Abstract：
:In northern Florida, year-round forage systems are used in dairy effluent sprayfields to reduce nitrate leaching. Our purpose was to quantify forage N removal and monitor nitrate N (NO3(-)-N) concentration below the rooting zone for two perennial, sod-based, triple-cropping systems over four 12-mo cycles (1996-2000). The soil is an excessively drained Kershaw sand (thermic, uncoated Typic Quartzip-samment). Effluent N rates were 500, 690, and 910 kg ha(-1) per cycle. Differences in N removal between a corn (Zea mays L.)-bermudagrass (Cynodon spp.)-rye (Secale cereale L.) system (CBR) and corn-perennial peanut (Arachis glabrata Benth.)-rye system (CPR) were primarily related to the performance of the perennial forages. Nitrogen removal of corn (125-170 kg ha(-1)) and rye (62-90 kg ha(-1)) was relatively stable between systems and among cycles. The greatest N removal was measured for CBR in the first cycle (408 kg ha(-1)), with the bermudagrass removing an average of 191 kg N ha(-1). In later cycles, N removal for bermudagrass declined because dry matter (DM) yield declined. Yield and N removal of perennial peanut increased over the four cycles. Nitrate N concentrations below the rooting zone were lower for CBR than CPR in the first two cycles, but differences were inconsistent in the latter two. The CBR system maintained low NO3(-)-N leaching in the first cycle when the bermudagrass was the most productive; however, it was not a sustainable system for long-term prevention of NO3(-)-N leaching due to declining bermudagrass yield in subsequent cycles. For CPR, effluent N rates > or = 500 kg ha(-1) yr(-1) have the potential to negatively affect ground water quality.
journal_name
J Environ Qualjournal_title
Journal of environmental qualityauthors
Woodard KR,French EC,Sweat LA,Graetz DA,Sollenberger LE,Macoon B,Portier KM,Rymph SJ,Wade BL,Prine GM,Van Horn HHdoi
10.2134/jeq2003.9960subject
Has Abstractpub_date
2003-05-01 00:00:00pages
996-1007issue
3eissn
0047-2425issn
1537-2537journal_volume
32pub_type
杂志文章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
pub_type： 杂志文章,评审
doi：10.2134/jeq2007.0177
更新日期：2008-02-11 00:00:00
abstract：:This study was undertaken to determine the fate of As, Mo, and V (trace elements, TEs) in the sediments of a constructed wetland in use for the remediation of potentially toxic trace element-contaminated agricultural drainwater. After three years of wetland operation, sediment cores were collected to determine changes...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2003.2428
更新日期：2003-11-01 00:00:00
abstract：:Coastal aquatic ecosystems are increasingly affected by diffuse source nutrient water pollution from agricultural activities in coastal catchments, even though these ecosystems are important from a social, environmental and economic perspective. To warrant sustainable economic development of coastal regions, we need t...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2011.0400
更新日期：2014-01-01 00:00:00
abstract：:The use of alternative N sources relative to conventional ones could mitigate soil-surface NO emissions. Our objective was to evaluate the effect of anhydrous ammonia (AA), urea, and polymer-coated urea (ESN) on NO emissions for continuous corn ( L.) production. Corn received 110 kg N ha in 2009 and 180 kg N ha in 201...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2013.12.0496
更新日期：2015-03-01 00:00:00
abstract：:Eco-environmental quality assessment (EQA) is an intricate and challenging task that must take into account numerous natural, economic, political, and social factors, which are subject to multiple conflicting criteria. In this paper, a methodological reference framework is developed for EQA that combines the fuzzy Del...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2011.0390
更新日期：2012-09-01 00:00:00
abstract：:Sulfonylurea herbicides are applied at relatively low rates (3 to 40 g ha(-1)) to control weeds in a variety of crops across the Canadian prairies. Because of their high phytotoxicity and the likelihood of their transport in surface runoff, there is concern about their possible impact to aquatic ecosystems. Little is ...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2005.0462
更新日期：2006-10-27 00:00:00
abstract：:High suspended sediment (SPS) concentration commonly exists in many Asian rivers. Furthermore, climate change can cause high floods and lead to the resuspension of sediments and soil erosion, resulting in high SPS concentration in many natural waters. This research studied the impact of the presence of SPS and organic...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2010.0305
更新日期：2011-01-01 00:00:00
abstract：:Theories suggest that rapid microbial growth rates lead to quicker development of metal resistance. We tested these theories by adding hexavalent chromium [Cr(VI)] to soil, sowing Indian mustard (Brassica juncea), and comparing rhizosphere and bulk soil microbial community responses. Four weeks after the initial Cr(VI...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2005.0438
更新日期：2007-04-05 00:00:00
abstract：:Surface application of manure in reduced tillage systems generates nuisance odors, but their management is hindered by a lack of standardized field quantification methods. An investigation was undertaken to evaluate odor emissions associated with various technologies that incorporate manure with minimal soil disturban...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2010.0094
更新日期：2011-03-01 00:00:00
abstract：:The groundwater of Jeju Island (Republic of Korea) is vulnerable to contamination because its aquifers are mainly composed of highly permeable geological units and its agricultural fields are often exposed to excessive use of predominantly synthetic fertilizers. In the Gosan area of Jeju Island, we investigated nitrat...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2011.0417
更新日期：2012-11-01 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
pub_type： 杂志文章
doi：10.2134/jeq2004.1288
更新日期：2004-07-01 00:00:00
abstract：:The occurrence of broad-host-range (BHR) plasmid amplicons belonging to incompatibility (Inc) groups IncA/C, IncN, IncP, and IncW in two wastewater treatment plant (WWTP) effluents and effluent-receiving streams in Northwest Arkansas, Mud Creek and Spring Creek, was determined. Community DNA captured on filter membran...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2010.0228
更新日期：2010-11-01 00:00:00
