Journal of environmental quality最新文献_第3页

Field-scale evaluation of ecosystem service benefits of bioenergy switchgrass 生物质柳枝稷生态系统服务效益的野外评价

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2025-04-22 DOI: 10.1002/jeq2.70025

Nictor Namoi, Cheng-Hsien Lin, Chunhwa Jang, Daniel Wasonga, Colleen Zumpf, Muhammad Umer Arshad, Emily Heaton, DoKyoung Lee

{"title":"Field-scale evaluation of ecosystem service benefits of bioenergy switchgrass","authors":"Nictor Namoi, Cheng-Hsien Lin, Chunhwa Jang, Daniel Wasonga, Colleen Zumpf, Muhammad Umer Arshad, Emily Heaton, DoKyoung Lee","doi":"10.1002/jeq2.70025","DOIUrl":"https://doi.org/10.1002/jeq2.70025","url":null,"abstract":"Purpose-grown perennial herbaceous species are nonfood crops specifically cultivated for bioenergy production and have the potential to secure bioenergy feedstock resources while enhancing ecosystem services. This study assessed soil greenhouse gas emissions (CO2 and N2O), nitrate (NO3-N) leaching reduction potential, evapotranspiration (ET), and water-use efficiency (WUE) of bioenergy switchgrass (Panicum virgatum L.) in comparison to corn (Zea mays L.). The study was conducted on field-scale plots in Urbana, IL, during the 2020–2022 growing seasons. Switchgrass was established in 2020 and urea-fertilized at 56 kg N ha−1 year−1. Corn management followed best management practices for the US Midwest, including no-till and 202 kg N ha−1 year−1 fertilization, applied as urea–ammonium nitrate (32%). Our results showed lower direct N2O emissions in switchgrass compared to corn. Although soil CO2 emissions did not differ significantly during the establishment year, emissions in subsequent years were over 50% higher in switchgrass than in corn, likely due to increased belowground biomass, which was over five times higher in switchgrass. Nitrate-N leaching decreased as the switchgrass stand matured, reaching 80% lower than in corn by the third year. Differences in ET and WUE between corn and switchgrass were not significant; however, results indicate a trend toward reduced WUE in switchgrass under drought, driven by lower aboveground biomass production. Our study demonstrates that switchgrass can be implemented at a commercial scale without negatively impacting the hydrological cycle, while potentially reducing N losses through nitrate-N leaching and soil N2O emissions, and enhancing belowground C storage.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"576-589"},"PeriodicalIF":2.2,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.70025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Greenhouse gas emissions under perennial bioenergy crops with various nitrogen fertilization rates 不同施氮量下多年生生物能源作物的温室气体排放

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2025-04-20 DOI: 10.1002/jeq2.70021

Upendra M. Sainju, Brett L. Allen, Sadikshya R. Dangi

{"title":"Greenhouse gas emissions under perennial bioenergy crops with various nitrogen fertilization rates","authors":"Upendra M. Sainju, Brett L. Allen, Sadikshya R. Dangi","doi":"10.1002/jeq2.70021","DOIUrl":"https://doi.org/10.1002/jeq2.70021","url":null,"abstract":"Little information exists about greenhouse gas (GHG) emissions under perennial bioenergy crops (PBCs) with various N fertilization rates. Our objectives were to evaluate the effect of PBCs receiving various N fertilization rates on N2O and CH4 emissions, GHG balance (GHGB), and yield-scaled GHGB (YSGB) and compare them with an annual crop from 2012–2013 to 2013–2014 in the northern Great Plains. The PBCs were intermediate wheatgrass (IW, Thinopyrum intermedium [Host] Barkworth and Dewey), smooth bromegrass (SB, Bromus inermis L.), and switchgrass (SG, Panicum virgatum L.), and N fertilization rates were 0, 28, 56, and 84 kg N ha−1. The annual crop was spring wheat (WH, Triticum aestivum L.) with 80 kg N ha−1. The N2O flux peaked immediately after planting, fertilization, intense precipitation (>15 mm), and snowmelt. Cumulative N2O flux was greater for SG than IW and SB with 56 kg N ha−1 in 2012–2013 and with 28–84 kg N ha−1 in 2013–2014. The CH4 flux was not affected by treatments. Carbon sequestration rate at 0–30 cm from 2009 to 2019 was greater for IW than other PBCs. The GHGB and YSGB were greater for SG and SB than IW with almost all N fertilization rates in both years. Comparing PBCs and an annual crop, cumulative N2O flux, GHGB, and YSGB were greater for SG than IW, SB, or WH in 2013–2014. The IW can reduce GHG emissions per unit area and per unit crop yield compared to other PBCs and WH.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"552-562"},"PeriodicalIF":2.2,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.70021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A combination of ion exchange and mechanical methods as a new approach for remediation of water in reservoirs 离子交换法与机械法相结合是水库水体修复的新途径

