1. Improving green manure quality with phosphate rocks in Ontario Canada
- Author
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Arcand, M M, Lynch, D H, Voroney, R P, van Straaten, P, Atkinson, C, Ball, B, Davies, D H K, Rees, R, Russell, G, Stockdale, E A, Watson, C A, Walker, R, and Younie, D
- Subjects
Crop combinations and interactions ,Nutrient turnover ,Composting and manuring - 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.
- Published
- 2006