ISHS Acta Horticulturae 627: XXVI International Horticultural Congress: Toward Ecologically Sound Fertilization Strategies for Field Vegetable Production
A DEHYDRATED ORGANO-MINERAL FERTILIZER AS A NITROGEN SOURCE FOR BROCCOLI |
| Authors: | C. Bélec, L. Dextraze, N. Tremblay, J. Coulombe, P. Lamy, R. Chabot |
| Keywords: | Brassica oleracea var. italica, Nitracheck® reflectometer, nitrate, split application |
| Abstract:
Areas with intensive animal production can now take advantage of industrial process that treat the raw manure and turn it into dried granular fertilizer material suitable for transportation over long distances. The objective of this study was to evaluate the agronomic potential as a nitrogen source for broccoli of a granulated organo-mineral fertilizer. The experiment was conducted on two different sites in Quebec. Supplemental nitrogen requirements at 5 wk after planting (sidedress) were assessed with the help of a diagnostic test measuring nitrate in petiole extracts. The Agrior product in combination with inorganic fertilizer gave as good yields as those obtained with conventional inorganic fertilizer N management. Yields obtained with either 1 or 2 t ha-1 of the organo-mineral fertilizer were not different. The amount of N to applied at side dress was optimized using the analysis of nitrate in petiole extracts. Biological activity in the soil tended to increase with organo-mineral fertilizer rates. Evaluation of the over winter effect of the organo-mineral fertilizer has been done with the establishment in 2001 of a wheat crop on top of the former broccoli set-up. Wheat yields showed a significant overwinter positive effect of the organic material. | |
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