HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Brown, H. A. Articles by Thurtell, G. W. Search for Related Content PubMed Articles by Brown, H. A. Articles by Thurtell, G. W. Agricola Articles by Brown, H. A. Articles by Thurtell, G. W.

Nitrous Oxide Flux from Solid Dairy Manure in Storage as Affected by Water Content and Redox Potential

Dep. of Land Resource Science, Univ. of Guelph, Guelph, ON, Canada, N1G 2W1.

^* Corresponding author (criddle{at}lrs.uoguelph.ca).

ABSTRACT

The current global N₂O budget estimates that animal production contributes one third of agricultural emissions. A study was conducted on solid dairy manure to determine the potential for N₂O emission during storage. A laboratory flow-through chamber and tunable diode laser analyzer were employed to continuously quantify the N₂O flux in a temperature-controlled environment. Water, NO₃-N and NH₄-N contents and redox potential (E_h, using a platinum and Ag-AgCl reference electrode) also were monitored. In Experiment 1, manure samples were collected (4.3 kg wet weight) from three layers near the surface of the pile (0–15, 15–30, and 30–45 cm) and incubated at 22°C for 20 d. The mean daily N₂O-N fluxes were between 0 and 0.33 g N m^–2 d^–1, and N₂O was only generated in samples from the top two layers of the pile. In Experiment 2, samples from the 30- to 45-cm depth were adjusted by amendment with chopped straw to 70, 75, and 80% water content (WC). These samples showed less variable fluxes and produced twice as much N₂O-N as the unamended samples. Levels of straw-amendment had no significant effect on N₂O emissions. Combined results from both experiments revealed that fluxes were highest at 55 to 70% WC and 150 to 250 mV E_h. The N₂O emission was limited by low NO₃-N levels in samples with high WC and low E_h. Increasing WC and decreasing E_h with depth and increasing levels of NO₃ in the surface layer over time revealed that the exterior of solid manure piles is crucial to the flux of N₂O.

This article has been cited by other articles:

				Q. C. Hu, E. van Bochove, J. Warland, B. Kay, and C. Wagner-Riddle New Method to Simulate Soil Freezing and Thawing Cycles for Studying Nitrous Oxide Flux Soil Sci. Soc. Am. J., October 27, 2006; 70(6): 2106 - 2113. [Abstract] [Full Text] [PDF]

				D. N. Miller and E. D. Berry Cattle Feedlot Soil Moisture and Manure Content: I. Impacts on Greenhouse Gases, Odor Compounds, Nitrogen Losses, and Dust J. Environ. Qual., March 1, 2005; 34(2): 644 - 655. [Abstract] [Full Text] [PDF]

				X. Hao, C. Chang, F. J. Larney, and G. R. Travis Greenhouse Gas Emissions during Cattle Feedlot Manure Composting J. Environ. Qual., March 1, 2001; 30(2): 376 - 386. [Abstract] [Full Text] [PDF]