Department of Horticulture

URI for this collectionhttps://rps.wku.edu.et/handle/123456789/45807

Department of Horticulture

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    RESPONSE OF POTATO (Solanum tuberosum L.) VARIETIES TO BLENDED NPSB FERTILIZER ON GROWTH, YIELD AND QUALITY PARAMETERS AT GUMMER DISTRICT, SOUTHERN ETHIOPIA
    (WOLKITE UNIVERSITY, 2022-03) DAMTEW GIRMA LEGESE
    Potato is an important food security and cash crop in Southern Ethiopia including Gurage Zone. However, productivity of the crop in the zone is far below its potential due to an array of factors. For instance, inappropriate selection of varieties and lacking information regarding the actual rate of the newly recommended blended NPSB fertilizer in the potato producing areas including Gummer district. Cognizant of this, the present experiment was initiated and conducted in Gummer district under supplementary irrigation, during the 2021 Belg season, with the objective of assessing the response of different potato varieties to blended NPSB fertilizer rates. The experiment was laid out in Randomized Complete Block Design (RCBD) with factorial arrangement and having three replications. There were 12 treatment combinations, which comprised of three potato varieties (namely; Belete, Gudanie and a local check, Askot) and fourrates of blended NPSB fertilizer rates (0, 119,238 and 357 kg NPSB ha-1). The analysis of variance showed that the two main factors (blended NPSB fertilizer rates and potato varieties) had a statistically significant effect on all tested parameters except the effect of the blended NPSB fertilizer rates on days to 50% emergence. The interaction of the two factors had also showed a statistically significant effect on days to 90% maturity, plant height, main stem number per plant, total tuber number/hill, tuber yield per hill, large sized tuber yield, marketable and total tuber yields (t ha-1) and tuber dry matter content. Days to 90%maturity were delayed with increased rates of blended NPSB fertilizer for all tested varieties. The highest mean plant height (69.54cm) and number of main stems per hill (8.38) were obtained at 357 kg ha-1NPSB with Belete variety. The highest marketable tuber yield (34.40 t ha-1), total tuber yield (35.84 t ha-1) and tuber dry matter content of (26.75%) were obtained from Belete variety with the application of 238 kg ha-1 NPSB fertilizer. The results of the economic analysis indicated that the maximum net benefit (180660.7 Birr ha-1) with 3405.23% marginal rate of return was obtained from Belete variety with the application of238 kg NPSB ha-1Hence, the application of 238 kg ha-1 with Belete variety can be recommended or optimum potato production with the acceptable economic benefit in the study area and similar agro-ecology. However, since the result is only of one season and location, further research is recommended to be carried out across more seasons and locations.
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    RESPONSE OF GARLIC (Allium sativum L.) VARIETIES TO TYPES OF BLENDED FERTILIZERS IN MIHUR-AKLIL DISTRICT OF GURAGE ZONE, ETHIOPIA
    (WOLKITE UNIVERSITY, 2023-07) HABTEMARIAM FIKADU BEREKA
    Garlic (Allium sativum L.) is one of the major vegetable and cash crops cultivated throughout the world including Ethiopia. Garlic productivity in Ethiopia (9.18t ha-1) is very low compared to the world average (18.4t ha-1. Its production is constrained by several factors including lack of productive varieties, improved agronomic practices, diseases and insect pests. Among these, inappropriate type of fertilizer and lack of improved varieties are the major ones. Hence, this experiment was conducted in 2023 at Mihur-Aklil District of Gurage zone, Ethiopia with the objective of investigating the effect of blended fertilizer type on growth, yield and yield attributes of garlic varieties. The experiment was laid out in a randomized complete block design in three replications using 20 treatments formed from factorially combined five garlic varieties (Tsedey, Kuriftu, Chefe, Holeta and local) and four types of blended fertilizers (0, NPS, NPSB and NPSZn ). Data on different Phenological, growth, yield and yield related variables were collected and analyzed using SAS, version 9.3. The analysis of variance showed that most of the studied parameters were significantly affected by the interaction of the two factors. The highest total bulb yield (17.08t ha-1), marketable bulb yield (14.94 ha-1), bulb weight (37.27g), bulb diameter (24.27mm), plant height (77.8cm), leaf length (52.33) and leaf area (38.80cm2) was recorded from Tsedey variety at NPSB blended fertilizer type while the widest leaf width (1.04cm) was recorded from Tsedey variety treated with NPSZn blended fertilizer type and the highest clove weight (2.70g) was recorded from Kuriftu variety treated with NPSZn blended fertilizer type. The partial budget analysis result showed that the highest net benefit of 963881.281Eth-Birr ha-1was obtained from variety Tsedey and NPSB fertilizer. Thus, from the present study, the variety Tsedey and NPSB fertilizer are recommended for economic production in the study area and areas with similar agro-ecological settings. However, since the study was carried out only for one cropping season and in single location, it is as well recommended that to be repeated across seasons and locations.