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Your search keyword '"Gaseous N loss"' showing total 2 results
Start Over Descriptor "Gaseous N loss" Topic ammonia volatilization
2 results on '"Gaseous N loss"'

1. Nitrification inhibitor nitrapyrin does not affect yield-scaled nitrous oxide emissions in a tropical grassland

Author

Jorge Alberto Elizondo Salazar, Azam Borzouei, Mohammad Zaman, Ronny Barboza Mora, Ana Gabriela Pérez Castillo, Christoph Müller, Dong-Gill Kim, Khadim Dawar, Alberto Sanz Cobena, and Isabel Cristina Chinchilla Soto

Subjects
Costa Rica, NITRIFICACION, AGRICULTURA TROPICAL, Soil Science, chemistry.chemical_element, 010501 environmental sciences, engineering.material, Ammonia volatilization, Ganadería, 01 natural sciences, Greenhouse gas emission, chemistry.chemical_compound, Ammonia, Animal science, Field trial, Urea, 0105 earth and related environmental sciences, Nitrapyrin, Gaseous N loss, Chemistry, Volatilización amoníaco, 04 agricultural and veterinary sciences, Nitrous oxide, Ammonia volatilization from urea, Nitrogen, 040103 agronomy & agriculture, engineering, 0401 agriculture, forestry, and fisheries, Nitrification, Fertilizer, Óxido nitroso, Andosol
Abstract

Urea is the most common nitrogen (N) fertilizer used in the tropics but it has the risk of high gaseous nitrogen (N) losses. Use of nitrification inhibitor has been suggested as a potential mitigation measure for gaseous N losses in N fertilizer-applied fields. In a field trial on a tropical Andosol pastureland in Costa Rica, gaseous emissions of ammonia (NH3) and nitrous oxide (N2O) and grass yield were quantified from plots treated with urea (U; 41.7 kg N ha-1 application-1) and urea plus the nitrification inhibitor nitrapyrin (U + NI; 41.7 kg N ha-1 application-1 and 350 g of nitrapyrin for each 100 kg of N applied) and control plots (without U and NI) over a six-month period (rainy season). Volatilization of NH3 (August to November) in U (7.4% ±1.3% of N applied) and U + NI (8.1% ±0.9% of N applied) were not significantly different (P > 0.05). Emissions of N2O in U and U + NI from June to November were significantly different (P < 0.05) only in October, when N2O emission in U + NI was higher than that in U. Yield and crude protein production of grass were significantly higher (P < 0.05) in U and U + NI than in the control plots, but they were not significantly different between U and U + NI. There was no significant difference in yield-scaled N2O emission between U (0.31 ±0.10 g N kg-1 dry matter) and U + NI (0.47 ±0.10 g N kg-1 dry matter). The results suggest that nitrapyrin is not a viable mitigation option for gaseous N losses under typical N fertilizer application practices of pasturelands at the study site. Organismo Internacional de Energía Atómica/[No.CRP D1.50.16]/IAEA/Austria Organización de las Naciones Unidas para la Alimentación y la Agricultura/[No.COS5031]/FAO/Italia Universidad de Costa Rica/[802-B7-505]/UCR/Costa Rica Universidad de Costa Rica/[802-B5-138]/UCR/Costa Rica UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro en Investigación en Contaminación Ambiental (CICA) UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Agroalimentarias::Estación Experimental de Ganado Lechero Alfredo Volio Mata (EEAVM)

Published
2021

2. Effects of tomato cannery water forage irrigation on nitrogen and carbon in a clay loam soil

Author

Johns, Mitchell M., Beggs, Robert A., and Crites, Ron W.

Subjects
*SOIL texture, *LOAM soils, *BERMUDA grass, *SOIL permeability, *NITROGEN in soils, *DENITRIFICATION, *IRRIGATION water
Abstract

Abstract: Land application is a common method for treatment and disposal/reuse of process water and solids from food processing in Central Valley California, USA. Application rates are commonly based on N as contamination of ground and surface waters are of environmental concern. Contemporary disposal practices employ a crop to consume the N applied. Tomato processing wastewaters and semi-solid wastes were evaluated using homogeneous soil columns, and long-term monitoring of the cannery land application site. The 105-day outdoor column study included the smectitic field soil of clay loam texture, Bermudagrass, and three cannery water (CW) loading rates and a control (urea) applied weekly. NO3 − and BOD leaching were low during the simulated irrigation season. Based on N grass uptake, leaching losses, and soil N, gaseous N losses were 50, 64, and 61% of the N applied from 313, 471, and 627kgNha−1 CW applications. However, gaseous N losses exceeded N applied by all treatments and included significant native soil N loss ranging from 1500 to 2600kgha−1. N losses indicated a “priming effect” due to mineralizable organics, and a significant decrease in soil C was seen in all treatments. The study results point toward denitrification as the major cause of gaseous N losses where ammonia volatilization was found to be a lessor cause of N loss. Long-term field monitoring results showed greater N impacts from land incorporation of semi-solid wastes than from wastewater irrigation, consistent with the soil column findings. The study demonstrated that CW having high amounts of labile organics applied to a soil of low permeability can result in heightened gaseous N loss rates, especially by denitrification. Gaseous N losses in addition to crop N uptake lessened the possibility of contamination of ground and surface waters. [Copyright &y& Elsevier]

Published
2011
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