ISHS Acta Horticulturae 578: International Symposium on Design and Environmental Control of Tropical and Subtropical Greenhouses
VEGETABLE GROWTH PERFORMANCE IN SEMITROPICAL AIR INFLATED GREENHOUSE |
| Authors: | T.-C. Kao, C.-H. Wu |
| Keywords: | Vegetable, growth, semitropical, air inflated, greenhouse |
| Abstract:
In order to evaluate the efficiency of air inflated double-layer greenhouse in central Taiwan, a two-year experiment was conducted at Taichung District Agricultural Improvement Station, Changhua, Taiwan, ROC in 1990-1991 crop years. Two film plastic houses with double glazings having similar size, orientation, and equipment of pad and fan cooing system were built. A dynamic root floating hydroponic system was set up in each greenhouse. The annual growth performance of cucumber, mask melon and crisp lettuce were measured. A screening net with 35% shading rate was spread over the dome of one of the greenhouse to compare the difference on cooling effects of the engineering system. The micro-climatic data such as temperature, relative humidity, PAR and total solar radiation were measured to analyze its correlation with crop yield response. Results indicated that the relative humidity was the limiting factor related to the occurrence of tip burn and bolting symptom of the summer grown crisp lettuce, and the performance of powdery mildew disease happened to mask melon and cucumber in the winter. The yield and quality of the crops were significantly related to the performance of those disease and physiological disorder. | |
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