บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Influence of postharvest light level on leaf drop and leaf necrosis of Ficus benjamina 'Starlight'.

Mulderij, G. E.;

Acta Horticulturae Year: 1991 Issue: No. 298 Pages: 153-159 Ref: 7 ref.

1991

บทคัดย่อ

Influence of postharvest light level on leaf drop and leaf necrosis of Ficus benjamina 'Starlight'.

F. benjamina (cv. Starlight) plants were placed in simulated transport conditions of 17 deg C, 60-80% RH and total darkness for 7 or 14 days. Plants were not watered during this period. Plants were then transferred to simulated interior environments at 20 deg C, 60% RH and a light intensity of 1.5, 3.0, 4.5 or 6.0 W/m2 from cool white fluorescent lamps for 12 h/day. Plants were watered as necessary. Control plants were moved directly from the greenhouse to the interior environment. Leaf drop and leaf necrosis were measured at the time of removal from simulated transport and at weekly intervals for 10 weeks. Leaf drop and leaf necrosis were significantly higher in plants placed under the lowest light intensity than in plants placed under higher light intensities. Transport simulation increased leaf drop and leaf necrosis, with 14 days having more effect than 7 days. At the end of 10 weeks, 358 leaves/plant had dropped in plants under 1.5 W/m2 and subjected to 14 days, simulated transport, compared with 34 leaves/plant for control plants at 6.0 W/m2. The total number of leaves at the start of the experiment was approx. 748. The effect of transport on leaf drop disappeared after about 6 weeks in all plants except those placed under 1.5 W/m2.