Abstract:
:Transitional ecotones such as vegetated buffer strips, stream banks, and streambeds retain phosphorus (P) in the immediate surroundings of farmland. Yet the fate of P in these ecotones remains unclear. Our objectives were to (i) test the difference in the P pool composition of soil and sediment between sites surrounded by agriculture and forestry and (ii) test whether specific P pools differ among transitional ecotones. Phosphorus pools (by a modified Hedley fractionation scheme) and the degree of P saturation (DPS) were determined in 33 soil and sediment samples from eight farmland and three forest sites. At farmland sites, total P in soil and sediment was more than twofold higher as compared to forestry sites. The proportion of labile inorganic P (Pi) and the DPS were significantly larger in transitional ecotones close to farmland. We further used normalized values for comparing the respective ecotones at the sites. The deviation of each transitional ecotone relative to the respective site average revealed that the normalized total P concentration and proportions of labile and moderately labile Pi were significantly smaller in bed sediment adjacent to farmland as compared to respective stream bank and buffer strip soil, whereas the stable Ca-Pi proportion was larger. The results reflected a decreased Pi sorption capacity in combination with Pi desorption and transfer of Pi into secondary Ca-Pi minerals in bed sediment. In summary, the influence of agriculture increases labile P pools in soil and sediment, which are then subject to a succession of dynamic processes resulting in a partial loss of Pi to the aqueous phase as well as fixation of Pi in the Ca-Pi pool.
journal_name
J Environ Qualjournal_title
Journal of environmental qualityauthors
Neidhardt H,Achten F,Kern S,Schwientek M,Oelmann Ydoi
10.2134/jeq2019.01.0012subject
Has Abstractpub_date
2019-09-01 00:00:00pages
1325-1335issue
5eissn
0047-2425issn
1537-2537journal_volume
48pub_type
杂志文章abstract::Ammonia is an important air and water pollutant, but the spatial variation in its concentrations presents technical difficulties in accurate determination of ammonia emissions from animal feeding operations. The objectives of this study were to investigate the relationship between ammonia volatilization and delta15N o...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2009.0057
更新日期:2009-10-29 00:00:00
abstract::In many regions, conservation tillage has replaced conventional tilling practices to reduce soil erosion, improve water conservation, and increase soil organic matter. However, tillage can have marked effects on soil properties, specifically nutrient redistribution or stratification in the soil profile. The objective ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2009.0491
更新日期:2010-09-01 00:00:00
abstract::The variations in the quality of floodwaters from the upper Leichhardt River catchment (1113 km), Mount Isa, in northwest Queensland, Australia, were examined to better understand the impact of urban, mining, and industrial activity on receiving waters. Water sampling was conducted during the 2006-2007 wet season and ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2010.0349
更新日期:2013-03-01 00:00:00
abstract::Although many studies have measured denitrification in stream sediments, few have utilized these data with local water column and sediment measurements to develop a predictive model for NO uptake. In this study, sediment denitrification was measured from cores in five streams under various land uses in south-central M...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2013.06.0249
更新日期:2014-05-01 00:00:00
abstract::Biochar has been heralded as an amendment to revitalize degraded soils, improve soil carbon sequestration, increase agronomic productivity, and enter into future carbon trading markets. However, scientific and economic technicalties may limit the ability of biochar to consistently deliver on these expectations. Past r...
