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Effects of temperature and osmotic stress on leaf appearance rate
conference contribution
posted on 2023-05-23, 04:52 authored by Richard RawnsleyRichard Rawnsley, Snare, TA, Lee, G, Peter Lane, Lydia TurnerPlant leaf regrowth stage is widely accepted as the key determinant for grazing interval, however regular monitoring and assessment of leaf appearance rate on farm is often neglected due to time and ambiguity in assessment. Ambient temperature and soil moisture availability are two of the principle factors determining the production and morphology of temperate pasture species. A controlled glasshouse study in which differing moisture stress treatments were applied at different ambient temperatures via a hydroponic culture system, showed that leaf appearance rate of perennial ryegrass (Lolium perenne L.), cocksfoot (Dactylis glomerata L.) and tall fescue (Festuca arundinacea Schreb.) can be successfully estimated using a linear regression model. The model produced from the glasshouse study was evaluated and further developed using historical leaf appearance rate data collated on farm over three years. A simple decision support tool was subsequently developed to quantify the expected leaf appearance rate of these species over the range of ambient temperature and soil moistures that are experienced in the temperate environment.
Funding
Dairy Australia Limited
History
Publication title
Proceedings of the 4th Australasian Dairy Science SymposiumVolume
2010Editors
Grant R Edwards; Racheal Harriet BryantPagination
345-350ISBN
9780864762306Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Lincoln UniversityPlace of publication
Lincoln, New ZealandEvent title
Australasian Dairy Science Symposium: Meeting the Challenges for Pasture-Based DairyingEvent Venue
Lincoln, New ZealandDate of Event (Start Date)
2010-08-31Date of Event (End Date)
2010-09-02Rights statement
Copyright © 2010 DairyNZ and Dairy AustraliaRepository Status
- Restricted