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2025-04-17 DOI: 10.1002/jeq2.70023

Łukasz Gruss, Piotr Cyganowski

{"title":"A combination of ion exchange and mechanical methods as a new approach for remediation of water in reservoirs","authors":"Łukasz Gruss, Piotr Cyganowski","doi":"10.1002/jeq2.70023","DOIUrl":"https://doi.org/10.1002/jeq2.70023","url":null,"abstract":"This study investigates a novel approach to enhance water quality in reservoirs by combining ion exchange and mechanical methods, including a floating barrier and a quartz sand gravel bed. The aim of the study was to verify the affinity of the Pure PA202 resin for nitrates (NO₃⁻), nitrites (NO₂⁻), and phosphates (PO₄3⁻) ions, as well as to assess the effectiveness of this combined method in removing nutrient contaminants, including changes in dissolved oxygen and chemical oxygen demand (manganese), from a segregated section of a large reservoir. The study employs a styrene-based hydrochloride resin (PA202) in an ion exchange process to remove anionic nutrients such as nitrate nitrogen, nitrite nitrogen, and phosphate phosphorus from surface water. Results indicate a dependence between the sorption capacity of the resin and the valency of the targeted nutrient species, which highlights the importance of considering the chemical nature in water treatment strategies. Furthermore, the study integrates the floating barrier and the quartz sand gravel bed with ion exchange to achieve substantial reductions in nutrient concentrations within the reservoir. The quartz sand gravel bed effectively removes organic nitrogen and ammonium nitrogen, contributing to the overall reduction of nutrient levels with minimal financial expenditure. Considering pump expenditure and the achieved nutrient reduction, the operational costs of the Water Quality Improvement Installation, which incorporates both ion exchange resin and quartz sand gravel filter, remain acceptable. Overall, this research provides valuable insights into innovative water treatment methods, highlighting the importance of integrating ion exchange with mechanical methods for sustainable water management practices in reservoir environments.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"662-680"},"PeriodicalIF":2.2,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Emissions of ammonia and greenhouse gases from broiler chickens can be reduced by growing younger birds 通过饲养幼鸡，可以减少肉鸡的氨和温室气体排放

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2025-04-17 DOI: 10.1002/jeq2.70024

Philip A. Moore Jr., David Horlick, Kelsey Anderson, Hong Li, Dana Miles

{"title":"Emissions of ammonia and greenhouse gases from broiler chickens can be reduced by growing younger birds","authors":"Philip A. Moore Jr., David Horlick, Kelsey Anderson, Hong Li, Dana Miles","doi":"10.1002/jeq2.70024","DOIUrl":"https://doi.org/10.1002/jeq2.70024","url":null,"abstract":"Ammonia (NH3) and greenhouse gas (GHG) emissions from poultry production have become of increasing interest over the past decade. The objectives of this study were (1) to quantify the emissions of NH3, nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2) from poultry houses and (2) to estimate the amount of each gas produced per kilogram of bird grown for flocks of various duration to determine if emissions per kg vary with flock length (i.e., bird marketing age). Two commercial broiler houses in Northwest Arkansas were used for this study. Gas concentrations and emissions were measured during 4-week flocks (n = 12), 7-week flocks (n = 3), and 8-week flocks (n = 4). Average emissions per kg bird for the 4-week flocks were 2.9 g NH3 kg−1, 0.3 g N2O kg−1, 3.5 g CH4 kg−1, and 658 g CO2 kg−1. Ammonia emissions per kg bird increased by 179% and 293% for 7- and 8-week-old birds, respectively, compared to the 4-week-old birds. Nitrous oxide emissions per kg bird increased by 164% and 387% for 7- and 8-week birds, respectively. Methane emissions increased by 35% and 225% for 7- and 8-week-old birds, respectively. Carbon dioxide emissions increased by 185% and 351% for 7- and 8-week-old birds, respectively. Higher emissions from older birds were likely due to less efficient feed conversion as birds age. These results indicate that growing younger (i.e., smaller) chickens may be more sustainable, since it results in much lower emissions of NH3 and GHGs per kg of bird produced, while also utilizing much less feed and being more efficient.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"538-551"},"PeriodicalIF":2.2,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating the potential for snowmelt phosphorus losses from perennial forage crops. 评估多年生饲料作物融雪磷流失的可能性。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2025-04-15 DOI: 10.1002/jeq2.70022

