Abstract:
:Phosphorus (P) budgets for large watersheds are often used to predict trends in riverine P export. To test such predictions, we calculated annual P budgets for 1975-1995 for soils of the Maumee and Sandusky watersheds of northwestern Ohio and compared them with riverine P export from these watersheds. Phosphorus inputs to the soils include fertilizers, manure, rainfall, and sludge while outputs include crop removal and nonpoint-source export via rivers. Annual P inputs decreased due to reductions in fertilizer and manure inputs. Annual outputs increased due to increasing crop yields. Net P accumulation decreased from peak values of 13.4 and 9.5 kg P ha(-1) yr(-1) to 3.7 and 2.6 kg P ha(-1) yr(-1) for the Maumee and Sandusky watersheds, respectively. Thus, P budget analysis suggests that riverine P export should have increased throughout the study period, with smaller increases during more recent years. However, detailed water quality studies show that riverine export of total phosphorus (TP) has decreased by 25 to 40% and soluble reactive phosphorus (SRP) by 60 to 89%, both due primarily to decreases from nonpoint sources. We suggest that these decreases are associated with farmers' adoption of practices that minimize transport of recently applied P fertilizer and of sediments via surface runoff, coupled with changes in winter weather conditions. In comparison with most Midwestern watersheds, rivers draining these watersheds have high unit area yields of TP, low unit area yields of SRP, and high ratios of nonpoint source- to point source-derived P.
journal_name
J Environ Qualjournal_title
Journal of environmental qualityauthors
Baker DB,Richards RPdoi
10.2134/jeq2002.9600subject
Has Abstractpub_date
2002-01-01 00:00:00pages
96-108issue
1eissn
0047-2425issn
1537-2537journal_volume
31pub_type
杂志文章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::The purpose of this study was to determine the response of antibiotics and antibiotic resistance genes (ARG) to manure management. A pilot field study was conducted using horse manure containing no antibiotics, into which chlortetracycline (CTC), tylosin (TYL), and monensin (MON) were spiked and compared to unspiked c...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2007.0006
更新日期:2007-10-16 00:00:00
abstract::The influence of biochar on nitrogen (N) transformation processes in soil is not fully understood. This study assessed the influence of four biochars (wood and poultry manure biochars synthesized at 400 degrees C, nonactivated, and at 550 degrees C, activated, abbreviated as: W400, PM400, W550, PM550, respectively) on...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2009.0138
更新日期:2010-07-01 00:00:00
abstract::Escherichia coli is a ubiquitous component of the intestinal microflora of warm-blooded animals, and is an indicator of fecal contamination of surface waters. Ribotype profiling of E. coli is one of several genotypic methods that has been developed to determine the host origin of fecal bacteria. Like most genotypic me...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2003.3050
更新日期:2003-01-01 00:00:00
abstract::Phosphorus losses from agricultural soils is an important source of P in surface waters leading to surface water quality impairment. In addition to reducing P inputs, mitigation measures are needed to reduce P enrichment of surface waters. Because drainage of agricultural land by pipe drainage is an important pathway ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2012.0344
更新日期:2013-01-01 00:00:00
abstract::Denitrifying bioreactors (DNBRs) harness the natural capacity of microorganisms to convert bioavailable nitrogen (N) into inert nitrogen gas (N) by providing a suitable anaerobic habitat and an organic carbon energy source. Woodchip systems are reported to remove 2 to 22 g N m d, but the potential to enhance denitrifi...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.04.0179
更新日期:2016-05-01 00:00:00
abstract::The state of Iowa requires developing total maximum daily loads (TMDLs) for over 400 water bodies that are listed on the 303(d) list of the impaired waters. The Raccoon River watershed, which covers approximately 9400 km2 of prime agriculture land and represents a typical Midwestern corn-belt region in west-central Io...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2009.0392
更新日期:2010-07-01 00:00:00
abstract::Biosolids can be a source of metals and metal nanoparticles. The objective of this study was to quantify and characterize the accumulation and transport of silver (Ag) in a natural soil that has received agronomically recommended rates of biosolids as fertilizer from 1994 to 2017. Total Ag concentrations were measured...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.1002/jeq2.20156
更新日期:2020-11-01 00:00:00
abstract::Due to its resistance to many wastewater treatment processes, the antiepileptic drug carbamazepine (CBZ) is routinely found in wastewater effluent. Wastewater irrigation is an alternative to stream discharge of wastewater effluent, which utilizes the soil as a tertiary filter to remove excess nutrients and has the pot...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2011.0193
更新日期:2012-07-01 00:00:00
abstract::The immobilization of Pb in contaminated soils as pyromorphite [Pb(5)(PO(4))(3)Cl, OH, F] through the addition of various phosphate amendments has gained much attention in the remediation community. However, it is difficult to fully determine the speciation and amount of soil Pb converted to pyromorphite by previously...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.1288
更新日期:2004-07-01 00:00:00
abstract::Current phytotoxicity plant test protocols for US pesticide registration require testing for effects on seedling emergence and early growth without regard to other important factors, such as plant reproduction. Yield and quality reduction can have significant economic and ecological effects. Therefore, field trials we...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2007.0376
更新日期:2008-10-23 00:00:00
abstract::Agroforestry, the deliberate integration of trees into agricultural operations, sequesters carbon (C) while providing valuable services on agricultural lands. However, methods to quantify present and projected C stocks in these open-grown woody systems are limited. As an initial step to address C accounting in agrofor...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2010.0098
