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Refining the Factors Affecting N_(2)O Emissions from Upland Soils with and without Nitrogen Fertilizer Application at a Global Scale

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Advances in Atmospheric Sciences 2024年第9期41卷 1804-1820页

作者： Wenqian JIANG Siqi LI Yong LI Meihui WANG Bo WANG Ji LIU Jianlin SHEN Xunhua ZHENG State key laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China key laboratory for agro-ecological processes in subtropical regions Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China changsha research station for agricultural&environmental monitoring Chinese Academy of SciencesChangsha 410125China University of Chinese Academy of Sciences Beijing 100049China State environmental Protection key laboratory of Formation and Prevention of the Urban Air Pollution Complex Shanghai Academy of Environment SciencesShanghai 200233China Institute of Carbon Neutrality Qilu ZhongkeJinan 251699China Hubei Province key laboratory for Geographical Process Analysis and Simulation Central China Normal UniversityWuhan 430079China Department of Ecohydrology Leibniz Institute of Freshwater Ecology and Inland FisheriesBerlin 12587Germany key laboratory of Environment Change and Resources Use in Beibu Gulf Ministry of EducationNanning Normal UniversityNanning 530001China Golden Mantis school of Architecture Soochow UniversitySuzhou 215123China

Nitrous oxide(N_(2)O)is a long-lived greenhouse gas that mainly originates from agricultural *** and more studies have explored the sources,influencing factors and effective mitigation measures of N_(2)O in recent ***,the hierarchy of factors influencing N_(2)O emissions from agricultural soils at the global scale remains *** this study,we carry out correlation and structural equation modeling analysis on a global N_(2)O emission dataset to explore the hierarchy of influencing factors affecting N_(2)O emissions from the nitrogen(N)and non-N fertilized upland farming systems,in terms of climatic factors,soil properties,and agricultural *** results show that the average N_(2)O emission intensity in the N fertilized soils(17.83 g N ha^(-1)d^(-1))was significantly greater than that in the non-N fertilized soils(5.34 g N ha^(−1) d^(−1))(pagricultural practices are the most important influencing factors on N_(2)O emission in non-N and N fertilized upland soils,*** different climatic zones,without fertilizer,the primary influence factors on soil N_(2)O emissions are soil physical properties in subtropical monsoon zone,whereas climatic factors are key in the temperate *** fertilizer,the primary influence factors for subtropical monsoon and temperate continental zones are soil physical properties,while agricultural measures are the main factors in the temperate monsoon *** enhanced agricultural practices,such as reduced N fertilizer rate combined with the addition of nitrification and urease inhibitors can potentially mitigate N_(2)O emissions by more than 60%in upland farming systems.

关键词： N_(2)O emissions influencing factors nitrogen cycling upland farming systems

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Nitrous Oxide Emissions from a Masson Pine Forest Soil in subtropical Central China

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Pedosphere 2015年第2期25卷 263-274页

作者： CHEN Dan FU Xiao-Qing WANG Cong LIU Xin-Liang LI Hang SHEN Jian-Lin WANG Yi LI Yong WU Jin-Shui changsha research station for agricultural and environmental monitoring Key Laboratory of Agro-ecological Processes in Subtropical RegionInstitute of Subtropical AgricultureChinese Academy of Sciences

The forest ecosystem plays a pivotal role in contributing greenhouse gases to the *** order to characterize the temporal pattern of nitrous oxide(N_2O) emissions and identify the key factors affecting N_2O emissions from a Masson pine forest in a hilly red-soil region in subtropical central China,we measured the N_2O emissions in Jinjing of Hunan Province using the static chambergas chromatographic method for 3 years(2010-2012) and analyzed the relationships between the N_2O fluxes and the environmental *** results revealed that the N_2O fluxes over the 3 years varied from-36.0 to 296.7 μg N m^(-2) h^(-1),averaging 18.4±5.6 μg N m^(-2) h^(-1)(n=3).The average annual N_2O emissions were estimated to be 1.6±0.3 kg N ha^(-1) year^(-1).The N_2O fluxes exhibited clear intra-annual(seasonal) variations as they were higher in summers and lower in *** with other forest observations in the subtropics,N_2O emissions at our site were relatively high,possibly due to the high local dry/wet N deposition,and were mostly sensitive to variations in precipitation and soil ammonium N *** this work,a multiple linear regression model was developed to determine the influence of environmental factors on N_2O emissions,in which a category predictor of "Season" was intentionally used to account for the seasonal variation of the N_2O *** a model explained almost 40%of the total variation in daily N_2O emissions from the Masson pine forest soil studied(P<0.001).