Henry Wilson, Jane Elliott, Merrin Macrae, Vivekananthan Kokulan, Aaron Glenn

{"title":"Evaluating the potential for snowmelt phosphorus losses from perennial forage crops.","authors":"Henry Wilson, Jane Elliott, Merrin Macrae, Vivekananthan Kokulan, Aaron Glenn","doi":"10.1002/jeq2.70022","DOIUrl":"https://doi.org/10.1002/jeq2.70022","url":null,"abstract":"In cold regions, there is concern that losses of P with snowmelt runoff following freeze and thaw of vegetation may be greater from perennial forages relative to annual crops. We evaluate the drivers of P losses with snowmelt runoff over a network of field-scale small watersheds in Manitoba, Canada, following annual crops (59 site-years), perennial forage (19 site-years), or tillage to terminate a forage (4 site-years). Vegetation type was not significantly related to concentrations of P lost in snowmelt or load (p > 0.05), and 0-5 cm Olsen-P in soil was the best predictor of flow-weighted mean concentrations of total dissolved P (r2 = 0.46, p < 0.001) and total P (r2 = 0.45, p < 0.001) across the 82 site-years of data. Sites having a recent (10-year) land use history without tillage had greater P stratification in the top 5 cm of soil than those with tillage, irrespective of vegetation type (p < 0.001). Residual variation in snowmelt P concentration and loads were negatively related to water yield and positively related to proportion of soil surface area covered by crop residue (independent of type of residue). Loads of P exported with snowmelt were primarily a function of water yield, and at a similar level of snow water equivalent, perennial forages exhibit lower water yield than annual crop sites. These results suggest that with careful management of soil P, adding perennial plants to crop rotations will not increase losses of P with snowmelt and through impacts on hydrology, reductions in overall loading may occur.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144028240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heavy metal accumulation and transfer between soils–plants–goats in a Mo-mining area 钼矿区土壤-植物-山羊间重金属积累与迁移

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2025-04-10 DOI: 10.1002/jeq2.70020

Liping Li, Difeng Wu, James A. Ippolito, Weiqin Xing, Yali Wang, Yale Wang, Yongqiang Yang

{"title":"Heavy metal accumulation and transfer between soils–plants–goats in a Mo-mining area","authors":"Liping Li, Difeng Wu, James A. Ippolito, Weiqin Xing, Yali Wang, Yale Wang, Yongqiang Yang","doi":"10.1002/jeq2.70020","DOIUrl":"https://doi.org/10.1002/jeq2.70020","url":null,"abstract":"The effect of Mo mining on soil–plant–animal ecosystem heavy metal accumulation and migration has not been well investigated. In this work, soil, native plants, and goat hair samples were collected from mining, urban, and rural areas near a Mo-mining area in Luanchuan, China and analyzed for Mo, Pb, Cd, Cu, Zn, Ni, and Mn concentrations. Molybdenum had the largest pollution indices (soil heavy metal concentration/background value) among all metals. Although mining area soil had greater concentrations of all seven metals as compared to urban and rural areas, significant differences were only found for Cd (mining, 2.54; urban, 1.59; and rural, 1.85 mg kg−1), Cu (73.4, 32.1, and 32.6 mg kg−1), and Mo (109, 33.6, and 16.6 mg kg−1). Setaria viridis had greater Mo concentrations in the mining area than the urban area, most plant samples had Mo concentrations >5 mg kg−1, and mean plant Cu:Mo ratios were <4 in all three areas, both indicating potential Mo toxicity and Cu deficiency risks to herbivores. Goat hair Mo concentrations in both areas were greater, whereas the Cu:Mo ratios were lower than those found in the literature. Plants had greater bioconcentration factors (0.840–5.30) for soil Mo than other metals, whereas goat hair and grass Mo concentration ratios were <0.03, lower than most reported literature values. Results indicate Mo accumulation in soil, plants, and goat hair in the Mo-mining area; remediation measures may be needed to alleviate animal and potentially resident Mo stress.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"681-693"},"PeriodicalIF":2.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analyzing the effect of lake dredged material from the Western Lake Erie Basin on soil properties and corn health 分析伊利湖流域西部疏浚物对土壤性质和玉米健康的影响

