Respiration rate and quality of spinach [Spinacia oleracea] cultivated in night-cooling greenhouse in summer
2004
Hu, W. (Kyushu Univ., Fukuoka (Japan). Faculty of Agriculture) | Tanaka, S. | Genkawa, T. | Hori, Y.
Respiration rate of spinach (Spinacia oleracea L.) cultivated in night-cooling greenhouse were measured and the changes in quality attributes were also determined during growth of spinach in summer. The result showed that there was lower level of respiration rate in night-cooling greenhouse than that in control, indicating that respiration rate was suppressed markedly in night-cooling greenhouse at night. The increase in the leaf length and area of spinach in night-cooling greenhouse was also much larger than that of control Significant differences in height and leaf area (Rho<0.0l) were found between spinach planted in night-cooling greenhouse and control. It was also shown that there were significant differences (Rho<O.05) in SPAD as a chlorophyll index and ascorbic acid content at harvest period. These results suggested that higher quality of spinach could be obtained from night-cooling greenhouse in summer.
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