Effect of PGRs On Bearing And Keeping Quality of Mango (Mangifera indica L.) Cv Amrapali
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Date
2006
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Birsa Agricultural University, Ranchi
Abstract
Mango (Mangifera indica L.) is the national fruit of India and acknowledged as king of fruits. It belongs to family Anacardiaceous . It is tropical fruit but can successfully be grown in sub- tropical climate also. The agro- climatic condition of Jharkhand is very congenial for mango growing and the state has an enormous wealth of genotypes.
In recent years, Amrapali is gaining immense popularity due to its dwarf stature, regular and prolific bearing and its suitability for high density archaizing and also for kitchen garden. Besides all these qualities, flowering, fruiting and keeping quality of aAmrapali mango are not so good.Hence, an experiment was carried out to study the effect of various growth regulators to enhance flowering, fruit set, yield and improve the keeping quality of fruits.
The experiment was conducted at Horticulture garden of Department of Horticulture, Birsa Agricultural University, Ranchi on five years old plants of Amrapali mango with eighteen treatments including two controls replicated thrice in Randomized block Design.
The results showed the remarkable influence of different PGR on flowering fruiting and quality characters. NAA 20 ppm was the best treatment for improving almost all flowering and physic-chemical characteristics, whereas, fruiting characters and keeping quality characters were best with GA 100 ppm treatment in Amrapali mango. 2, 4-D 20ppm also exhibited good results in these regards. Earliness in panicle emergence, decrease in duration of flowering, earliness in opening of 1st and 50 per cent flowers, increase in percentage of flowering stone and peel weight and almost all physic cochemical parameters were enhanced by NAA 20 ppm.However, increase in fruit set, retention, size, yield of fruits were found more with the physiological loss in weight of fruits, spoilage loss percentage and thereby helped in increase the keeping quality of Amrapali mango. It was also observed that the fruits wrapped with newspaper produced minimum physiological loss in weight (PLW) and spoilage loss of fruits during storage at room temperature and ultimately it increased the keeping quality of fruits. On calculation of economics of experiment the average net profit during both the years was highest from the plant treated with NAA 20 ppm. The other effective treatment in this regard was 2, 4-D at 20ppm