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2025-04-09 DOI: 10.1002/jeq2.70015

Shikshya Gautam, Zhaohui Xu, Junfeng Shang, Angélica Vázquez-Ortega

{"title":"Analyzing the effect of lake dredged material from the Western Lake Erie Basin on soil properties and corn health","authors":"Shikshya Gautam, Zhaohui Xu, Junfeng Shang, Angélica Vázquez-Ortega","doi":"10.1002/jeq2.70015","DOIUrl":"https://doi.org/10.1002/jeq2.70015","url":null,"abstract":"US lakes and federal navigation channels are dredged yearly to maintain the economic activity of ports and harbors, and about 1.5 million cubic yards (about 1.1 million m3) of dredged material (DM) is excavated from the Western Lake Erie Basin in Ohio. After the prohibition of open water disposal of DM, the State of Ohio is recommending finding beneficial uses, including amending farm soils. This research investigated whether the different ratios of DM amending an organic farm soil enhance the soil properties, corn (Zea mays) health, and crop yield. We did a greenhouse experiment for 122 days, and our soil blends consisted of 100% farm soil, 100% DM, 95% farm soil + 5% DM, 90% farm soil + 10% DM, and 80% farm soil + 20% DM. Our results indicated that as the DM ratio increased, the cation exchange capacity (20–37 meq 100 g−1), soil calcium (2880–6400 mg kg−1), and soil total phosphorus (710–1060 mg kg−1) increased, but the soil bulk density value (0.8–0.6 mg cm−3) decreased slightly. The above (11–37 g) and below (1–3.7 g) corn biomass weights were higher as the DM ratio increased. The highest corn yield was observed in 100% DM (12.7–46.8 g). These findings demonstrate that DM has the potential to be used as an agricultural farm soil substrate.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"621-633"},"PeriodicalIF":2.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimates of black carbon emissions from global biomass burning for the period 1997–2023 1997-2023年全球生物质燃烧产生的黑碳排放量估算

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2025-04-09 DOI: 10.1002/jeq2.70019

Mingyu Yao, Junyu Fan, Xuexin Li, Yu Zhang, Qi Jing, Afeng Chen

{"title":"Estimates of black carbon emissions from global biomass burning for the period 1997–2023","authors":"Mingyu Yao, Junyu Fan, Xuexin Li, Yu Zhang, Qi Jing, Afeng Chen","doi":"10.1002/jeq2.70019","DOIUrl":"https://doi.org/10.1002/jeq2.70019","url":null,"abstract":"Estimating black carbon (BC) emissions from biomass burning is crucial for accurately assessing the climate impact of this pollutant. In this study, we have estimated BC emissions from biomass burning in different geographic regions worldwide at a resolution of 0.25° × 0.25° from 1997 to 2023. These findings are crucial for accurately modeling the impact of BC on global climatic forcing. Over the past 27 years, the emissions of BC from global biomass burning activities have remained stable. The high BC emissions between 2003 and 2008 were associated with increased precipitation. The Southern Hemisphere South America (SHSA) and Southern Hemisphere Africa (SHAF) regions have emerged as the primary contributors, accounting for approximately 40% of total BC emissions originating from global biomass burning sources and high BC emissions in the southern hemisphere's spring. This study also reveals that BC emissions in the SHAF region during 1997–2023 exhibit a granger causal relationship with Antarctic sea ice loss at a 2-year lag, but the impact intensity demonstrates significant temporal heterogeneity. This study enhances our understanding of temporal and spatial variations in global BC release caused by biomass burning while providing fundamental data for international departments responsible for managing such activities.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"528-537"},"PeriodicalIF":2.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatiotemporal trends of Escherichia coli levels and their influences vary among ponds in the coastal plain of Georgia 乔治亚州沿海平原池塘中大肠杆菌水平的时空变化趋势及其影响存在差异。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2025-03-31 DOI: 10.1002/jeq2.70018

J. Andrew Widmer, Matthew Stocker, Jaclyn E. Smith, Alisa Coffin, Oliva Pisani, Timothy Strickland, Manan Sharma, Yakov Pachepsky, Laurel L. Dunn

