ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effects of gibberellic acid (GA3) application and nitrogen fertilization on yield and quality of celery.

Paspatis, E. A.;

Annales de l'Institut Phytopathologique Benaki Year: 1995 Vol: 17 Issue: 2 Pages: 131-139 Ref: 14 ref.

1995

บทคัดย่อ

In glasshouse experiments, celery plants were fed with ammonium sulfate or ammonium nitrate (totalling 400 kg/ha in each case) or given no fertilizer. Plants were sprayed with 0, 25 or 50 ppm GA3. GA3 increased yield by up to 97% but only in plants given fertilizer. Increases were greater with 25 ppm GA3 than with 50 ppm. The same overall trend was obtained in comparable field experiments with yield increases up to 33% compared with untreated controls. In the field experiments, applying 75 ppm GA3 caused a decrease in dry weight of up to 23.2% relative to untreated controls, resulting in the production of more succulent plants and therefore greater vulnerability to postharvest decay. GA3 application also caused an increase in plant nitrate content, especially when ammonium nitrate was applied. In glasshouse experiments this increase was up to 200% at 50 ppm GA3; in the field experiment, it was up to 60%.