Now showing items 1-10 of 20
Testing large area lysimeter designs to measure leaching under multiple urine patches
(Taylor and Francis Group on behalf of the Royal Society of New Zealand, 2017)
A novel, large area, repacked rectangular shipping container lysimeter (13.8 m² ) was compared with those from undisturbed monolith barrel lysimeters (c. 3.1 m² ), to evaluate their utility for measuring leaching under ...
Italian ryegrass swards reduce N leaching via greater N uptake and lower drainage over perennial ryegrass cultivars varying in cool season growth rates
(Taylor & Francis on behalf of the Royal Society of New Zealand, 2018-02-04)
Pasture mitigation strategies are needed to reduce the negative effects of nitrate (NO₃⁻) leaching from intensive pastoral livestock production systems. We explored the capability of pasture grasses with different cool ...
Influence of plant growth and root architecture of Italian ryegrass (Lolium multiflorum) and tall fescue (Festuca arundinacea) on N recovery during winter
(John Wiley & Sons Ltd, 2015-12)
© 2015 John Wiley & Sons Ltd. Nitrate (NO₃⁻) leaching is an environmental and health concern. In grazed pasture systems, NO₃⁻ leaching primarily occurs beneath animal urine patch areas due to high nitrogen (N) loading and ...
Production, profit and nitrogen flows in irrigated dairy systems representing different industry development pathways: The Pastoral 21 experience in Canterbury
(Taylor & Francis on behalf of the Royal Society of New Zealand, 2020-08-26)
Future development pathways for irrigated dairy farms in Canterbury operating under stricter nitrogen (N) loss limits were compared in two farmlets over four years. One represented the traditional pathway of intensification ...
Identification of nitrate leaching loss indicators through regression methods based on a meta-analysis of lysimeter studies
(Springer-Verlag Berlin Heidelberg, 2016-02)
This study presents a meta-analysis of 12 experiments that quantify nitrate-N leaching losses from grazed pasture systems in alluvial sedimentary soils in Canterbury (New Zealand). Mean measured nitrate-N leached (kg ...
Ammonia oxidisers and their inhibition to reduce nitrogen losses in grazed grassland: a review
(Taylor & Francis on behalf of the Royal Society of New Zealand, 2017-07-31)
Pastoral agriculture is a major source for nitrate (NO₃⁻) contamination in surface and ground waters and for the greenhouse gas N₂O emissions in New Zealand. Advances have been made in recent years in understanding the ...
Improving the sustainability and mitigating environmental impacts of grazed grassland
A poster summarising the authors' research on mitigating NO3 - leaching and N2O emissions from grazed pasture soils using a nitrification inhibitor.
Sowing a winter catch crop can reduce nitrate leaching losses from winter-applied urine under simulated forage grazing: A lysimeter study
(Wiley on behalf of the British Society of Soil Science, 2016-09)
Grazing of winter forage crops is a common management option used in the dairy industry of New Zealand, particularly in the South Island, where they are used to feed nonlactating, pregnant dairy cows prior to calving. ...
Herbage dry-matter yield and nitrogen concentration of grass, legume and herb species grown at different nitrogen-fertiliser rates under irrigation
(CSIRO Publishing, 2017)
An important goal in dairy systems is to increase production while achieving environmental targets associated with lower nitrate leaching from soils. One approach is to identify forages that grow more at a given level of ...
The role of bacteria and archaea in nitrification, nitrate leaching and nitrous oxide emissions in nitrogen-rich grassland soils
(Springer, Dordrecht, 2013)
Nitrate (NO₃⁻) leaching into fresh water and nitrous oxide (N₂O) greenhouse gas emissions are two serious environmental impacts that occur from intensively grazed grassland soils. The oxidation of ammonia (NH₃) to NO₃⁻ is ...