ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Litchi flower manipulation by girdling.

Morse, R. L.; Oosthuizen, J. H.;

Yearbook - South African Litchi Growers' Association Year: 1993 Vol: 5 Pages: 10-11 Ref: 1 ref.

1993

บทคัดย่อ

Since they require a period of vegetative dormancy in the terminal shoots to initiate flowering, litchi trees will only flower well in areas with a cool, dry autumn-winter period every year. The trees tend to flush more than once after harvest, during periods of warm and sometimes wet weather in winter. This phenomenon reduces the formation of panicles and flowers. In 3 experiments it was shown that the lack of winter stress could be overcome by using a girdling technique. A 3-mm-wide strip of bark was removed around the main frame branches, down to the xylem. Translocation of sugars and growth inhibitors between the leaves and roots was thus prevented and the build-up in the leaves promoted flower development. Growers wishing to experiment with girdling are advised that it is very important that only very healthy, vigorous trees with a strong postharvest flush are girdled; repeated annual girdling is now being investigated and cannot be recommended unless trees are very vigorous and proper fert ilization and irrigation are necessary when trees are girdled, especially after they have produced a heavy crop.