{"title":"Spatiotemporal trends of Escherichia coli levels and their influences vary among ponds in the coastal plain of Georgia","authors":"J. Andrew Widmer, Matthew Stocker, Jaclyn E. Smith, Alisa Coffin, Oliva Pisani, Timothy Strickland, Manan Sharma, Yakov Pachepsky, Laurel L. Dunn","doi":"10.1002/jeq2.70018","DOIUrl":"10.1002/jeq2.70018","url":null,"abstract":"Quantification of Escherichia coli in water is commonly used to understand a surface source's suitability for produce irrigation. Location, season, and physicochemical water quality impact the levels of E. coli in irrigation ponds. Water samples were collected periodically at three ponds in Southeast Georgia along a sampling grid from July 2021 through September 2023 and quantified for E. coli with simultaneous collection of relevant water physicochemical parameters. Mean relative differences (MRDs) were calculated for each collection point to determine differences in E. coli levels across sampling locations. E. coli levels varied significantly across sampling area (perimeter, surface, and subsurface) at each pond. The log most probable number E. coli 100 mL−1 (EC MRD) values ranged from −0.25 to 0.33 in Pond 1, −1.5 to 0.65 in Pond 2, and −1.25 to 0.65 in Pond 3. In Pond 1, EC MRD correlated positively with chlorophyll and turbidity, and negatively with dissolved organic matter, dissolved oxygen (DO), specific conductance, and pH MRDs. In Pond 2, the MRD of E. coli correlated with the MRDs of chlorophyll, DO, phycocyanin, pH, and temperature. In Pond 3, E. coli MRD correlated positively with nitrate MRD. This work showed MRD analysis may reveal stable patterns of E. coli and the physicochemical factors that impact these levels in ponds, though no universal covariates were identified that could estimate E. coli levels. These findings may provide context for water quality managers wishing to augment measurements of E. coli with other factors, or better represent variable E. coli levels with MRD.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"54 3","pages":"647-661"},"PeriodicalIF":2.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jeq2.70018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143752901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Connecting the soil health-water quality nexus under surface-irrigated conservation tillage. 连接地表灌溉保持耕作下的土壤健康-水质关系。

IF 2.2 4区环境科学与生态学

Journal of environmental quality Pub Date : 2025-03-27 DOI: 10.1002/jeq2.70013

Tad Trimarco, R Daren Harmel, Erik Wardle, Cassidy Buchanan, Ansley Brown, Emmanuel Deleon, Troy Bauder, James A Ippolito

{"title":"Connecting the soil health-water quality nexus under surface-irrigated conservation tillage.","authors":"Tad Trimarco, R Daren Harmel, Erik Wardle, Cassidy Buchanan, Ansley Brown, Emmanuel Deleon, Troy Bauder, James A Ippolito","doi":"10.1002/jeq2.70013","DOIUrl":"https://doi.org/10.1002/jeq2.70013","url":null,"abstract":"Intense tillage degrades soil health, worsens soil structure, and accelerates nutrient and sediment transport to vulnerable water bodies. Unfortunately, few studies have measured both soil health and water quality under conservation tillage, particularly in semi-arid furrow-irrigated fields, limiting our understanding of tillage impacts in these systems. To address this research gap, we investigated the impact of three tillage types (conventional tillage [CT], strip tillage [ST], and minimum tillage [MT]) on soil health and water quality on large research plots. Specifically, we measured 10 soil health indicators under the Soil Management Assessment Framework, soil organic C fractionations, and six edge-of-field runoff water quality indicators over 2 years. Edge-of-field water quality was improved in ST and MT plots as compared to CT, with reductions in mean concentrations for particulate constituents (sediment and total Kjeldahl N) approaching approximately 50% or greater. Additionally, indicators of physical soil health (bulk density and water-stable aggregates) and biological soil health (microbial biomass C, soil organic C, potentially mineralizable N, and particulate organic matter C) correlated to decreased concentrations of water quality pollutants. This trend was most pronounced for particulate constituents (e.g., sediment, total Kjeldahl N), which were correlated to indicators of aggregate stability. Furthermore, the lack of difference between ST and MT plots with regards to water quality, soil health, and crop yield indicated that there was little difference between ST and MT. In semi-arid furrow-irrigated fields, we suggest utilizing reduced tillage practices to limit offsite sediment loss, nutrient transport, and environmental degradation.","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0