11/14/2022 0 Comments Demisie model 2018Onion is valued for its distinct pungency or mild-flavoured form of essential ingredients of many dishes. It is a recently introduced crop to Ethiopia from Sudan and then distributed to different parts of the country and now became important vegetable crop for markets and in a daily life of people the country. It is originated in central Asia between Turkmenistan and Afghan where some of its relatives still grow as wild plants. ) is one of the most important vegetables which belong to the family Alliaceae. Thus, growers in the study area can be benefited from closer intra-row spacing, however, it is paramount important to test the feasibility of the other closest intra-row spacing e.g., 6 cm and 4 cm. Moreover, the closest intra-row spacing (7 cm) gave higher marketable and total bulb yield than the wider intra-row spacing. Onion plant grown at closer intra-row spacing (7 cm) showed very promising result for average bulb weight, marketable yield and total tuber yield. Nafis variety was superior in terms of leaf number per plant (13.9), bulb diameter (5.67 cm), average bulb weight (74.50 g), marketable yield (36.26 t ha -1) and total bulb yield (36.28 t ha -1). In general, leaf number per plant, leaf length, plant height and leaf diameter were higher at wider intra-row spacing (13 cm). The highest leaf number (13.9) obtained from variety Nafis with intra-row spacing of 13 cm. Leaf number per plant was significantly affected by interaction of variety and intra-row spacing. The results of the study showed that both variety and intra-row spacing had a significant effect (P˂0.05) on all parameters, except for the leaf diameter which was only affected by intra-row spacing. The experiment was designed in RCBD with three replications. Four onion varieties (Adama Red, Nafis, Melkam and Nasik Red) and three intra-row spacing (7,10 and 13 cm) with inter-row spacing of 20 cm. The study was conducted under irrigation during the year 2016/2017 at Jimma University College of Agriculture and Veterinary Medicine, on experimental site of horticultural crops. The present study therefore, has been designed to investigate the influence of variety, intra-row spacing and their possible interaction on growth and yield of onion. In appropriate use of plant spacing and lack of evaluation of improved varieties across agro ecologies are the predominant agronomic practices that reduce the productivity of onion.
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