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Nut Characteristics and Correlation Studies of Coconut

M. A. Hossain
Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Rahmatpur, Barisal.

M. S. Islam
Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Rahmatpur, Barisal.

Abstract/ Executive Summary:

Three coconut cultivars namely, Bangladeshi, Malaysian and Sri Lankan were studied at the Regional Agricultural Research Station, Rahmatpur, Barisal during 1993-94. Malaysian cultivar had the largest nut size with heaviest weight (2080.00g) having maximum husk (937.50g), shell (212.80g), water (190.75ml) and kernel (394.50g). Sri Lankan cultivar had the minimum nut size, least nut weight (1500.00g) with the minimum husk (550.25g), shell (193.22g) and water (107.05ml) content. Bangladeshi cultivar had the intermediate nut characteristics. The shape of all unhusked nut was ovoid and that of husked nut was globular. The highest amount of copra was found from Malaysian and Sri Lankan cultivars. The study indicated that the larger the nut size the higher the water and kernel contents.

Keywords: Nut characteristics, Water, Kernel content, Coconut

Location: Regional Agricultural Research Station, Rahmatpur, Barisal

Start Date: 00-00-1993

End Date: 00-00-1994

Program Area: Socio-economic and Policy

Commodity: Coconut

Objectives:

To provide information on nut characteristics and relationship of whole nut and other components of local and exotic cultivars of Bangladesh, Malaysian and Sri Lankan typica coconut cultivars.

Methodology:

The study was conducted at the Regional Agricultural Research Station, Rahmatpur, Barisal during 1993-94. Three coconut cultivars namely, Bangladeshi, Malaysian and Sri Lankan were selected for this study. All cultivars of coconut under study belonged to the typica group. Age of each coconut plant from where nuts were collected was about 20 years. Twenty fully mature nuts of each of the cultivar were selected at random taking four from each of the five randomly selected plants from large plantation. The nut was shelled manually. Length, breadth and circumference were recorded at unhusked and husked condition by measuring scale. Thickness of kernel, husk and shell were measured by a slide calipers with the least count of 0.01 mm. Volume of water was measured by a measuring cylinder. All weights were recorded by an electric balance. Volume and surface area of unhasked hasked coconut were calculated according to the solid geometric formula. Bulk density was determined by measuring the volume of the nuts and its components by a cylindrical drum of 0.5m diameter and 0.5m height ad weight and weighing them by an electrical balance. For copra making, the coconut was husked and splited into portion was kept inclined in the air for 4 hours. The kernel was sliced into about 10mm width and weighed. Then the sliced kernel was placed on the tray in the oven. For initial drying, a temperature of 60 for 48 hours and got the copra of about 3-6 per cent moisture content. Data were analyzed using the standard statistical procedure.

Source of Information: Bangladesh Hort., 22(1&2):53-59,1994; ISSN 0379-4288

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the results, it may be indicated that Malaysian coconut cultivar produced the heaviest nut attaining maximum size and recorded the highest water, kernel and copra content. Sri Lankan cultivar obtained the smallest size with the lowest water and kernel content. Bangladeshi coconut cultivar showed intermediate performance. The relationship among the different characters of nuts and its components also indicated that the higher is the nut weight the higher is the water and kernel content.

Knowledge Management: Journal