interaction of biochar,grass cover,and irrigation on N leaching in saturated soil profiles.Eighteen soil columns with 20-cm diameter and 60-cm height were designed to characterize the effects of different grass cover and biochar combinations,i.e.,bare soil+0%biochar(control,CK),perennial ryegrass+0%biochar(C1),Festuca arundinacea+0%biochar(C2),perennial ryegrass+1%biochar(C3),perennial ryegrass+2%biochar(C4),perennial ryegrass+3%biochar(C5),F.arundinacea+1%biochar(C6),F.arundinacea+2%biochar(C7),and F.arundinacea+3%biochar(C8),on periodic irrigation infiltration and N leaching in homogeneous loess soils from July to December 2020.Leachates in CK were 10.2%-35.3%higher than those in C1 and C2.Both perennial ryegrass and F.arundinacea decreased the volumes of leachates and delayed the leaching process in the 1%,2%,and 3%biochar treatments,and the vertical leaching rate decreased with biochar addition.The N leaching losses were concentrated in the first few leaching tests,and both total N(TN)and nitrate(NO3-)-N concentrations in CK and C1-C8 decreased with increasing leaching test times.Biochar addition(1%,2%,and 3%)could further reduce the leaching risk of NO3--N and the NO3--N loss decreased with biochar addition.However,compared to 1%biochar,2%biochar promoted the leaching of TN under both grass cover types.The N leaching losses in CK,C1,C2,C3,C4,C6,and C7 were primarily in the form of NO3--N.Among these treatments,CK,C1,and C2 had the highest cumulative leaching fractions NO3--N(>90%),followed by those in C3,C4,C6,and C7(>80%).The cumulative leaching fraction of NO3--N decreased with increasing leaching test times and biochar addition,and 3%biochar addition(i.e.,C5 and C8)reduced it to approximately 50%.The one-dimensional advective-dispersive-reactive transport equation can be used as an effective numerical approach to simulate and predict NO3--N leaching in saturated homogeneous soils.Understanding the effects of different biochar and grass combinations on N leaching can help us design environmentally friendly interventions to manage irrigated farming ecosystems and reduce N leaching into groundwater.

    Environmental benefits and farmers'adoption of winter cover crops in the North China Plain

    Shufang GUOYitao ZHANGLimei ZHAIJian LIU...
    159-169页
    查看更多>>摘要:The introduction of cover crops into monoculture systems to improve soil health has been widely adopted worldwide.However,little is known about the environmental risks and application prospects of different cover crops in spring maize(Zea mays L.)monocultures proposed in the North China Plain.A pot experiment was conducted to evaluate the effects of different winter cover crops on subsequent maize yield,soil fertility,and environmental risks of nitrogen(N)loss,and a questionnaire survey was conducted to examine factors influencing farmers'willingness to adopt cover crops in the North China Plain.Based on the same fertilization regime during the maize growing period,four winter cover crop treatments were set up,including bare fallow,hairy vetch(Vicia villosa Roth.),February orchid(Orychophragmus violaceus),and winter oilseed rape(Brassica campestris L.).The results indicated that winter cover crops significantly increased subsequent maize yield and soil organic carbon,total N,and microbial biomass carbon and N compared with the bare fallow treatment.The incorporation of cover crops led to a negligible increase in nitrous oxide(N2O)emissions and had a very limited effect on ammonia(NH3)emissions.The incorporation of February orchid and winter oilseed rape decreased nitrate leaching compared with the hairy vetch treatment in the maize growing season.The N losses via N2O and NH3 emissions and N leaching accounted for 71%-84%of the N surplus.However,yield increase and environmental benefits were not the main positive factors for farmers to accept cover crops.Financial incentive was rated by 83.9%of farmers as an"extremely important"factor,followed by other costs,when considering winter cover cropping.These results indicate that the environmental benefits depend on the type of cover crop.Maintaining high levels of soil fertility and maize yield,providing sufficient subsidies,and encouraging large-area cultivation of cover crops are critical measures to promote winter cover cropping in the North China Plain.

