Article

Production of Bioorganic Liquid Fertilizer from Oil Cake and Banana Peels

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Abstract

Even though Agricultural sector is the largest contributor for Ethiopia's economic development, yet food insecurity and malnutrition continues to worsen especially in rural areas. In order to overcome such problems there is a need for a paradigm shift in the food production and consumption patterns. Bioorganic liquid fertilizer not only increases bioorganic fertility of crops (in comparison to the control and prototype fertilizer), but also accelerates their maturation and nutrient quality. Thus, the present study was aimed to produce bioorganic liquid fertilizer from oil cake and banana peels through aerobic fermentation in open containers. The result indicated that Phosphorus (P), Potassium (K), Calcium (Ca) and sodium (Na) were found to be significant between bioorganic liquid fertilizer and compost tea (used as a control) solutions. However, there were no significance differences with respect to Carbon(C), Nitrogen (N), and Magnesium (Mg) contents of the solutions. It was also indicated that percentage macronutrient compositions of bioorganic fertilizer solution was found to be greater than those of compost tea solution in all studied macronutrients. The performance of Ethiopian mustard irrigated with bioorganic fertilizer solution indicated that above ground biomass per plant was found to be significant with the highest mean weight being 126.28gm for pot irrigated with bioorganic liquid fertilizer.

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... In this experiment the organic liquid banana peel fertilizer, referred to in some papers as a "tea" or "compost", was produced via aerobic fermentation (Yusuf et al., 2020) by storing 142 kg of cut banana peels in a covered 220-liter plastic drum (Unnisa, 2015) filled with rainwater for 20-70 days at ambient temperature averaging 4.2°C. The peels were cut using standard scissors into small 5-7 cm pieces (Teshome, 2022). ...
... The liquid fertilizer recorded the highest average at 177 mg/kg followed by 165 for the control and 113 for the solid, which indicates that the distribution is not significant and we reject H3.4 in the present experiment. These results correspond with the experiment by Yusuf et al. (2020) which reported a 1.70% nutrient composition of P in their liquid banana peel fertilizer compared to the 0.21% of the control. Similar to N, as reported by Conradie (1981), P absorption peaks following budburst until véraison, and again five weeks after harvest, indicating that the second soil samples could have been higher if they were collected prior to budburst. ...
... Teshome (2022), Bedhasa (2020) and Yusuf (2020) evaluated the macro and micronutrient compositions of their banana peel fertilizers. The solid compost investigated by Teshome (2022) found 42 mg/kg of K, 18mg/kg of Fe, 5.6 mg/kg of Zn and 2.5 mg/kg of N in the 30 g treatment. ...
Thesis
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Liebig’s law of the minimum states that a plant’s growth is not influenced by the total nutrients available, but is limited by the scarcest. Finding the balance of available macro and micronutrients, even in the world’s most prestigious and fertile vineyards, is unlikely. The consequence of this reality is the application of commercial mineral fertilizers containing plant available nitrogen (N), potassium (K), and phosphorus(P), which over the long term, may result in decreased soil fertility, prevailing over any interim benefits. Ironically, a sustainable answer can be found in rubbish. Banana peels create 36 million tons of waste, which is typically disposed of in landfills, despite the evidence that it contains significant nutrients for soil fertility. The following study investigates the application of banana peel-based fertilizers as an organic and sustainable alternative to promote vine growth, nutrient availability (N, K, P, Fe, Zn) and soil humus content in a vineyard in the Kremstal wine region of Austria. The experiment consists of an untreated control and two fertilizer treatments applied as a solid and a liquid, both based on organic banana (Musa) peels. One kg of the solid treatment was applied on 1 March 2023 and 0.5 l of the liquid treatment was applied monthly, four times, from April to July. The experiment collected multiple parameters including trunk diameter, shoot length, vine height, leaf count, pruning weight, phenological development (BBCH), soil humus and nutrient availability. The experiment recorded an increase in the availability of K in the soil, measuring an average of 171 mg/kg for the solid treatment compared to 108 mg/kg for the control. No statistically significant changes were measured for plant growth in biomass, phenological development, humus, pH or other soil nutrients. This study demonstrates that solid banana peel fertilizer can be used as an organic vineyard soil adjuvant for improving K in V. vinifera soil nutrition.
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