ISHS Acta Horticulturae 76: Symposium on More Profitable Use of Energy in Protected Cultivation
THE ADVANTAGE OF THE NORTHERN LATITUDES FOR THE UTILIZATION OF WASTE HEAT FOR GREENHOUSES AND SOIL WARMING |
| Author: | D.H. Dinkel |
| Abstract:
The long days and cool air temperatures during the summer in northern latitudes gives an environment with great photosynthetic potential for certain crops. Very high yields of adapted crops demonstrate that the photosynthetic rate per unit of time is high compared to growth rates at more southern latitudes. This photosynthetic potential can be extended and improved through the heating of greenhouses and soils. Soil warming in the north allows the outdoor production of crops such as cucumbers, squash, pumpkins, muskmelon and peppers. Waste heat, especially in the form of heated water, can be used effectively to heat soils and greenhouses in the north because the soils seldom rise above 15° C at rooting depths during summer months. This use is best justified for the high value horticultural crops and in areas having high costs to import foods and plant products. | |
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