EFFECTS OF PLANTING DISTANCE AND PEAT VOLUME ON STRAWBERRY PRODUCTION IN BAG AND BUCKET CULTURE
In Dutch strawberry culture, expanding the harvest period is of great importance. For an early as well as for a late crop in plastic tunnels and glasshouses, growing methods have been developed in which plants are no longer grown in the soil but in a substrate (mostly peat). More and more cold-stored waiting-bed plants are used that first give a late crop (in October-November) and, after a short period of dormancy, a second crop the next spring. With these rather expensive growing methods, it is very important to know the optimum plant density and the optimum amount of substrate per plant. Trials showed that with an early crop and a late crop with waiting-bed plants (cold stored) of the cultivar Elsanta, an increase of plant density above 6 plants/m2 leads to a decrease of production per plant with no further increase of production/m2. In the determination of the optimum plant density the planting system is also of importance. A better distribution of the plants over the available surface leads to a higher optimum plant density. Furthermore, in this growing system a minimum quantity of 2.5–3.1 of peat per plant proved to be necessary.
Dijkstra, J., Bruijn, J., Scholtens, A. and Wijsmuller, J. M. (1993). EFFECTS OF PLANTING DISTANCE AND PEAT VOLUME ON STRAWBERRY PRODUCTION IN BAG AND BUCKET CULTURE. Acta Hortic. 348, 180-187