College of Agriculture & Natural Resources

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College of Agriculture & Natural Resource

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Author: search.filters.author.MESFIN WONDIMU HABTESubject: search.filters.subject.varieties

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    EFFECT OF DIFFERENT TYPES OF FERTILIZERS ON YIELD AND YIELD COMPONENTS OF ONION (Allium cepa L.) VARIETIES IN ENEMORE WOREDA OF GURAGE ZONE, ETHIOPIA
    (wolkite university, 2022-06-03) MESFIN WONDIMU HABTE
    Onion is one of the most important vegetable crops produced as a condiment for home consumption and income sources in many parts of Ethiopia. However, the productivity of onion is low due to various limiting factors, among which low soil fertility and lack of improved site specific varieties are the major ones. Hence, this study was initiated to evaluate and determine the effects of different types of fertilizers on the yield and yield components of nationally released onion (Allium cepa L.)Varieties in Enemore Woreda (district) of Gurage zone. A combination of four fertilizer treatments and four varieties were used. These were: 200kg ha-1NP, 242kg ha-1NPS, 244kg ha-1NPSB and 257kg ha1NPSZn; and Bombay Red, Nafis, Red Creole and Nasik Red of onion verities. The experiment was laid out in Randomized Complete Block Design, under factorial arrangement and with three replications. There were a total of 16 treatment combinations and 48 experimental units. Data were collected on various parameters of growth, yield and yield components using standard procedures. The data were analyzed using a SAS software version 9.3. The analysis of variance revealed that the main effect of both the different types of fertilizers and onion varieties influenced plant height, date of maturity and bulb dry weight. However, the unmarketable bulb yield was highly significantly (p<0.001) affected only by varieties. There was also statistically highly significant (p<0.001) interaction effect on leaf length, leaf number, bulb diameter, average fresh weight, marketable bulb yield, and total bulb yield. Accordingly, the treatment combination of 244 kg ha-1 NPSB fertilizer and variety Red Creole recorded the highest plant height (68.25cm), bulb diameter (6.1cm), leaf length(59.9cm),leaf number (13.66), average bulb fresh weight (103.66g), marketable yield (31.64 t ha-1 ) and total bulb yield(32.25 t ha-1 ). On the other hand, correlation analysis showed that almost all the tested yield and yield component parameters were highly significantly and positively correlated with the marketable bulb yield of onion. Besides, as revealed by the partial budget analysis, plants supplied with 244 kg ha-1 NPSB and variety Red Creole recorded the highest net benefit if Birr 462412.00 with acceptable Marginal Rate of Return (MRR,3441.7%), which can be recommended for economical production of onion at Enomore Woreda. Nevertheless, since, the study was conducted only for a single season and one location, further research is recommended to be carried out at different seasons of the year and multiple potentially representative locations.