journal_title:Journal of environmental quality
pub_type: 杂志文章,评审
doi:10.2134/jeq2011.0069
更新日期:2012-07-01 00:00:00
abstract::An 8-yr field-scale study, 2005 to 2012, investigated effects of agricultural land use on nutrient and sediment losses during snowmelt runoff from four treatment fields in southern Manitoba. In 2005, two fields with a long-term history of annual crop (AC) production were planted to perennial forage (PF), while two oth...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2014.01.0040
更新日期:2014-09-01 00:00:00
abstract::Horse paddocks have been identified as a significant contributor of animal waste nutrients to natural waters; thus, modified paddock management is needed. Because chemical amendments pose a health risk to horses, an alternative for reducing nutrient translocation from manure is to add available organic residues to the...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2016.06.0223
更新日期:2017-01-01 00:00:00
abstract::Bacterial extracellular polymers (BEP) affect the translocation and fate of organic and inorganic pollutants in terrestrial and aquatic ecosystems. In this study, BEP from activated sludge was compared with sludge dissolved organic matter (DOM) in terms of behavior and effects on the mobilization and bioavailability o...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.1540
更新日期:2004-01-01 00:00:00
abstract::Antibiotics may appear in the environment when manure, sewage sludge, and other organic amendments are added to soils. There is concern that the presence of antibiotics in soils may lead to the development of antibiotic-resistant bacteria which may spread to the rest of the environment. This paper aims at evaluating t...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2005.0355
更新日期:2006-05-31 00:00:00
abstract::Fish are commonly used for monitoring the quality of waters receiving pulp mill effluents (PMEs). Isotopic assays of fish tissues have the potential to provide empirical evidence to link an effluent source to exposure. We show in a 45-d factorial laboratory experiment that different exposure pathways lead to isotopic ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2005.0122
更新日期:2006-09-13 00:00:00
abstract::The influence of zoonotic pathogens in animal manure on human health and well-being as a direct or indirect cause of human enteric illness is examined. Available international data are considered, but the study is focused on the developing situation in western Canada, where it is certain there will be further rapid gr...
journal_title:Journal of environmental quality
pub_type: 杂志文章,评审
doi:10.2134/jeq2003.3830
更新日期:2003-03-01 00:00:00
abstract::Intensively managed golf courses are perceived by the public as possibly adding nutrients to surface waters via surface transport. An experiment was designed to determine the transport of nitrate N and phosphate P from simulated golf course fairways of 'Tifway' bermudagrass [Cynodon dactylon (L.) Pers.]. Fertilizer tr...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2002.1710
更新日期:2002-09-01 00:00:00
abstract::Atmospheric deposition samples were collected over 15 mo at several locations near an operating smelter and an abandoned Pb smelter to investigate the contribution of Pb smelting to depositional fluxes and potential local air quality degradation. Samples were analyzed for As, Cd, Cu, Pb, and Zn and subjected to scanni...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.1002/jeq2.20151
更新日期:2020-11-01 00:00:00
abstract::There is interest in understanding effects of amending soil with manure in a cultivation setting and if composting can provide benefits. Raw or composted manure from cattle administered with and without sulfamethazine, chlortetracycline, and tylosin was amended to loamy sand and silty clay loam soils, where lettuce ( ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2018.02.0078
更新日期:2018-11-01 00:00:00
abstract::This study compares two methods of dairy manure application-surface broadcast and shallow disk injection-on the fate and transport of natural estrogens in surface runoff from 12 field plots in central Pennsylvania. Ten natural surface runoff events were sampled over a 9-mo period after fall manure application. Results...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2016.05.0173
更新日期:2016-11-01 00:00:00
abstract::Growing nitrogen (N) catch crops can reduce NO(3)-N leaching after cultivating cereals. The objective of this study was to relate NO(3)-N leaching to variation in the uptake of N and the size and distribution of the root systems of different catch crops species. In a 3-yr lysimeter experiment, phacelia (Phacelia tanac...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2009.0306
更新日期:2010-04-13 00:00:00
abstract::Accretion of organic matter in wetlands provides long-term storage for nutrients and other contaminants. Water-table fluctuations and resulting alternate flooded and drained conditions may substantially alter the stability of stored materials including phosphorus (P). To study the effects of hydrologic fluctuation on ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2001.302668x
更新日期:2001-03-01 00:00:00
abstract::Phosphorus (P) losses from nonpoint sources into surface water resources through surface runoff and tile drainage play a significant role in eutrophication. Accordingly, the number of studies involving the modeling of agricultural P losses, the uncertainties of such models, and the best management practices (BMPs) sup...