关键词： environmental factors multiple linear regression model N deposition season subtropical forests

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Concentrations and isotopic characteristics of atmospheric reactive nitrogen around typical sources in Beijing,China

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Journal of Arid Land 2016年第6期8卷 910-920页

作者： LIU Jieyun ZHANG Ying LIU Xuejun TANG Aohan QIU Husen ZHANG Fusuo Center for Resources Environment and Food SecurityKey Laboratory of Plant-Soil InteractionsMinistry of EducationCollege of Resources & Environmental SciencesChina Agricultural University School of Environment and Surveying Engineering Suzhou University changsha research station for agricultural Environment monitoring & key laboratory of agro-ecological processes in subtropical region Institute of Subtropical AgricultureChinese Academy of Sciences

With rapid economic growth in China, anthropogenic reactive nitrogen （Nr） emissions have more than doubled over the last two or three decades. Atmospheric Nr pollution is an environmental concern in China especially in megacities such as Beijing. In order to identify the impact of emission sources on atmospheric Nr pollution, we measured atmospheric Nr concentrations and their isotopic composition （δ15N） dynamics at three typical sites： landfill, pig farm and road traffic sites in Beijing from April 2010 to March 2011. Passive samplers were used for monitoring ammonia （NH3） and nitrogen dioxide （NO2）, two major Nr species, while their δ15N values were measured by a diffusion method combined with mass spectrometer approach. The raw water pool of the landfill and fattening house of the pig farm were important NH3 sources with mean NH3 concentrations being 2,829 and 2,369 μg/m3, respectively, while the road traffic site was a minor NH3 source （10.6 μg/m3）. NH3 concentrations at sites besides the landfill and roads were high in summer and low in winter due to the annual variation of temperature and the change of emission source intensity. In contrast, the NH3 concentrations inside the pig farm house were high in winter and low in summer, for the barn windows were open in summer and closed in winter. The mean NO2 concentrations were 89.8, 32.9 and 23.0 μg/m3 at the road traffic, the landfill and pig farm sites, respectively. Due to vehicle fuel combustion, NO2 concentration at the road traffic was the highest among the three sources, and the road traffic was a main NO2 emission source. PM10, pNH4＊ and pNO3- concentrations in particulate matter were higher in summer than in winter （except PM10 for the pig farm）. The δ15NH3 values ranged from -19.14‰ to 7.82‰, with an average of-0.05‰ for the landfill site, and the lowest values were observed in June and July. The δ15NH3 values for the pig farm site ranged from -29.78‰ to-14.05‰ with an average of-24.51‰, and the 515NH3 va

关键词： atmospheric reactive N pollution emission sources NH3 NO2 particulate matter

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environmental and spatial contributions to tree community assembly across life stages and scales in evergreen-deciduous broadleaf karst forests,southwest China

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林业研究:英文版 2023年第5期34卷 1323-1331页

作者： Liang Su Hu Du Fuping Zeng Wanxia Peng Hua Wang Kelin Wang Menzhen Lu Tongqing Song key laboratory of agro-ecological processes in subtropical region Institute of Subtropical AgricultureChinese Academic of SciencesChangshaPeople’s Republic of China Guangxi key laboratory of Karst ecological processes and Services Huanjiang Observation and Research Station of Karst EcosystemChinese Academic of SciencesHuanjiangPeople’s Republic of China College of Resources and Environment Hunan Agricultural UniversityChangshaPeople’s Republic of China

Spatial and environmental processes are two ecological processes that have attracted considerable attention in plant community assembly,depending on sampling scale and life ***,the processes that determine community assembly have not been studied in the karst region of southwest *** this study,a 25-ha(500 m×500 m)monitoring plot within the subtropical climax forest in the karst region was established and canonical correspondence analysis was used to reveal the effects of topography and soil on the spatial patterns of tree community *** study suggests that spatial processes dominate species composition and the combined effects of spatial and environmental processes play an important *** interpretation rate increases with enlarging the sampling ***,the pattern of variation partitioning was similar in different life *** variables significantly affected species composition at different sampling sizes and life histories and had a higher interpretation rate of species composition on larger s ampling *** wetness index was the most important variable to explain species composition of the environmental *** results suggest that it is necessary to consider the relative importance of environmental and spatial factors on community assembly to better understand,conserve,and manage subtropical karst forests.

