DIOSCOREA DUMETORUM PDF

Fulltext – Functional Properties of Bitter Yam (Dioscorea dumetorum) as Influenced by Soaking Prior to Oven-drying. The plant is often purposely grown at spare points on the land as an insurance against famine years, and is also encouraged in hedgerows around a farm and. Notes. BRIEF DESCRIPTION A climbing vine with robust, spiny stems reaching up to m in length. The leaves are trifoliate with ovate leaflets, cm long.

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These yields are gross, and because a substantial quantity is used for propagation, net yields are generally about 2. Tubers are produced underground and tuberous bulbils in leaf axils and on terminal racemes. Longmans, Green and Co. They are dumetorim deeply to avoid drying out of dipscorea young shoots and for this reason the head rioscorea the sett is also placed downwards. Field spacing-recommended spacings vary, though 90 x 90 cm appears to be the most common for mounds, and from 90 to cm in ridges I m apart: Bulbils are sometimes used, but these may take 3 years to produce an economic yield of tubers.

These vary in number from 5 to 50 per plant and are commonly spherical to club-shaped but differ consider ably in form and are usually cm long. This is an indication that soaking in water modified the content value of these properties of the bitter yam flour irrespective of the soaking time.

The petioles are thickened at the base with 4 sharp prickles. Harvesting and handling The tubers are usually lifted by hand with a digging stick or fork. A mosaic disease of the yam Dioscorea rotundata in Puerto Rico. Archivos Venezolanos de Nutrici2 1 It is subtropical and can tolerate much colder conditions, including frost, than most yam species.

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The study provides insight on the possible application of soaking in clean water to optimize the studied functional compositions of bitter yam flour.

Field Crop Abstracts, 25, Generally, the swelling index indicates the degree of exposure of the internal structure of starch present in food to the action of water. Minor cultivated Dioscorea species. The flesh may be white, pale-yellow, or dark-yellow, the last being bitter. The economics of yam cultivation in Cameroon.

World Anthropology Harlan, J. The production of yams in Barbados. The flowers are cinnamon-scented, sessile in simple raceme-like spikes from the axils.

Dioscorea dumetorum – Wikipedia

Results showed peak effect in the sample soaked in water for 24 h which increased respectively to 0. The wealth of India: If the yams are not staked, complete ground cover is attained months from sprouting and weeds are virtually eliminated.

Indian Forester, 79, It usually grows at relatively low elevations, less than m, though it has been reported growing at altitudes up to 1 m in the Himalayas. Some varieties have purplish leaf veins and stems. Means of triplicate data were recorded. Field spacing-information is scant. Ignames sauvages et cultiv du Cameroun.

The tubers are clustered at the base of the plant as the terminal enlargement of usually short stolons. Higher moisture contents occur in immature tubers.

Where the rainy season is less than 8 months it has been found that early planting, up to 3 months before the rains, can give a dioecorea per cent increase in yield.

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Potentials of Trifoliate Yam (Dioscorea dumetorum) in Noodles Production

Journal of Agriculture of the University of Puerto Rico, 50, In recent years there have dumegorum attempts at more sophisticated processing for export, eg fufu from Nigeria, canned yams and yam soup from Puerto Rico, and yam flakes from Barbados. African bitter or cluster yam. Growth period In Fiji the crop is reported to mature in months, in Malaysia months and in the West Indies 10 months. Experimental Agriculture, 8, Anti-oxidant potential, microbial and shelf-life characteristics of these noodles are recommended for further studies.

The result from this study may provide basis for further studies aimed at improving the physico chemical properties and possibly the taste as well as the keeping quality of bitter yam flour.

According to Alozie dioscirea al. Field spacing-when grown under monoculture, plantings on ridges 1. Recent developments in the Caribbean have led to the production of a mechanical harvester and a reduction in damaged tubers to about 8 per cent. Yield Under optimal conditions yams are among the most efficient producers of human food: Tropical Agriculture, Trinidad, 33, Comparative quality assessment of flour from sun-dried and heated air-dried green banana Musa sapientum and plantain Musa paradisiacal.

Dry periods of more than about 2 months can lead to death of the plant.

Botany Dioscorea is a large genus of over species with subterranean tubers or rhizomes. Day-length – a day-length of less than dioscogea hours is required for tuberisation.