Department of Agribusiness and Value Chain Management

URI for this collectionhttps://rps.wku.edu.et/handle/123456789/45804

Department of Agribusiness and Value Chain Management

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    EFFECT OF BLENDED NPSB FERTILIZER RATES ON YIELD AND YIELD COMPONENTS OF MUNG BEAN VARIETIES IN CHEHA DISTRICT, GURAGE ZONE, CENTRAL ETHIOPIA
    (WOLKITE UNIVERSITY, 2024-06) TIGIST FENTAHUN MEHARIE
    Mung bean (Vigna radiata L.), is a recently introduced grain legume crop with high potential uses and export demand. However poor crop management practices, including improper NPSB fertilization rate and absence of improved varieties contributed to low productivity in the study area. Hence a field experiment was conducted in Cheha district, Gurage Zone to evaluate the effect of blended NPSB fertilizer rates on the yield and yield components of mung bean varieties. The experiment was laid out in a randomized complete block design with three replications. There were 16 treatment combinations, comprising two mung bean varieties (NVL-1 and Rasa) and eight blended NPSB fertilizer rates (0, 25, 50, 75,100, 125, 150 and 175 kg ha-1). The results showed that the highest values for most growth parameters and yield components were obtained with the application of 175 kg ha-1 NPSB. Results from the main effect of NPSB fertilizer rates indicated that the highest values for plant height (75.83), total number of branches (8.43), total number of nodules (22.91 and 22.6), number of effective nodules (13.41and 13.01) hundred seed weight (35.5g) and above ground dry biomass (5606.3 kg ha-1) were obtained. The interaction between variety and NPSB rate significantly influenced several growth and yield traits. The combination of Rasa variety with 175 kg ha-1 NPSB resulted in the highest days to 50% flowering (55.66 days),days to 90%physiological maturity (88.33 days), number of pod per plant (31), number of seed per pod(13.91), grain yield (1403.33 kg ha-1) and harvest index (24.97%).The partial budget analysis indicated that the combination of rasa variety with 175 kg ha1 NPSB gave the highest net benefit (48,928 Birr ha-1) with 1113.2% marginal rate of return. Therefore, the use of 175 kg ha-1 NPSB fertilizer with Rasa variety are recommended for optimal mung bean yield and economic benefit in the study area and similar agro ecology. These findings provide valuable insights for farmers and researchers to enhance mung bean production and address yield limitations in Ethiopia. However, since the result is only on one season and one location, further research is recommended to be carried out across more seasons and locations.
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    EFFECT OF RHIZOBIUM INOCULATION (MB003) AND NPSB FERTI LIZER RATES ON GROWTH YIELD AND YIELD COMPONENTS OF MUNG BEAN (Vigna radiate (L.) WILCZEK) VARIETIES IN MISRAK MESKAN DISTRICT EASTERN GURAGE ZON
    (WOLKITE UNIVERSITY, 2024-05) MOHAMMED WULCHAFO BADKARO
    Lack of adequate information on the use of Rhizobium strain and nitrogen-phosphorus-sulfurboron(NPSB) fertilizer rates are the major yield limiting factors for producing mung bean in the study area. Thereforethe study was conducted with the objective of evaluating the nodulation, growth and yield responses oftwo varieties of mung bean (Vigna radiate (L.) Wilczek) at differ ent rates of NPSB fertilizer andRhizobiuminoculates. A field experiment was carried out during the main cropping season of 2021/22 at Misirak Meskan District in Farmers Training Center (FTC). The treatments combinations were two levels of Rhizobium inoculation (with and with out), twomung bean varieties N-26 (Rassa) and NVL-1(Nassa) and four levels of NPSB fertilizer (0, 50, 100, 150 kg ha-1). The experiment was arranged in a 2×2×4 factorial combination in randomized complete block design with three replications. Soil samples were collected from the experimental field at (0-30cm depth) before planting and after harvest to determine selected soil physicochemical properties. Data on growth, nodulation, yield and yield components were rec ordedand subjected to Analysis of Variance (ANOVA). Results on soil physicochemical proper ties analyzed before planting and after harvest showed significant differences due to the com bined effects of NPSB fertilizers and Rhizobium inoculation. Crop phenology (days to 50% flow ering and days to physiological maturity), growth (plant height, number of primary and second ary branches, shoot fresh and dry weight, root dry weight), and nodulation (number of nodules, nodule fresh and dry) weight of mung bean varieties were significantly affected by NPSB fertiliz er rates and Rhizobium inoculation. Moreover, theinteraction effects of NPSB fertilizer rates, Rhizobium inoculation and mung bean varieties showed significant effects on number of pods per plant, number of seeds per pod, a hundred seed weight, harvest index, grain yield and above ground biomass. The highest mean value of grain yield(2105.77 kg ha-1) was obtained from a combined effect of 150 kg NPSB ha-1and Rhizobium inoculation from variety N-26 which result ed in 61.28% followed by (2078.90 kg ha-1) which was increased by 62.07% at the rate of 100 kg NPSB ha-1increase over the control (1290.37 kg ha-1). Furthermore, the number of seeds per plant, a hundred seeds weight, above ground dry biomass and HI of mung bean were recorded the highest mean values (607.33), (7.50 g), (4241.67 kg ha-1) and 0.483, respectively at the rate of 150 kg NPSB ha-1fertilizer with a Rhizobium inoculation. The partial budget analysis re vealed that the maximum(ETB108600.6 ha-1) net benefit was obtained from combined applica tion of rhizobium inoculation and 100 kg NPSB ha-1from variety N-26 with MRR of 10130%And minimum (ETB 68572.8 ha-1) net benefit was obtained from the control. A net benefit ad vantage of 63.14% (ETB 68572.8 ha-1) when compared with the maximum and minimum net benefit. Hence, Rhizobium inoculation with application of 100 kg NPSB ha-1could be tentatively recommended for mung bean production in Misirak Meskan area. However, the experiment should be repeated over years and locations to provide valid recommendations appropriate for the study site.