    Incorporation of source contributions to improve the accuracy of soil heavy metal mapping using small sample sizes at a county scale

    Jie SONGXin WANGDongsheng YUJiangang LI...
    170-180页
    查看更多>>摘要:Estimating heavy metal(HM)distribution with high precision is the key to effectively preventing Chinese medicinal plants from being polluted by the native soil.A total of 44 surface soil samples were gathered to detect the concentrations of eight HMs(As,Hg,Cu,Cr,Ni,Zn,Pb,and Cd)in the herb growing area of Luanping County,northeastern Hebei Province,China.An absolute principal component score-multiple linear regression(APCS-MLR)model was used to quantify pollution source contributions to soil HMs.Furthermore,the source contribution rates and environmental data of each sampling point were simultaneously incorporated into a stepwise linear regression model to identify the crucial indicators for predicting soil HM spatial distributions.Results showed that 88%of Cu,72%of Cr,and 72%of Ni came from natural sources;50%of Zn,49%of Pb,and 59%of Cd were mainly caused by agricultural activities;and 44%of As and 56%of Hg originated from industrial activities.When three-type(natural,agricultural,and industrial)source contribution rates and environmental data were simultaneously incorporated into the stepwise linear regression model,the fitting accuracy was significantly improved and the model could explain 31%-86%of the total variance in soil HM concentrations.This study introduced three-type source contributions of each sampling point based on APCS-MLR analysis as new covariates to improve soil HM estimation precision,thus providing a new approach for predicting the spatial distribution of HMs using small sample sizes at the county scale.

    Land use effects on the dynamics of soil C,N and microbes in the water-wind erosion crisscross region of the northern Loess Plateau,China

    Yi WANGChunyue LIShunjin HU
    181-190页
    查看更多>>摘要:The water-wind erosion crisscross region of the northern Loess Plateau in China is under constant pressure from severe erosion due to its windy and dry climate and intensive human activities.Identifying sustainable land use patterns is key to maintaining ecosystem sustainability in the area.Our aim was to appraise the impacts of different land use regimes on the dynamics of soil total organic C(TOC),total N(TN),and microbes in a typical watershed in the northern Loess Plateau to identify suitable land use types that can maintain soil fertility and sustainability.A field experiment was performed in Liudaogou watershed in Shenmu City,Shaanxi Province,China,where the dynamics of soil TOC and TN,microbial biomass C and N,microbial respiration,and net N mineralization in six typical land use types,dam land,rainfed slope land,deciduous broadleaf forest,evergreen coniferous forest,shrubland,and grassland,were measured in three different growing seasons.Land use type and season significantly affected TOC,TN,and the dynamics of microbial biomass and activity.As the most anthropogenically disturbed land use pattern,dam land was an optimal land use pattern for TOC sequestration due to its higher TOC and TN,but lower microbial activity.Soil TOC,TN,and microbial properties demonstrated a decreasing trend after natural grassland was converted to shrubland,forest,and rainfed slope land.Shrubland with exotic N-fixing Korshinsk peashrub(Caragana korshinskii Kom.)can maintain TOC,TN,and microbial properties similar to those in grassland.Soil TOC,NH4+-N,TN,moisture,and extractable C were the principal indexes for soil microbial biomass and activity and explained 88.90%of the total variance.Thus,grassland was the optimal land use pattern in the water-wind erosion crisscross region of the northern Loess Plateau to maintain ecosystem stability and sustainability.

