Response of antibiotics and resistance genes to high-intensity and low-intensity manure management.

abstract：:China's vegetable production has experienced a rapid growth in recent years. Total production amounted to 522.7 million Mg (1 Mg = 10 g) in 2009, which was more than nine times that in 1980 and represented >50% of the world production. Meanwhile, excessive use of animal manures and chemical fertilizers in vegetable fi...

journal_title：Journal of environmental quality

authors： Yan Z,Liu P,Li Y,Ma L,Alva A,Dou Z,Chen Q,Zhang F

更新日期：2013-07-01 00:00:00

abstract：:Sources and molecular composition of dissolved organic matter (DOM) in coastal rivers have been tightly linked with its reactivity and fate, thus influencing element and nutrient cycling. The DOM in coastal rivers is usually sourced from both terrestrial and marine inputs, with further complication by anthropogenic ac...

journal_title：Journal of environmental quality

authors： He D,He C,Li P,Zhang X,Shi Q,Sun Y

更新日期：2019-05-01 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

authors： Jenkins MB,Hartel PG,Olexa TJ,Stuedemann JA

更新日期：2003-01-01 00:00:00

abstract：:The widespread use of chromium (Cr) has a deleterious impact on the environment. A number of pathways, both biotic and abiotic in character, determine the fate and speciation of Cr in soils. Chromium exists in two predominant species in the environment: trivalent [(Cr(III)] and hexavalent [Cr(VI)]. Of these two forms,...

journal_title：Journal of environmental quality

authors： Choppala GK,Bolan NS,Megharaj M,Chen Z,Naidu R

更新日期：2012-07-01 00:00:00

abstract：:There is increasing recognition of the adverse impacts of agricultural practices on microbial water quality leading to increased expectation on farmers to manage environmental impacts on water quality. Therefore, farmers require a tool to help them prioritize mitigations targeted at reducing fecal contamination of sur...

journal_title：Journal of environmental quality

authors： Muirhead R

更新日期：2015-01-01 00:00:00

abstract：:Standard methods for the evaluation of recreational water quality rely on generic bacterial indicators such as . However, does not provide enough information to determine fecal source or public health risk. The stsudy objective was to determine factors influencing the presence of and host-specific markers (HSM) from u...

journal_title：Journal of environmental quality

authors： Gibson KE,Lee JA,Jackson JM,Smith LN,Almeida G

更新日期：2017-09-01 00:00:00

abstract：:This paper reviews trace metal dynamics in floodplain soils using the Elbe floodplains in Germany as an example of extraordinary importance because of the pollution level of its sediments and soils. Trace metal dynamics are determined by processes of retention and release, which are influenced by a number of soil prop...

journal_title：Journal of environmental quality

authors： Schulz-Zunkel C,Krueger F

更新日期：2009-05-20 00:00:00

abstract：:Pig (Sus scrofa domesticus) slurry (PS) is commonly applied as fertilizer to agricultural fields. Knowledge of PS nitrogen content is essential for good management, but PS nitrogen content is highly variable, not only between farms but also within a farm. Laboratory analysis of animal slurries is often expensive and i...

journal_title：Journal of environmental quality

authors： Yagüe MR,Quílez D

更新日期：2012-05-01 00:00:00

abstract：:Operator-controlled and computer-controlled scanning electron microscopy (CCSEM) are used extensively to characterize particulate matter in environmental media. Analysis in a scanning electron microscope (SEM) coupled with chemical extraction is a potentially powerful tool that is capable of determining how various sa...

journal_title：Journal of environmental quality

authors： Hunt A,Johnson DL

更新日期：2011-05-01 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

authors： Wang Z,Zhang T,Tan CS,Qi Z

更新日期：2020-09-01 00:00:00

abstract：:Nitrogen (N) application to crops generally results in increased nitrous oxide (NO) emissions. Commercially available, enhanced-efficiency N fertilizers were evaluated for their potential to reduce NO emissions from a clay loam soil compared with conventionally used granular urea and urea-ammonium nitrate (UAN) fertil...

journal_title：Journal of environmental quality

authors： Halvorson AD,Del Grosso SJ,Jantalia CP

更新日期：2011-11-01 00:00:00

abstract：:Although many studies have pointed out the various controlling factors of sediment and nutrient delivery on a plot or watershed scale, little is known on the spatial variability of sediment and nutrient delivery on a regional scale. This study was conducted to reveal regional variations in sediment-associated nutrient...

journal_title：Journal of environmental quality

authors： Verstraeten G,Poesen J

更新日期：2002-05-01 00:00:00

abstract：:This study examined the extent to which development and road salting has affected Connecticut's groundwater. We gathered water quality data from different time periods between 1894 and the present and analyzed the data using maps generated with ESRI ArcGIS. Historical reports illustrate a statewide baseline trend of d...

journal_title：Journal of environmental quality

authors： Cassanelli JP,Robbins GA

更新日期：2013-05-01 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

authors： Woodward EE,Andrews DM,Williams CF,Watson JE

更新日期：2014-11-01 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

authors： Scheckel KG,Ryan JA

更新日期：2004-07-01 00:00:00

abstract：:Although the reduction of nutrient loading between uplands and streams is sometimes considered evidence of the effect of wetlands acting as buffer zones, the influence of valley bottom wetlands (VBWs) on NO(3)(-) loading has seldom been assessed at the catchment scale. The objective of this study was to quantify the i...

