Studies on the Relationships between Climatic Elements and the Yield of Mango in Yuching Area

Abstract

Mango tends to produce embryo-aborted fruits when grown under unfavorable climatic conditions in Yuching area. This study was aimed to investigate the influence of climatic elements during the flowering period on the frequency of seedless fruits and yield performance of mango. Experiments were conducted in 1993 and 1994 at Yuching area with 8-year old 'Irwin' mango trees. The seed aborted fruit percentage was counted 60 days after flowering, and the total sugar content of mango pulp was determined by a refractometer at harvest. The climatic data were recorded from 10 days before to 30 days after flowering, and their relationship with seedless fruit formation and yield was analyzed. Early flowering in January and early February resulted in high rate of seed aborted fruits and yield reduction. The cummulative temperature showed a significant negative correlation with the seed aborted fruit percentage and total sugar content. The cummulative precipitation showed a significant positive correlation whit both yield and total sugar content. The cummulative temperature and precipitation during the period of 30 days after flowing was more influential than