abstract：:Many soils of the Mediterranean region with a semiarid climate are subjected to progressive degradation as a result of water erosion. Biosolids and municipal solid wastes (MSW) were surface-applied once at three rates (40, 80, and 120 Mg ha(-1)) to different plots in a degraded semiarid ecosystem. The study was conduc...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2003.4720
更新日期：2003-03-01 00:00:00
abstract：:Vegetation that develops spontaneously on metal-contaminated soils presents an opportunity to evaluate both metal bioavailability and the risks posed to biota. The behavior of Cd and Zn in the species of a spontaneously developed woodland, colonizing a canal embankment, has been investigated. Nitric-acid-extractable m...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2006.0218
更新日期：2007-06-27 00:00:00
abstract：:In the relatively pristine ecosystem in Kejimkujik Park, Nova Scotia, methylmercury (MeHg) concentrations in loons, Gavia immer, are among the highest recorded anywhere in the world. This study investigated the influence of bedrock lithology on MeHg concentrations in wetlands. Twenty-five different wetland field sites...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2003.2085
更新日期：2003-11-01 00:00:00
abstract：:Use of organic by-products as soil amendments in agricultural production exemplifies a strategy for converting wastes to resources. The overall objective of this research was to evaluate the short- and intermediate-term effects of repeatedly amending sandy soil with paper mill residuals (PMR) and composted PMR in a ve...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2002.2086
更新日期：2002-11-01 00:00:00
abstract：:Most farms have a centralized location to fill spray tanks with pesticides and to flush and clean application equipment. These sites, depending on the frequency of use, could be significant sources of surface and groundwater contamination. One approach to minimize this contamination is to install a treatment system, s...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2016.04.0124
更新日期：2018-03-01 00:00:00
abstract：:A lignocellulosic substrate (LS) obtained from our local agroindustry was used as a low-cost and effective adsorbent for the removal of pesticides from wastewaters. The studied pesticides were terbumeton (N-(1,1-dimethyl)-Nethyl-6-methoxy-1,3,5-triazine-2,4-diamine), desethyl terbumeton (N-(1,1-dimethylethyl)-6-methox...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2007.0332
更新日期：2008-03-01 00:00:00
abstract：:Manure composting is a common management practice for cattle feedlots, but gaseous emissions from composting are poorly understood. The objective of this study was to quantify ammonia (NH3 ), nitrous oxide (N2 O), carbon dioxide (CO2 ), and methane (CH4 ) emissions from windrow composting (turning) and static stockpil...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.1002/jeq2.20029
更新日期：2020-01-01 00:00:00
abstract：:The aim of this study was to assess the influence of the polycyclic aromatic hydrocarbons (PAH)-degrading activity in the fate of fluoranthene in soils. Three soil samples with different degrading activities (an industrial soil, the same industrial soil after biostimulation, and an agricultural soil) were spiked with ...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2006.0473
更新日期：2007-08-31 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：:Ammonia (NH(3)) emissions from animal systems have become a primary concern for all of livestock production. The purpose of this research was to establish the relationship of nitrogen (N) emissions to specific components of swine production systems and to determine accurate NH(3) emission factors appropriate for the r...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2004.1189
更新日期：2004-07-01 00:00:00
abstract：:The Deckers Creek watershed in northern West Virginia (USA), containing a land area of 166 km2 (63 mi2), has a long history of industrial development and attendant environmental abuses from both land and water pollution practices. The water in Deckers Creek was sampled in 1974 at 29 locations along the main stem and r...
journal_title：Journal of environmental quality
pub_type： 历史文章,杂志文章
doi：10.2134/jeq2003.6540
更新日期：2003-03-01 00:00:00
abstract：:Denitrifying bioreactors are dependent on organic matter supply as a substrate for effective NO removal. In this study, the difference in removal efficiency and side effects when using different organic matter sources and dosing strategies was tested in two field experiments. The organic matter sources tested were woo...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2018.04.0165
更新日期：2019-03-01 00:00:00
abstract：:The interaction of sulfonamide antimicrobial agents with smectite clay minerals and humic acid (HA)-clay complexes was investigated in batch experiments to assess the influence of adsorbed humic acid on sulfonamide sorption. Soil HA-clay complexes were produced at HA:clay ratios of 1:5, 1:50, and 1:100 (w/w). Vibratio...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2008.0274
更新日期：2009-12-30 00:00:00
abstract：:The short life span of many street trees in the Montreal downtown area may be due in part to higher than standard concentrations of trace metals in the tree pit soils. The effects of land use, soil organic matter, and time since tree planting in a given tree pit (soil age) were studied with respect to the total concen...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2013.02.0055
更新日期：2013-09-01 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
pub_type： 杂志文章
doi：10.2134/jeq2002.8700
更新日期：2002-05-01 00:00:00
abstract：:The New York Phosphorus Index (NY-PI) was introduced in 2001 after the release of the state's first Concentrated Animal Feeding Operation (CAFO) Permit that required a nutrient management plan developed in accordance with NRCS standards. The stakeholder-based approach to development of the NY-PI, combined with a requi...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2016.05.0185
更新日期：2017-11-01 00:00:00
abstract：:Chloride contamination of rivers due to nonpoint sources is increasing throughout developed temperate regions due to road salt application in winter. We developed a river-network model of chloride loading to watersheds to estimate road salt application rates and investigated the meteorological factors that control riv...
journal_title：Journal of environmental quality
pub_type： 杂志文章
doi：10.2134/jeq2017.11.0418
更新日期：2018-07-01 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