journal_title：Journal of environmental quality

authors： Montreuil O,Merot P

更新日期：2006-10-27 00:00:00

abstract：:Placement strategies for P fertilizer can affect P availability to crops and influence the amounts and forms of P removed from soil in runoff, contributing to eutrophication. On the Canadian prairies, most runoff occurs during snowmelt. Two adjacent farm fields in Saskatchewan, Canada, were used to assess the effects ...

journal_title：Journal of environmental quality

authors： Wiens JT,Cade-Menun BJ,Weiseth B,Schoenau JJ

更新日期：2019-05-01 00:00:00

abstract：:It is generally recognized that soil N(2)O emissions can exhibit pronounced day-to-day variations; however, measurements of soil N(2)O flux with soil chambers typically are done only at discrete points in time. This study evaluated the impact of sampling frequency on the precision of cumulative N(2)O flux estimates ca...

journal_title：Journal of environmental quality

authors： Parkin TB

更新日期：2008-06-23 00:00:00

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

authors： Hristov AN,Zaman S,Vander Pol M,Ndegwa P,Campbell L,Silva S

更新日期：2009-10-29 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

authors： David MB,Gentry LE,Mitchell CA

更新日期：2016-07-01 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

authors： Hou Q,Young LJ,Brandle JR,Schoeneberger MM

更新日期：2011-05-01 00:00:00

abstract：:The management of artificially drained organic soils is a very important issue, since the accelerated mineralization and sometimes peat fires alter physical and chemical properties of soils and the availability of plant nutrients. This study was performed to determine relatively short- and long-term effects of peat fi...

journal_title：Journal of environmental quality

authors： Dikici H,Yilmaz CH

更新日期：2006-04-03 00:00:00

abstract：:Nitrate lost from agricultural soils is an economic cost to producers, an environmental concern when it enters rivers and lakes, and a health risk when it enters wells and aquifers used for drinking water. Planting a winter wheat cover crop (CC) and/or use of controlled tile drainage-subirrigation (CDS) may reduce los...

journal_title：Journal of environmental quality

authors： Drury CF,Tan CS,Welacky TW,Reynolds WD,Zhang TQ,Oloya TO,McLaughlin NB,Gaynor JD

更新日期：2014-03-01 00:00:00

abstract：:Batch sequential extraction techniques for fractionating metals or metalloids in soils are time consuming and subject to several potential errors. The development of a continuous-flow sequential extraction method for soil As is described and assessed, having the benefits of simplicity, rapidity, less risk of contamina...

journal_title：Journal of environmental quality

authors： Shiowatana J,McLaren RG,Chanmekha N,Samphao A

更新日期：2001-11-01 00:00:00

abstract：:Is nitrate harmful to humans? Are the current limits for nitrate concentration in drinking water justified by science? There is substantial disagreement among scientists over the interpretation of evidence on the issue. There are two main health issues: the linkage between nitrate and (i) infant methaemoglobinaemia, a...

journal_title：Journal of environmental quality

authors： Powlson DS,Addiscott TM,Benjamin N,Cassman KG,de Kok TM,van Grinsven H,L'Hirondel JL,Avery AA,van Kessel C

更新日期：2008-02-11 00:00:00

abstract：:This study investigated the ability of a 10-yr-old constructed wetland to treat metal-contaminated leachate emanating from a coal ash pile at the Widows Creek electric utility, Alabama (USA). The two vegetated cells, which were dominated by cattail (Typha latifolia L.) and soft rush (Juncus effusus L.), were very effe...

journal_title：Journal of environmental quality

authors： Ye ZH,Whiting SN,Qian JH,Lytle CM,Lin ZQ,Terry N

更新日期：2001-09-01 00:00:00

abstract：:Agriculture in the midwestern United States is a major anthropogenic source of nitrous oxide (NO) and is both a source and sink for methane (CH), but the degree to which cropping systems differ in emissions of these gases is not well understood. Our objectives were to determine if fluxes of NO and CH varied among crop...

journal_title：Journal of environmental quality

authors： Osterholz WR,Kucharik CJ,Hedtcke JL,Posner JL

更新日期：2014-11-01 00:00:00

abstract：:Phosphate treatments can reduce metal dissolution and transport from contaminated soils. However, diammonium phosphate (DAP) has not been extensively tested as a chemical immobilization treatment. This study was conducted to evaluate DAP as a chemical immobilization treatment and to investigate potential solids contro...

journal_title：Journal of environmental quality

authors： McGowen SL,Basta NT,Brown GO

更新日期：2001-03-01 00:00:00

abstract：:Pesticide transport through the unsaturated zone is a function of chemical and soil characteristics, application, and water recharge rate. The fate and transport of 82 pesticides and degradates were investigated at five different agricultural sites. Atrazine and metolachlor, as well as several of the degradates of atr...

journal_title：Journal of environmental quality

authors： Hancock TC,Sandstrom MW,Vogel JR,Webb RM,Bayless ER,Barbash JE

更新日期：2008-05-02 00:00:00

abstract：:Shifts in precipitation regimes due to the predicted climate changes can alter the water content in tropical soils and, consequently, may influence the toxicity of pesticides to soil fauna. This study assessed the influence of soil moisture content on the toxicity of the insecticide imidacloprid to the collembolans Fo...

journal_title：Journal of environmental quality

authors： Braúlio Hennig T,Ogliari Bandeira F,Dalpasquale AJ,Cardoso EJBN,Baretta D,Lopes Alves PR

更新日期：2020-11-01 00:00:00