New Zealand Journal of Agricultural Research abstracts
A field comparison of pasture selenium uptake from different forms of selenium fertiliser
R. G. McLaren
L. M. Clucas
Centre for Soil and Environmental Quality
Agriculture and Life Sciences Division
P.O. Box 84, Lincoln University
Canterbury, New Zealand
mclaren@lincoln.ac.nz
Abstract The uptake of selenium (Se) by pasture
herbage from four different Se fertiliser materials was determined in a
field experiment throughout the course of a whole year. The products
tested were: the commercially available Selenium Chip™;
Selcote® Ultra; and two new formulations (Ravensdown A and B),
manufactured in a way to slow the release of Se in the form of sodium
selenate. All four Se fertilisers increased pasture herbage Se
concentrations above the level required to meet the nutritional
requirements of grazing livestock; however, the size and duration of
the responses varied between products. The Ravensdown A product was as
effective as Selcote Ultra at maintaining pasture Se concentrations
above the critical animal health level for the whole year of the trial.
The effects of the other two products, particularly the Selenium Chip,
were not so long-lasting. Recoveries of Se in the pasture herbage
throughout the year ranged between c. 15 and 17% of the Se originally
applied in the fertilisers.
Keywords fertiliser trial; pasture selenium uptake; selenium fertilisers; water-soluble selenium
A05075; Received 19 December 2005; accepted 4 April 2006; Online publication date 4 July 2006
New Zealand Journal of Agricultural Research, 2006, Vol. 49: 227–232
0028–8233/06/4903–227 © The Royal Society of New Zealand 2006
PDF file of entire paper: Print-quality (516K) | screen-quality (556K)
This year's abstracts |
Journal home page |
All abstracts |
Publishing home page
