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Improving green manure quality with phosphate rocks in Ontario
Canada
M. M. Arcand1, D. H. Lynch2, R. P. Voroney1 and P. van
Straaten1
Abstract
Phosphate rock (PR) was applied to one conventional and two organic
dairy fields and planted with buckwheat (Fagopyrum esculentum) as a
green manure crop. In total, five types of PR were applied at three
application rates in order to determine the yield, concentration of
P in the aboveground tissue and the P uptake of buckwheat.
It was found
that PR of relatively high carbonate substitution and small particle
diameter could increase buckwheat tissue concentrations to a quality
such that mineralization of the buckwheat mulch could occur. Buckwheat
mulch and residual PR increased soil P flux as determined by anion
exchange membranes in situ in the following spring. This provides
evidence that buckwheat of high P quality has the potential to supply
P to a
subsequent crop.
Source
Aspects of Applied Biology (2006) 79:283-287.
Author Locations & Affiliations
(1) University of Guelph, Guelph, ON, N1G 2W1, Canada
(2) Nova Scotia Agricultural College, Truro, NS,
B2N 5E3, Canada
en français
Posted March 2010