关键词： Species composition Spatial distribution Variation partitioning Community assembly Karst ecosystems

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Soil phosphorus availability and rice phosphorus uptake in paddy fields under various agronomic practices

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Pedosphere 2021年第1期31卷 103-115页

作者： Bingshen JIANG Jianlin SHEN Minghong SUN Yajun HU Wenqian JIANG Juan WANG Yong LI Jinshui WU key laboratory of agro-ecological processes in subtropical region and changsha research station for agricultural&environmental monitoring Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China University of Chinese Academy of Sciences Beijing 100049China College of Biological and Food Engineering Huanghuai UniversityZhumadian 463000China College of Resources&Environment Hunan Agricultural UniversityChangsha 410128China

agronomic practices affect soil phosphorus(P) availability, P uptake by plants, and subsequently the efficiency of P use. A field experiment was carried out to investigate the effects of various agronomic practices(straw incorporation, paddy water management, nitrogen(N) fertilizer dose, manure application,and biochar addition) on soil P availability(e.g., soil total P(STP), soil available P(SAP), soil microbial biomass P(SMBP), and rice P uptake as well as P use efficiency(PUE)) over four cropping seasons in a rice-rice cropping system, in subtropical central China. Compared to the non-straw treatment(control,using full dose of chemical N fertilizer), straw incorporation increased SAP and SMBP by 9.3%–18.5% and 15.5%–35.4%, respectively;substituting half the chemical N fertilizer dose with pig manure and the biochar application increased STP, SAP, and SMBP by 10.5%–48.3%, 30.2%–236.0%, and 19.8%–72.4%,respectively, mainly owing to increased soil P and organic carbon inputs;adding a half dose of N and no N input(reduced N treatments) increased STP and SAP by 2.6%–7.5% and 19.8%–33.7%, respectively, due to decreased soil P outputs. Thus, soil P availability was greatly affected by soil P input and use. The continuous flooding water regime without straw addition significantly decreased SMBP by 11.4% compared to corresponding treatments under a mid-season drainage water regime. Total P uptake by rice grains and straws at the harvest stage increased under straw incorporation and under pig manure application, but decreased under the reduced N treatments and under biochar application at a rate of 48 t ha-1, compared to the control. Rice P uptake was significantly positively correlated with rice biomass, and both were positively correlated with N fertilizer application rates, SAP, SMBP, and STP. Phosphorus use efficiency generally increased under straw incorporation but decreased under the reduced N treatments and under the manure application(with excessive P input), compa

关键词： biochar manure fertilizer nutrient management P use efficiency paddy soil straw incorporation water regime

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Small mammal community succession on the beach of Dongting Lake,China after the Three Gorges Project

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Integrative Zoology 2014年第3期9卷 294-308页

作者： Meiwen ZHANG Yong WANG Bo LI Cong GUO Guoxian HUANG Guo SHEN Xunjun ZHOU Dongting Lake station for Wetland Ecosystem research Key Laboratory of Agro-ecological Processes in the Subtropical RegionInstitute of Subtropical AgricultureChinese Academy of SciencesChangshaChina College of Life Science Sichuan UniversityChengduChina research Center for Eco-environmental Sciences Chinese Academy of SciencesBeijingChina

Although the Three Gorges Project(TGP)may have affected the population structure and distribution of plant and animal communities,few studies have analyzed the effect of this project on small mammal ***,the present paper compares the small mammal communities inhabiting the beaches of Dongting Lake using field investigations spanning a 20-year period,both before and after the TGP was *** traps were used throughout the *** results indicate that the TGP caused major changes to the structure of the small mammal community at a lake downstream of the ***,species abundance on the beaches increased after the project *** striped field mouse(Apodemus agrarius)and the Norway rat(Rattus norvegicus),which rarely inhabited the beach before the TGP,became abundant(with marked population growth)once water was impounded by the Three Gorges ***,dominant species concentration indices exhibited a stepwise decline,indicating that the community structure changed from a single dominant species to a more diverse species mix after TGP ***,the regulation of water discharge release by the TGP might have caused an increase in the species diversity of the animal community on the beaches.A significant difference in diversity indices was obtained before and after the TGP *** indices also indicate a gradual increase in species ***,a long-term project should be established to monitor the population fluctuations of the Yangtze vole(Microtus fortis),the striped field mouse and the Norway rat to safeguard against population outbreaks(similar to the Yangtze vole outbreak in 2007),which could cause crop damage to adjacent farmland,in addition to documenting the succession process of the small mammal community inhabiting the beaches of Dongting Lake.

