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
dc.contributor.author Singh, Jessica
dc.date.accessioned 2016-05-11T13:13:59Z
dc.date.available 2016-05-11T13:13:59Z
dc.date.copyright 2016-05
dc.date.created 2016-04-27
dc.date.issued 2016-05-11
dc.identifier.uri http://hdl.handle.net/10214/9647
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.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
dc.degree.programme Environmental Sciences en_US
dc.degree.name Master of Science en_US
dc.degree.department 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.


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