    Promotion effects of salt-alkali on ammonia volatilization in a coastal soil

    Zhenqi SHIDongli SHEYongchun PANYongqiu XIA...
    191-199页
    查看更多>>摘要:Coastal ecosystems are highly susceptible to salt-related problems due to their formation process and geographical location.As such ecosystems are the most accessible land resources on Earth,clarifying and quantifying the effects of salt-alkali conditions on N concentration and ammonia(NH3)volatilization are pivotal for promoting coastal agricultural productivity.The challenge in establishing this effect is to determine how salt-alkali conditions impact NH3 volatilization through direct or indirect interactions.An incubation experiment using a coastal soil from a paddy farmland,combined with the structural equation modeling(SEM)method,was conducted to reveal the net effects of salt-alkali on NH3 volatilization and the role of environmental and microbial factors in mutual interaction networks.The specific experimental design consisted of four salt treatments(S1,S2,S3,and S4:1‰,3‰,8‰,and 15‰NaCl by mass of soil,respectively),four alkaline treatments(A1,A2,A3,and A4:0.5‰,1‰,3‰,and 8‰ NaHCO3 by mass of soil,respectively)and a control without NaCl or NaHCO3 addition(CK),and each treatment had three urea concentrations(N1,N2,and N3:0.05,0.10,and 0.15 g N kg-1 soil,respectively)and three replicates.At the N1,N2,and N3 levels,NH3 volatilization increased by 9.3 1%-34.98%,3.07%-26.92%,and 2.99%-43.61%as the NaCl concentration increased from 1‰ to 15‰,respectively,compared with CK.With an increase in the NaHCO3 concentration from 0.5‰ to 8‰,NH3 volatilization increased by 8.36%-56.46%,5.49%-30.10%,and 30.72%-73.18%at the N1,N2,and N3 levels,respectively,compared with CK.According to the SEM method,salinity and alkalinity had positive direct effects on NH3 volatilization,with standardized path coefficients of 0.40 and 0.19,respectively.Considering the total effects(net positive and negative effects)in the SEM results,alkalinity had a greater influence than salinity(total standardized coefficient 0.104>0.086).Nitrogen concentrations in the incubation system showed a direct positive effect on NH3 volatilization(standardized path coefficient=0.78),with an obvious decrease under elevated salinity and alkalinity levels.Additionally,gene abundances of nitrogen-transforming microbes indirectly increased NH3 volatilization(total indirect standardized coefficient=0.31).Our results indicated that potential NH3 emissions from coastal saline areas could be enhanced more by soil alkalization than by salinization.

    Global patterns of soil phosphatase responses to nitrogen and phosphorus fertilization

    Xiaomei GOUYongqing RENXin QINXiaorong WEI...
    200-210页
    查看更多>>摘要:Hydrolysis of organic phosphorus(P)by soil phosphatases is an important process of P cycling in terrestrial ecosystems,significantly affected by nitrogen(N)and/or P fertilization.However,how soil acid phosphatase(ACP)and alkaline phosphatase(ALP)activities respond to N and/or P fertilization and how these responses vary with climatic regions,ecosystem types,and fertilization management remain unclear.This knowledge gap hinders our ability to assess P cycling and availability from a global perspective.We performed a meta-analysis to evaluate the global patterns of soil ACP and ALP activities in response to N and/or P addition.We also examined how climatic regions(arctic to tropical),ecosystem types(cropland,grassland,and forest),and fertilization management(experiment duration and fertilizer type and application rate)affected changes in soil phosphatases after fertilization.It was shown that N fertilizer resulted in 10.1%±2.9%increase in soil ACP activity but a minimal effect on soil ALP activity.In contrast,P fertilizer resulted in 7.7%±2.6%decrease in soil ACP activity but a small increase in soil ALP activity.The responses of soil ACP and ALP activities to N and/or P fertilization were largely consistent across climatic regions but varied with ecosystem types and fertilization management,and the effects of ecosystem types and fertilization management were enzyme-dependent.Random forest analysis identified climate(mean annual precipitation and temperature)and change in soil pH as the key factors explaining variations in soil ACP and ALP activities.Therefore,N input and ecosystem types should be explicitly disentangled when assessing terrestrial P cycling.

