Management of nitrogen fertilization of fresh vegetable crops at field scale in Walloon Region of Belgium
- Abras, M. , Goffart, J. , Renard, S. & Destain, J. (2010). Management of nitrogen fertilization of fresh vegetable crops at field scale in Walloon Region of Belgium. Proceedings in: Proceedings of the 28th International Horticultural Congress ISHS, Lisbonne (Portugal), 22-27 augustus 2010, 247.
|Year of conference
|Management of nitrogen fertilization of fresh vegetable crops at field scale in Walloon Region of Belgium
|Proceedings of the 28th International Horticultural Congress ISHS
|22-27 augustus 2010
|Type of article
|avec comité d'acceptation
|nitrogen, vegetables, N-recommendation systems, N-needs, N uptake kinetics
|Vegetable crops frequently receive high inputs of organic or mineral N fertilizer leading to quality losses and water pollution. A good management of N fertilization of these crops can both ensure their financial success and appreciably reduce the cause of these problems. Increasing N rates trials have been conducted in loam soil aiming to improve N efficiency of four crops (carrot, escarole, Welsh onion and curled-leaved endive). A provisional balance sheet method at field scale (Azobil software) has been used to give N recommendations and the N-needs fixed a priori for the four crops have been refined: 220 kg Nha-1 for carrots, 110 kg Nha-1 for escarole and curled-leaved endive and 180 kg Nha-1 for Welsh onion. Considering these N-needs and the difficulty to assess the net mineralization, Azobil frequently gave N recommendations close to optimal N rates. The phase of intense N crop uptake was from 60 to 80, 35 to 40, 25 to 35 and 30 to 40 days after sowing or transplanting for carrot, Welsh onion, escarole and curled-leaved endive respectively. This information, combined with N status monitoring of plants could be used to develop new strategies based on split N applications.
|Abras, M., Goffart, J., Renard, S., Destain, J.