Use of a multi-layer column device for study on leachability of nitrate in sludge-amended soils

Luo, Yongming; Qiao, Xianliang; Song, Jian; Christie, Peter; Wong, Ming Hung

doi:10.1016/s0045-6535(03)00486-7

Cited by 27 publications

(8 citation statements)

References 8 publications

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“…A schematic diagram of the soil microcosm system (measuring 60 cm in length and 35 cm in diameter), which was modified from the diagram published by Yu et al (2007) and Luo et al (2003), is shown in Fig. 1.…”

Section: Construction Of Soil Columnsmentioning

confidence: 99%

“…To concessive monitor the soil N dynamic during rice growth season, we modified the experiment device from the diagram published by Luo et al (2003) and Yu et al (2007), and found it was very suitable to study the leaching loss of nutrients as well as hazard materials in soil. The TN in the soil solution from WD treatments was much lower than the TN from FI treatments (Fig.…”

Section: N Dynamics and Leaching In Paddy Soilmentioning

confidence: 99%

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Recovery of 15N-labeled urea and soil nitrogen dynamics as affected by irrigation management and nitrogen application rate in a double rice cropping system

et al. 2010

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A sophisticated soil microcosm system and 15 N-labeled urea were used to investigate nitrogen (N) use efficiency and soil N dynamics in a rice monoculture system in two successive seasons. Topsoil (0 cm-20 cm) and subsoil (20 cm-50 cm) samples were collected from a traditional double rice cropping field in the Jiangxi Province, China, and these soil samples were derived from Quaternary red clay. Treatments were randomly assigned with two irrigation regimes and three N application rates (no application control, 80% traditional rate and 100% traditional rate noted as N0, N1 and N2, respectively). The levels of 15 N recovery of plants, 15 N and N remaining in soil were determined. Moreover, the N dynamic of soil solution from different layers of the soil profile was surveyed. The results showed that the effects of irrigation management and N application rate varied in different rice growing seasons. Irrigation regimes had remarkable effects on grain yield and chemical 15 N fertilizers (CF-15 N) uptake. When compared to flood irrigation (FI), the shallow water depth with wetting and drying (WD) increased grain yield up to 5.7%-20%. Although the highest grain yield was obtained with reduced N application level, both N apparent recovery (NAR) and 15 N use efficiency (the percentage of plant N uptake derived from applied N, % Ndfan) significantly decreased with increasing N inputs. However, the interaction between irrigation management and N application rate on grain yield and N use efficiency (NUE) of CF-15 N were not significant. A survey of soil solutions every 5 days indicated that NH 4 + -N was the main residual form of N, and high NH 4 + -N leaching was observed. When compared to FI, WD decreased vertical NH 4 + -N and TN leaching, especially at 10-50 cm depths of soil profile in the second season. NH 4 + -N was the main N residual form in the soil profile. Therefore, in this study, the WD irrigation regime and reduced rate (N1) was the optimal irrigation and fertilizer management strategy to increase the NUE of CF-N, increase the after effects of CF-15 N, decrease leaching loss of CF-15 N and minimize the shallow groundwater pollution risk, which were all beneficial for the ecological environment.

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Section: Construction Of Soil Columnsmentioning

confidence: 99%

Section: N Dynamics and Leaching In Paddy Soilmentioning

confidence: 99%

Recovery of 15N-labeled urea and soil nitrogen dynamics as affected by irrigation management and nitrogen application rate in a double rice cropping system

et al. 2010

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“…64, 2018, No. 3: 95-101 concentration in the B-amended soil was similar or lower than at sowing, suggesting that most N released from biosolids was taken up by plants, greatly reducing leaching risk (Luo et al 2003). Plant growth, grain yield and N content.…”