    Effects of herbicide butachlor application on the growth of periphytic biofilms and nitrogen loss in paddy systems

    Yanhui ZHAOMingjun LEILiandong JINGFan XIA...
    211-221页
    查看更多>>摘要:The application of butachlor as an herbicide in paddy fields is widely practiced,aiming to increase rice yield by directly or indirectly influencing the paddy environment.Periphytic biofilms,which form at the soil-water interface in paddy fields,are complex bioaggregates that play an important role in nitrogen(N)cycling.The objective of this study was to investigate the effect of butachlor on periphytic biofilm growth and N cycling under both light and dark conditions in the laboratory.The results revealed that butachlor application hindered the growth of periphytic biofilms and led to the dominance of Cyanobacteria as the primary prokaryotes,while inhibiting the development of eukaryotic Trebouxiophyceae.Furthermore,the application of butachlor reduced the richness and diversity of prokaryotes,but increased those of eukaryotes in periphytic biofilms.The light treatments exhibited higher total N loss because light favored periphytic biofilm growth and enhanced ammonium(NH4+)assimilation and nitrification.Additionally,butachlor application resulted in the increased retention of NH4+-N and nitrate(NO3-)-N and an increase in N loss via denitrification.The abundances of functional genes encoding enzymes such as ammonia monooxygenase,nitrite reductase,and nitrous oxide reductase were increased by butachlor application,favoring nitrification and denitrification processes.Overall,the results suggest that butachlor application leads to an increase in total N loss mainly through denitrification in paddy systems,particularly in the presence of periphytic biofilms.Thus,the results may provide valuable insights into the changes in periphytic biofilm growth and N cycling induced by butachlor,and future studies can further explore the potential implications of these changes in paddy soils.

    Application of controlled-release urea increases maize N uptake,environmental benefits and economic returns via optimizing temporal and spatial distributions of soil mineral N

    Mingxue SUNJuan LILili ZHANGXiaomeng SU...
    222-235页
    查看更多>>摘要:The creation of controlled-release urea(CRU)is a potent substitute for conventional fertilizers in order to preserve the availability of nitrogen(N)in soil,prevent environmental pollution,and move toward green agriculture.The main objectives of this study were to assess the impacts of CRU's full application on maize production and to clarify the connection between the nutrient release pattern of CRU and maize nutrient uptake.In order to learn more about the effects of CRU application on maize yields,N uptake,mineral N(Nmin)dynamics.N balance in soil-crop systems,and economic returns,a series of field experiments were carried out in 2018-2020 in Dalian City,Liaoning Province,China.There were 4 different treatments in the experiments:no N fertilizer input(control,CK);application of common urea at 210 kg ha-1(U),the ideal fertilization management level for the study site;application of polyurethane-coated urea at the same N input rate as U(PCU);and application of PCU at a 20%reduction in N input rate(0.8PCU).Our findings showed that using CRU(i.e.,PCU and 0.8PCU)may considerably increase maize N absorption,maintain maize yields,and increase N use efficiency(NUE)compared to U.The grain yield showed considerable positive correlations with total N uptake in leaf in U and 0.8PCU,but negative correlations with that in PCU,indicating that PCU caused excessive maize absorption while 0.8PCU could achieve a better yield response to N supply.Besides,PCU was able to maintain N fertilizer in the soil profile 0-20 cm away from the fertilization point,and higher Nmin content was observed in the 0-20 cm soil layer at various growth stages,particularly at the middle and late growing stages,optimizing the temporal and spatial distributions of Nmin.Additionally,compared to that in U,the apparent N loss rate in PCU was reduced by 36.2%,and applying CRU(PCU and 0.8PCU)increased net profit by 8.5%to 15.2%with less labor and fertilization frequency.It was concluded that using CRU could be an effective N fertilizer management strategy to sustain maize production,improve NUE,and increase economic returns while minimizing environmental risks.

