Subsurface Application of Manures Slurries for Conservation Tillage and Pasture Soils and Their Impact on the Nitrogen Balance
- 1 March 2011
- journal article
- review article
- Published by Wiley in Journal of Environmental Quality
- Vol. 40 (2), 352-361
- https://doi.org/10.2134/jeq2010.0069
Abstract
Injection of cattle and swine slurries can provide soil incorporation in no-till and perennial forage production. Injection is expected to substantially reduce N loss due to ammonia (NH3) volatilization, but a portion of that N conservation may be offset by greater denitrification and leaching losses. This paper reviews our current knowledge of the impacts of subsurface application of cattle and swine slurries on the N balance and outlines areas where a greater understanding is needed. Several publications have shown that liquid manure injection using disk openers, chisels, or tines can be expected to reduce NH3 emissions by at least 40%, and often by 90% or more, relative to broadcast application. However, the limited number of studies that have also measured denitrification losses have shown that increased denitrification with subsurface application can offset as much as half of the N conserved by reducing NH3 emissions. Because the greenhouse gas nitrous oxide (N2O) is one product of denitrification, the possible increases in N2O emission with injection require further consideration. Subsurface manure application generally does not appear to increase leaching potential when manure is applied at recommended rates. Plant utilization of conserved N was shown in only a portion of the published studies, indicating that further work is needed to better synchronize manure N availability and crop uptake. At this time in the United States, the economic and environmental benefits from reducing losses of N as NH3 are expected to outweigh potential liability from increases in denitrification with subsurface manure application. To fully evaluate the trade-offs among manure application methods, a detailed environmental and agricultural economic assessment is needed to estimate the true costs of potential increases in N2O emissions with manure injection. Copyright © 2011. American Society of Agronomy, Crop Science Society of America, Soil Science Society . American Society of Agronomy, Crop Science Society of America, and Soil Science Society of AmericaKeywords
This publication has 46 references indexed in Scilit:
- Interpretation of results from on-farm experiments: manure-nitrogen recovery on grassland as affected by manure quality and application technique. 1. An agronomic analysisNJAS: Impact in Agricultural and Life Sciences, 2007
- Nitrogen Recovery and Partitioning with Different Rates and Methods of Sidedressed ManureSoil Science Society of America Journal, 2006
- Ammonia emission from field applied manure and its reduction—invited paperEuropean Journal of Agronomy, 2001
- Use of a novel nitrification inhibitor to reduce nitrous oxide emission from 15N‐labelled dairy slurry injected into soilRapid Communications in Mass Spectrometry, 2001
- Nitrogen transformations and ammonia loss following injection and surface application of pig slurry: a laboratory experiment using slurry labelled with 15N-ammoniumThe Journal of Agricultural Science, 2001
- PA—Precision Agriculture: Reduction of Ammonia Emission by Slurry Application TechniquesJournal of Agricultural Engineering Research, 2000
- The Effect of Injector Tine Design on Odour and Ammonia Emissions following Injection of Bio-solids into Arable CroppingJournal of Agricultural Engineering Research, 1998
- Ammonia and Nitrous Oxide Emissions after Landspreading of Slurry as Influenced by Application Technique and Dry Matter‐Reduction. II. Short Term Nitrous Oxide EmissionsJournal of Plant Nutrition and Soil Science, 1997
- Soil Tillage Effects on Ammonia Volatilization from Surface‐Applied or Injected Animal SlurryJournal of Environmental Quality, 1994
- Influence of NH3 Conservation from Dairy Manure on the Yield of Corn1Agronomy Journal, 1981