The diminishing returns associated with nitrogen (N) fertiliser use over time are well recognised, as are the detrimental effect to the environment of excess N fertiliser use (Eckard 1998). However, many Tasmanian dairy farmers apply continually high rates of N fertiliser (e.g. in excess of 500 kg/ha annually) to minimise risk associated with variable pasture dry matter (DM) yields, and this often occurs at the expense of white clover populations within the pasture (Frame 1990; Frame et al. 1998). The responses of botanical composition and perennial ryegrass DM yields to N fertiliser application rate were investigated in the current field plot study, to provide further information for farmers about the production-related effects of their N use.
History
Publication title
Proceedings of the 22nd International Grasslands Congress: Revitalising Grasslands to Sustain our Communities
Editors
DL Michalk, GD Millar, WB Badgery, KM Broadfoot
Pagination
1513-1514
ISBN
978-1-74256-543-9
Department/School
Tasmanian Institute of Agriculture (TIA)
Publisher
New South Wales Department of Primary Industry
Place of publication
Australia
Event title
22nd International Grasslands Congress
Event Venue
Sydney, Australia
Date of Event (Start Date)
2013-09-15
Date of Event (End Date)
2013-09-19
Rights statement
Copyright 2013 Proceedings of the 22nd International Grassland Congress
Repository Status
Restricted
Socio-economic Objectives
Non-cereal crops (non-cereal crops for hay/silage/green feed)