关键词： beach Dongting Lake small mammal community succession Three Gorges Project

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Comparing Eight Computing Algorithms and Four Consensus Methods to Analyze Relationship between Land Use Pattern and Driving Forces

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International Journal of Geosciences 2019年第1期10卷 12-28页

作者： Xinliang Liu Yi Wang Yong Li Feng Liu Jianlin Shen Liang Ou Juan Wang Runlin Xiao Jinshui Wu key laboratory of agro-ecological processes in subtropical region and changsha research station for agricultural & environmental monitoring Institute of Subtropical Agriculture Chinese Academy of Sciences Changsha China Zhangjiajie City environmental monitoring Center station Zhangjiajie China

Although many computing algorithms have been developed to analyze the relationship between land use pattern and driving forces (RLPDF), little has been done to assess and reduce the uncertainty of predictions. In this study, we investigated RLPDF based on 1990, 2005 and 2012 datasets at two spatial scales using eight state-of-the-art single computing algorithms and four consensus methods in Jinjing rive catchment in Hunan Province, China. At the entire catchment scale, the mean AUC values were between 0.715 (ANN) and 0.948 (RF) for the single-algorithms, and from 0.764 to 0.962 for the consensus methods. At the subcatchment scale, the mean AUC values between 0.624 (CTA) and 0.972 (RF) for the single-algorithms, and from 0.758 to 0.979 for the consensus methods. At the subcatchment scale, the mean AUC values were between 0.624 (CTA) and 0.972 (RF) for the single-algorithms, and from 0.758 to 0.979 for the consensus methods. The result suggested that among the eight single computing algorithms, RF performed the best overall for woodland and paddy field;consensus method showed higher predictive performance for woodland and paddy field models than the single computing algorithms. We compared the simulation results of the best - and worst-performing algorithms for the entire catchment in 2012, and found that approximately 72.5% of woodland and 72.4% of paddy field had probabilities of occurrence of less than 0.1, and 3.6% of woodland and 14.5% of paddy field had probabilities of occurrence of more than 0.5. In other words, the simulation errors associated with using different computing algorithms can be up to 14.5% if a probability level of 0.5 is set as the threshold. The results of this study showed that the choice of modeling approaches can greatly affect the accuracy of RLPDF prediction. The computing algorithms for specific RLPDF tasks in specific regions have to be localized and optimized.

关键词： Land Use Pattern Spatial Scales Consensus Methods Computing Algorithms

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Straw and biochar strongly affect functional diversity of microbial metabolism in paddy soils

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Journal of Integrative Agriculture 2019年第7期18卷 1474-1485页

作者： YUAN Hong-zhao ZHU Zhen-ke WEI Xiao-meng LIU Shou-long PENG Pei-qin Anna Gunina SHEN Jian-lin Yakov Kuzyakov GE Ti-da WU Jin-shui WANG Jiu-rong key laboratory of agro-ecological processes in subtropical region/changsha research station for agricultural and environmental monitoring Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125P.R.China College of environmental Science and Engineering Central South University of Forestry and TechnologyChangsha 410004P.R. China Department of Soil Biology and Biochemistry Dokuchaev Soil Science InstituteMoscow 119017Russian Federation Department of agricultural Soil Science University of GottingenGottingen 37077Germany Institute of environmental Sciences Kazan Federal UniversityKazan 420049Russian Federation agro-Technology Institute RUDN UniversityMoscow 117198Russian Federation

