Main content

The Effect of Including Legumes in Dairy Crop Rotations on Nitrous Oxide Emissions

Show simple item record

dc.contributor.advisor Wagner-Riddle, Claudia
dc.contributor.advisor VanderZaag, Andrew Singh, Jessica 2016-05-11T13:13:59Z 2016-05-11T13:13:59Z 2016-05 2016-04-27 2016-05-11
dc.description.abstract This study examined whether substituting legumes for corn in dairy crop rotations could reduce N2O emissions. This was done by measuring the surface N2O emissions of four different two-year crop rotation treatments: corn-corn, corn (+cover crop)-corn, soybean-corn, and alfalfa-alfalfa over an 18 month period (May 1, 2014-Oct. 31, 2015) on sandy loam and clay soils. Emissions of dissolved N2O in subsurface tile drains in the clay soil were also measured for eight months (March 20, 2015-October 31, 2015) to determine the contribution of dissolved N2O to total N2O emissions as well as the effect of crop rotations on dissolved N2O emissions. In the sandy loam soil, alfalfa and soybeans had the lowest growing season N2O emissions (9.6 and 10.6 g ha-1 d-1, respectively), and alfalfa had the lowest annual emissions over two years at 3.0 and 3.6 kg N2O-N ha-1 yr-1. In the clay soil, the alfalfa had 3-4 times lower soil-surface N2O emissions than the other treatments in the second growing season only. Non-growing season emissions accounted for 56% of annual N2O emissions. Subsurface emissions accounted for 0.4% of N2O emissions over an eight month period and followed the same treatment effects as the clay soil surface emissions. This study suggests it is possible to reduce N2O emissions by substituting legumes for corn, especially when combined with the appropriate soil type; however, reductions can be negated by management practices that increase non-growing season emissions. en_US
dc.language.iso en en_US
dc.publisher University of Guelph en_US
dc.subject greenhouse gas emissions en_US
dc.subject nitrous oxide en_US
dc.subject N2O en_US
dc.subject dairy crop rotation en_US
dc.subject dissolved nitrous oxide en_US
dc.title The Effect of Including Legumes in Dairy Crop Rotations on Nitrous Oxide Emissions en_US
dc.type Thesis en_US Environmental Sciences en_US Master of Science en_US School of Environmental Sciences en_US
dc.rights.license All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated. University of Guelph en_US

Files in this item

Files Size Format View Description
Singh_Jessica_201605_MSc.pdf 2.659Mb PDF View/Open MSc. Thesis

This item appears in the following Collection(s)

Show simple item record

The library is committed to ensuring that members of our user community with disabilities have equal access to our services and resources and that their dignity and independence is always respected. If you encounter a barrier and/or need an alternate format, please fill out our Library Print and Multimedia Alternate-Format Request Form. Contact us if you’d like to provide feedback:  (email address)