更新日期:2011-05-01 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::There is a need for treatment technologies that can eliminate environmental problems associated with anaerobic lagoons. These technologies must be able to capture nutrients, kill pathogens, and reduce emissions of ammonia and nuisance odors. To meet these needs, a full-scale wastewater treatment plant was installed as...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2005.0035
更新日期:2006-01-03 00:00:00
abstract::Soil contaminated with 2,4,6-trinitrotoluene (TNT) and spiked with [14C]- and [15N3]-TNT was subjected to an anaerobic-aerobic soil slurry treatment and subsequently analyzed by radiocounting and solid-state 15N nuclear magnetic resonance (NMR) spectroscopy. This treatment led to a complete disappearance of extractabl...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2001.302403x
更新日期:2001-03-01 00:00:00
abstract::Surface seeps can be defined as locations where upwelling ground water saturates the surface for most of the year and excess ground water can be delivered to the stream channel via surface flowpaths. If a stream is predominantly fed by seeps, then ground water added to the stream via these surface flowpaths may result...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2009.0083
更新日期:2009-12-30 00:00:00
abstract::In this study, we develop and apply a methodology to reduce an existing monitoring network to find an optimal configuration of a smaller network. We use a criterion based on locally weighted regression with two different weight functions. The methodology is applied to the Dutch national SO2 network and offers the poss...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2002.1210
更新日期:2002-01-01 00:00:00
abstract::Field-scale relationships between soil test phosphorus (STP) and flow-weighted mean concentrations (FWMCs) of dissolved reactive phosphorus (DRP) and total phosphorus (TP) in runoff are essential for modeling phosphorus losses, but are lacking. The objectives of this study were (i) to determine the relationships betwe...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0502
更新日期:2007-07-17 00:00:00
abstract::Quantification of soil carbon (C) cycling as influenced by management practices is needed for C sequestration and soil quality improvement. We evaluated the 10-yr effects of tillage, cropping system, and N source on crop residue and soil C fractions at 0- to 20-cm depth in Decatur silt loam (clayey, kaolinitic, thermi...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2007.0241
更新日期:2008-05-02 00:00:00
abstract::Sulfur received extensive study as an input to terrestrial ecosystems from acidic deposition during the 1980s. With declining S deposition inputs across the eastern United States, there have been many studies evaluating ecosystem response, with the exception of agricultural watersheds. We used long-term (22 and 18 yr)...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.12.0613
更新日期:2016-07-01 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::Beef cattle feedlots emit large amounts of the greenhouse gases (GHG) methane (CH) and nitrous oxide (NO), as well as ammonia (NH), which contributes to NO emission when NH is deposited to land. However, there is a lack of simultaneous, in situ, and nondisturbed measurements of the major GHG gas components from beef c...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2015.06.0278
更新日期:2015-11-01 00:00:00
abstract::In a semiarid environment, climate is a critical factor in the decomposition of surface-applied biosolids. This study examined the effect of 2- to 7-yr exposure times on the composition of single applications of New York, NY biosolids in western Texas. Exposure time effects on organic matter, N, P, S, Cu, Cr, Pb, Hg, ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2003.1773
更新日期:2003-09-01 00:00:00
abstract::Eutrophication of surface waters due to nonpoint source pollution from urban environments has raised awareness of the need to decrease runoff from roads and other impervious surfaces. These concerns have led to precautionary P application restrictions on turf and requirements for vegetative buffer strips. The impacts ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0232
更新日期:2007-01-25 00:00:00
abstract::Transport of phosphorus (P) from agricultural fields to water bodies deteriorates water quality and causes eutrophication. To reduce P losses and optimize P use efficiency by crops, better knowledge is needed of P turnover in soil and the efficiency of best management practices (BMPs). In this review, we examined thes...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2014.04.0165
更新日期:2015-03-01 00:00:00
abstract::Nitrate-nitrogen (NO₃-N) loading to surface water bodies from subsurface drainage is an environmental concern in the midwestern United States. The objective of this study was to investigate the effect of various land covers on NO₃-N loss through subsurface drainage. Land-cover treatments included (i) conventional corn...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2011.0151
更新日期:2011-09-01 00:00:00
abstract::A significant portion of the NO3 from agricultural fields that contaminates surface waters in the Midwest Corn Belt is transported to streams or rivers by subsurface drainage systems or "tiles." Previous research has shown that N fertilizer management alone is not sufficient for reducing NO3 concentrations in subsurfa...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2006.0468
更新日期:2007-08-31 00:00:00
abstract::Seventeen different wastewater sludges were characterized using both chemical and organic matter fractionation methods (water extraction, Van Soest method, and acid hydrolysis) and 6-mo incubation studies to assess their decomposition in soil. Simple correlation and multiple factor analysis (MFA) were then performed t...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2004.1885
更新日期:2004-09-01 00:00:00
abstract::The increase in endocrine-disrupting compounds in the environment has generated research focused on the behavior of these compounds in natural soil and water ecosystems. To understand how estrogens behave in the soil environment as a result of 25+ yr of wastewater irrigation, soils from Penn State's "Living Filter" wa...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2014.04.0153
更新日期:2014-11-01 00:00:00
abstract::Soil organic phosphorus (SOP) can greatly contribute to plant-available P and P nutrition. The study was conducted to determine the effects of organic amendments on organic P fractions and microbiological activities in paddy soils. Samples were collected at the Changshu Agro-ecological Experiment Station in Tahu Lake ...
journal_title:Journal of environmental quality
pub_type: 杂志文章
doi:10.2134/jeq2005.0194
更新日期:2006-05-31 00:00:00