Section: Resultsmentioning

confidence: 93%

Ivy pelargonium response to media containing sewage sludge and potato pulp

Zawadzińska¹,

Salachna²

2018

PLANT SOIL ENVIRON

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In a two-year pot experiment, the effect of five growing media on the growth, flowering, decorative value of Pelargonium peltatum cv. Maxime as well as on their uptake of the nutrients and heavy metals were studied. The media were prepared from four composts (made from: sewage sludge 70% or 35%, potato pulp 35%, straw 30% or sawdust 30%) and peat in 1:1, V:V ratio. In the 1<sup>st</sup> year of research 7-month-old composts and in the 2<sup>nd</sup> year 18-month-old composts were used. Plants cultivated in 7-month-old composts showed better growth-related parameters, created more inflorescences and were more decorative than those cultivated in 18-month-old ones. The medium with compost consisting of 70% sewage sludge and 30% straw gave the best results. Composts application increased nutrients and heavy metals content in pelargonium leaves. Heavy metals content was definitely lower than the value considered toxic to plants.

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“…The acrylic sampler has the advantage of being left in place throughout the entire experiment causing minimal disturbance to the local benthic flow patterns (Cappuyns et al 2004;SeebergElverfeldt et al 2005). The porewater collected this way was ready for analysis without the need of further preservation (Luo et al 2003;Seeberg-Elverfeldt et al 2005). Profiles from March and April presented here correspond to the upper limit of the SGD seepage area, since for the other months the porewater profiles were taken within the seepage face, close to the peak discharge ( Fig.…”

Section: Site Description and Sample Collectionmentioning

confidence: 99%

Porewater nitrate profiles in sandy sediments hosting submarine groundwater discharge described by an advection–dispersion-reaction model

Ibánhez¹,

Leote

Rocha³

2010

Biogeochemistry

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In order to separate the effects of reaction from those of transport on vertical porewater concentration profiles of nitrate at an intertidal groundwater seepage site (Ria Formosa, Portugal), a freeboundary solution of an Advection-Dispersion-Reaction (ADR) model was used to describe the shape of NO 3 -concentration profiles collected in situ. The model includes three sequential reaction layers, postulated with basis on the local distribution of the benthic organic C:N ratio and major identifiable changes in concentration gradients with depth. The advective nature of the system was used to propose a mass balance simplification to the constitutive equations permitting a free-boundary solution, which in turn allowed prediction of sediment-water fluxes of NO 3 -. Sensitivity analysis confirmed that in similarly advective-dominated environments, both the porewater concentration distribution and the interfacial fluxes are strongly dependant on seepage rate and benthic reactivity. The model fitted the measured profiles with high correlation (usually higher than 90%), and model-derived sediment-water NO 3 -fluxes were in good agreement to fluxes measured in situ with Lee-type seepage meters (0.9948 slope, R 2 = 0.8672, n = 8). Nitrate oxidation and reduction rates extracted from model fits to the data (10 -2 -10 0 mmol m -2 h -1 ) agreed with literature values. Because dispersive effects are not included in direct mass balances based on the porewater concentrations, the model presented here increases the accuracy of apparent reaction rate estimates and geochemical zonation at Submarine Groundwater Discharge (SGD) sites. The results establish the importance of sandy sediments as reactive interfaces, able to modulate mass transfer of continental-derived contaminants into coastal ecosystems. We suggest that tools such as the one described here might be used to advantage in preparing further experimental studies to elucidate how benthic reactivity affects nitrate distribution and fluxes in sediments affected by SGD.

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Use of a multi-layer column device for study on leachability of nitrate in sludge-amended soils

Cited by 27 publications

References 8 publications

Recovery of 15N-labeled urea and soil nitrogen dynamics as affected by irrigation management and nitrogen application rate in a double rice cropping system

Recovery of 15N-labeled urea and soil nitrogen dynamics as affected by irrigation management and nitrogen application rate in a double rice cropping system

Ivy pelargonium response to media containing sewage sludge and potato pulp

Porewater nitrate profiles in sandy sediments hosting submarine groundwater discharge described by an advection–dispersion-reaction model

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