    Assessment of soil total phosphorus storage in a complex topography along China's southeast coast based on multiple mapping scales

    Zhongxing CHENJing LIKai HUANGMiaomiao WEN...
    236-251页
    查看更多>>摘要:Soil phosphorus(P)plays a vital role in both ecological and agricultural ecosystems,where total P(TP)in soil serves as a crucial indicator of soil fertility and quality.Most of the studies covered in the literature employ a single or narrow range of soil databases,which largely overlooks the impact of utilizing multiple mapping scales in estimating soil TP,especially in hilly topographies.In this study,Fujian Province,a subtropical hilly region along China's southeast coast covered by a complex topographic environment,was taken as a case study.The influence of the mapping scale on soil TP storage(TPS)estimation was analyzed using six digital soil databases that were derived from 3 082 unique soil profiles at different mapping scales,i.e.,1∶50 000(S5),1∶200 000(S20),1∶500 000(S50),1∶1 000 000(S100),1∶4 000 000(S400),and 1∶10 000 000(S1000).The regional TPS in the surface soil(0-20 cm)based on the S5.S20.S50,S100,S400,and S1000 soil maps was 20.72,22.17,23.06.23.05,22.04,and 23.48 Tg,respectively,and the corresponding TPS at 0-100 cm soil depth was 80.98,80.71,85.00,84.03,82.96,and 86.72 Tg,respectively.By comparing soil TPS in the S20 to S1000 maps to that in the S5 map,the relative deviations were 6.37%-13.32%for 0-20 cm and 0.33%-7.09%for 0-100 cm.Moreover,since the S20 map had the lowest relative deviation among different mapping scales as compared to S5,it could provide additional soil information and a richer soil environment than other smaller mapping scales.Our results also revealed that many uncertainties in soil TPS estimation originated from the lack of detailed soil information,i.e.,representation and spatial variations among different soil types.From the time and labor perspectives,our work provides useful guidelines to identify the appropriate mapping scale for estimating regional soil TPS in areas like Fujian Province in subtropical China or other places with similar complex topographies.Moreover,it is of tremendous importance to accurately estimate soil TPS to ensure ecosystem stability and sustainable agricultural development,especially for regional decision-making and management of phosphate fertilizer application amounts.

    Responses of nitrogen cycling and related microorganisms to brackish wetlands formed by evapotranspiration

    Jiaohui FANGTianshu LüJian LIUShangbin HE...
    252-266页
    查看更多>>摘要:Elevated evapotranspiration due to warmer air temperature could raise salinity and nutrient levels of some inland wetlands,potentially impacting nitrogen cycling.To characterize the impact of high evapotranspiration on soil microbial nitrogen cycling in inland wetlands,we compared freshwater and brackish marsh(or non-marsh)wetlands in terms of sediment ammonia-oxidizing rate(AOR),denitrifying rate(DR),and related microbial communities in a typical inland basin,the Hulun Lake basin,in China.Results showed that marsh ecosystems(ME)exhibited 31%higher AOR and 65%higher DR than non-marsh ecosystems(NE).For NE,freshwater non-marsh wetland exhibited 12%higher AOR than brackish non-marsh wetland.This was probably due to the inhibitory effects of high NH4+and salinity levels on ammonia-oxidizing archaea in brackish non-marsh wetland.Conversely,DR in brackish non-marsh wetland was 23%higher than that in freshwater non-marsh wetland,with total organic carbon(TOC)significantly influencing this difference,suggesting that the higher DR in brackish non-marsh wetland was mainly due to its higher TOC level.For ME,due to the direct and indirect interference of salinity,brackish marsh wetland displayed 26%lower AOR and 19%lower DR than freshwater marsh wetland.Besides,brackish wetlands harbored distinct ammonia-oxidizing and denitrifying microbial communities compared to freshwater wetlands.The assembly of these communities was dominated by stochastic processes,while brackish wetlands exhibited more prominent deterministic processes than freshwater wetlands.Overall,high evapotranspiration altered activities and community characteristics of ammonia oxidizers and denitrifiers in inland brackish wetlands by enhancing salinity and nutrient levels,while emergent plants occurring in ME could mitigate the adverse effects of salt stress of inland brackish wetlands on nitrogen cycling.