Nitrogen Transformation, Ammonia Volatilization Loss, and Nitrate Leaching in Organically Enhanced Nitrogen Fertilizers Relative to Urea

Singh, Upendra; Sanabria, Joaquin; Austin, E. R.; Agyin‐Birikorang, Sampson

doi:10.2136/sssaj2011.0304

Cited by 30 publications

(19 citation statements)

References 37 publications

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“…Soil sampling was planned to coincide with N 2 O flux sampling. The soils were analysed for NH 4 + -N and NO 3 À -N using an autoanalyser, after 2 M KCl extraction of a 4 mm sieved sample (Singh et al, 2011).…”

Section: Soil Mineral Nmentioning

confidence: 99%

Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation

Bell

Hinton

Cloy

et al. 2015

Agriculture, Ecosystems & Environment

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Section: Soil Mineral Nmentioning

confidence: 99%

Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation

Bell

Hinton

Cloy

et al. 2015

Agriculture, Ecosystems & Environment

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“…Repeated‐measure ANOVA with sampling date as within‐subject factor and mulch and maize as two between‐subject factors (Quinn and Keough, 2002; Singh et al, 2012) was conducted on soil water content, microbial biomass, N mineralization rate, cumulative N mineralization, and NH 4 + and NO 3 − contents within each growing season. We used the Greenhouse–Geisser adjustment when the assumption of sphericity was not met, and the corrected mean square error and associated degrees of freedom were then used in calculating the least significant difference (LSD) values.…”

Section: Statisticsmentioning

confidence: 99%

Plastic Mulch Stimulates Nitrogen Mineralization in Urea‐Amended Soils in a Semiarid Environment

Long

Liu

et al. 2015

Agronomy Journal

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Soil N mineralization is critical for designing appropriate N management strategies, though it has been seldom studied in plasticmulched croplands. We evaluated plastic mulch e ect on N mineralization in urea-amended furrow-ridge plots with and without maize (Zea mays L.) planting at a semiarid rain-fed site, China. Clear lm covered all soil surfaces in the mulched treatments and maize was seeded in furrows in the cropped treatments. Mulch increased daytime soil temperature in the 0 to 15 cm throughout the season without maize but only in the seedling and elongation stages with maize, compared with no mulch. Mulch increased soil moisture in the whole season without maize but only in the early growth with maize, compared with no mulch in 2011. However, the mulch in uence on soil moisture was independent on the presence of maize in 2012. Compared with non-mulched soils, N mineralization rate increased in mulched soils throughout the season in 2011 and 2012. By harvest, in 2011 total N mineralized averaged 112 kg ha -1 in mulched soils, contrasting to 54 kg N ha -1 immobilized in non-mulched soils; in 2012 total N mineralization was 348 kg ha -1 in mulched soils whereas it was 116 kg ha -1 in non-mulched soils. Maize increased N mineralization in the tasseling and silking stages compared with no maize. However, the mulch e ect on N mineralization rate was independent on the presence of maize. We concluded that plastic mulch increased N mineralization in urea-amended soils by increasing soil temperature and moisture.

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“…Some models focus mainly on N uptake and fate in floodwater (Jeon et al, 2004), while others pay more attention to the N transport in soils or describe the N cycle in soils without considering the N transport (Chowdary et al, 2004;Antonopoulos, 2010). In particular, the rhizosphere dynamics of N uptake is very complicated, since it may involve both passive and active uptake (Šimůnek and Hopmans, 2009), as well as other processes such as N mineralization, nitrification-denitrification, and rhizosphere acidity (Singh et al, 2011;Li and Wang, 2013;Najafi, 2013). Meanwhile, rice prefers ammonium (NH 4 + -N) to nitrate (NO 3 − -N) as a source of N (Ishii et al, 2011), and in the presence of both N species, rice seedlings take up NH 4 + -N faster than NO 3 − -N (Sasakawa and Yamamoto, 1978).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of nitrogen balance in a direct-seeded-rice field experiment using Hydrus-1D

Šimůnek

Zhang

et al. 2015

Agricultural Water Management

118

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a b s t r a c tNitrogen (N) pollution is a global environmental problem that has greatly increased the risks of both the eutrophication of surface waters and contamination of ground waters. The majority of N pollution mainly comes from agricultural fields, in particular during rice growing seasons. In recent years, a gradual shift from the transplanting rice cultivation method to the direct seeding method has occurred, which results in different water and N losses from paddy fields and leads to distinct impacts on water environments. The N transport and transformations in an experimental direct-seeded-rice (DSR) field in the Taihu Lake Basin of east China were observed during two consecutive seasons, and simulated using Hydrus-1D model. The observed crop N uptake, ammonia volatilization (AV), N concentrations in soil, and N leaching were used to calibrate and validate the model parameters. The two most important inputs of N, i.e., fertilization and mineralization, were considered in the simulations with 220 and 145.5 kg ha −1 in 2008 and 220 and 147.8 kg ha −1 in 2009, respectively. Ammonia volatilization and nitrate denitrification were the two dominant pathways of N loss, accounting for about 16.0% and 38.8% of the total N input (TNI), respectively. Both nitrification and denitrification processes mainly occurred in the root zone. N leaching at 60 and 120 cm depths accounted for about 6.8% and 2.7% of TNI, respectively. The crop N uptake was 32.1% and 30.8% of TNI during the 2008 and 2009 seasons, respectively, and ammonium was the predominant form (74% of the total N uptake on average). Simulated N concentrations and fluxes in soil matched well with the corresponding observed data. Hydrus-1D could simulate the N transport and transformations in the DSR field, and could thus be a good tool for designing optimal fertilizer management practices in the future.

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Nitrogen Transformation, Ammonia Volatilization Loss, and Nitrate Leaching in Organically Enhanced Nitrogen Fertilizers Relative to Urea

Cited by 30 publications

References 37 publications

Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation

Nitrous oxide emissions from fertilised UK arable soils: Fluxes, emission factors and mitigation

Plastic Mulch Stimulates Nitrogen Mineralization in Urea‐Amended Soils in a Semiarid Environment

Evaluation of nitrogen balance in a direct-seeded-rice field experiment using Hydrus-1D

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