The application of straw and biochar is widely practiced for the improvement of soil ***,its impact on microbial functional profiles,particularly with regard to paddy soils,is not well *** aim of this study was to investigate the diversity of microbial carbon use patterns in paddy soils amended with straw or straw-derived biochar in a 3-year field experiment in fallow soil and at various development stages of a rice crop(i.e.,tillering and blooming).We applied the community level physiological profiling approach,with 15 substrates(sugars,carboxylic and amino acids,and phenolic acid).In general,straw application resulted in the greatest microbial functional diversity owing to the greater number of available C sources than in control or biochar *** amendment promoted the use of α-ketoglutaric acid,the mineralization of which was higher than that of any other *** component analyses indicated that microbial functional diversity in the biochar-amended soil was separated from those of the straw-amended and control *** analyses revealed that soil organic carbon content was the most important factor regulating the pattern of microbial carbon *** and nutrient uptake by rice plants modulated microbial functions in paddy soils and stimulated the microbial use of N-rich substances,such as amino ***,our results demonstrated that the functional diversity of microorganisms in organic amended paddy soils is affected by both physicochemical properties of amendment and plant growth stage.

关键词： carbon metabolism microbial functional diversity biochar amendment paddy soil MicroRespTM

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Spatio-Temporal Variability of Shallow Groundwater Quality in a Hilly Red-Soil agricultural Catchment in subtropical Central China

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International Journal of Geosciences 2015年第1期6卷 1-11页

作者： Qiao Luo Yong Li Yuyuan Li Xinliang Liu Runlin Xiao Jinshui Wu key laboratory of agro-ecological processes in subtropical region Institute of Subtropical Agriculture Chinese Academy of Sciences Changsha China changsha research station for agricultural & environmental monitoring Changsha China The University of Chinese Academy of Sciences Beijing China

Groundwater quality varies not only in space but also in time. In order to analyze the spatiotemporal variety of ground water quality, the concentration of ammonium nitrogen (NH4N), nitrate nitrogen (NO3N), total nitrogen (TN) and total phosphorus (TP) in very shallow groundwater were investigated in a red-soil catchment in subtropical central China, based on a three-dimensional kriging method. The spatio-temporal analysis demonstrated that NH4N, NO3N and TP presented strong spatio-temporal autocorrelation (with a nugget-to-sill ratio of <25%) and that TN presented a moderate spatio-temporal autocorrelation (with a nugget-to-sill ratio between 25% and 75%). According to the Chinese Groundwater Quality Standards, the ratio of areas contaminated by NH4N, NO3N, TN and TP to the whole catchment was 20.05%, 1.46%, 5.07%, 5.98%, respectively. The 3D delineation of continuously dynamic variation of contaminated area indicated that the catchment’s very shallow groundwater had a moderate contamination by NH4N, slight by TN and TP, and almost non by NO3N. Although the contaminated area was very small, only occurring in small dispersed patches, a close attention should be paid to the shallow groundwater quality because local farmers obtain their domestic drinking water directly from this shallow groundwater without any treatment prior to consuming and the potential health hazard is considerable. The findings from this study highlight the importance of surveillance of the contaminated area over time for decision making to protect public health and maintain sustainable development of the catchment.

关键词： Drinking Water Nitrogen Phosphorus 3D Spatio-Temporal Geostatistics

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SOIL NITROGEN CYCLING AND environmental IMPACTS IN THE subtropical HILLY region OF CHINA: EVIDENCE FROM MEASUREMENTS AND MODELING

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Frontiers of agricultural Science and Engineering 2022年第3期9卷 407-424页

作者： Jianlin SHEN Yong LI Yi WANG Yanyan LI Xiao ZHU Wenqian JIANG Yuyuan LI Jinshui WU key laboratory of agro-ecological processes in subtropical region and changsha research station for agricultural&environmental monitoring Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China University of Chinese Academy of Sciences Beijing 100049China State key laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Resources and environmental Engineering Ludong UniversityYantai 264025China

The subtropical hilly region of China is a region with intensive crop and livestock production,which has resulted in serious N pollution in soil,water and *** review summarizes the major soil N cycling processes and their influencing factors in rice paddies and uplands in the subtropical hilly region of *** major N cycling processes include the N fertilizer application in croplands,atmospheric N deposition,biological N fixation,crop N uptake,ammonia volatilization,N_(2)O/NO emissions,nitrogen runoff and leaching *** catchment nutrients management model for N cycle modeling and its case studies in the subtropical hilly region were also ***,N management practices for improving N use efficiency in cropland,as well as catchment scales are summarized.

关键词： nitrogen cycling soil nitrogen nitrogen deposition greenhouse gases emission non-point source pollution nitrogen use efficiency

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