journal_title:Journal of environmental quality
pub_type: 杂志文章,评审
doi:10.1002/jeq2.20109
更新日期:2020-09-01 00:00:00
abstract::High levels of fecal bacteria are a concern for recreational waters; however, the source of contamination is often unknown. This study investigated whether direct sequencing of a bacterial gene could be utilized for detecting genetic differences between bacterial strains for microbial source tracking. A 525-nucleotide...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.1024
更新日期:2004-05-01 00:00:00
abstract::Isotopically exchangeable metals in soil, also termed labile metals, are reversibly bound to soil surface and are a better index of the environmental risk of the metals than are their total concentrations. In this study, labile fractions of potentially toxic elements were surveyed in metal mining-impacted soils of Mex...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.1002/jeq2.20055
更新日期:2020-03-01 00:00:00
abstract::Sediment delivery from hillslopes to rivers is spatially variable and may lead to long-term delays between initial erosion and related sediment yield at the watershed outlet. Consideration of spatial variability is important for developing sound strategies for water quality improvement and soil protection at the water...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2012.0217
更新日期:2014-01-01 00:00:00
abstract::Managing biosolids from end-of-life municipal lagoons is a major challenge for many small communities where landfilling or spreading of biosolids on farmland is restricted. Contaminant removal via phytoextraction may be a viable remediation option for end-of-life lagoons in such communities. This study examined the ef...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2018.06.0230
更新日期:2018-11-01 00:00:00
abstract::Copper sulfate (CuSO4) is applied periodically to commercial channel catfish (Ictalurus panctatus) ponds as an algicide or parasiticide. Current understanding of the chemistry of copper in soil-water systems suggests that copper may accumulate in pond sediments, although the forms and potential bioavailability of copp...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2001.303912x
更新日期:2001-05-01 00:00:00
abstract::Erosion and runoff from pastures may lead to degradation of surface water. A 2-yr grazing study was conducted to quantify the effects of grazing management on sediment, phosphorus (P), and pathogen loading of streams in cool-season grass pastures. Six adjoining 12.1-ha pastures bisected by a stream in central Iowa wer...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2010.0524
更新日期:2011-07-01 00:00:00
abstract::Denitrifying bioreactors using woodchips or other slow-release carbon sources can be an effective method for removing nitrate (NO) from wastewater and tile drainage. However, the ability of these systems to remove fecal microbes from wastewater has been largely uninvestigated. In this study, reductions in fecal indica...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.06.0326
更新日期:2016-05-01 00:00:00
abstract::The Universal Soil Loss Equation (USLE) and its derivatives are widely used for identifying watersheds with a high potential for degrading stream water quality. We compared sediment yields estimated from regional application of the USLE, the automated revised RUSLE2, and five sediment delivery ratio algorithms to meas...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2007.0094
更新日期:2008-01-04 00:00:00
abstract::There is growing interest in the role that urban forests can play as urban microclimate modifiers. Tree shade and evapotranspiration affect energy fluxes and mitigate microclimate conditions, with beneficial effects on human health and outdoor comfort. The aim of this study was to investigate surface temperature () va...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.02.0097
更新日期:2016-01-01 00:00:00
abstract::Based on limited data for the removal of radioactive (99)Tc by freshwater phytoplankton, it has been thought that phytoplankton are unsuitable for remediation of (99)Tc-contaminated waters. This work sought to verify the validity of this assumption by studying the removal of (99)TcO(4)(-) by freshwater and brackish wa...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0045
更新日期:2006-10-27 00:00:00
abstract::Tile drained land with phosphorus (P)-rich topsoil is prone to P loss, which can impair surface water quality via eutrophication. We used by-products from steel and energy industries to mitigate P loss from tile drains. For each by-product, P sorption maximum (P(max)) and strength (k) were determined, while a fluvariu...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2007.0454
更新日期:2008-06-23 00:00:00
abstract::Few effective strategies exist for remediating and restoring metal-contaminated soils. We have evaluated the potential of two environmentally compatible, nondestructive, biological soil-washing agents for remediating aged, lead-contaminated soils. Two contaminated soils were washed with 10 mM rhamnolipid biosurfactant...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2003.8990
更新日期:2003-05-01 00:00:00