Effect of vermicompost on growth, quality and economic return of garlic (Allium sativum L.) at Haramaya District, Eastern Ethiopia

Abstract

Garlic (Allium sativum L.) is an important vegetable crop in Ethiopia. The yield of the crop is often constrained by low and unbalanced nutrient supply in the soil. This study was undertaken to assess effect of vermicompost (VC) on growth, quality and economic return of garlic variety Chelenko I during 2016 main rainy season in Haramaya University main campus, Ethiopia. The treatment consisted of four levels of vermicompost (0, 2.5, 5 and 7.5 tons ha-1) laid out in a randomized complete block design in three replication. Data were collected and analyzed on days to emergency, plant growth, quality, and economic return of garlic. Results revealed early emergency (8.07 days) with application of 7.5 tons ha-1 of vermicompost while late emergency (10.13 days) was at nil application of vermicompost. Significant (P<0.05) maximum leaf area (37.05 cm 2), leaf area index (1.36) and biomass (61.54 g) were recorded with application of 7.5 tons ha-1. Besides to this, maximum total dry matter (32.71%) and total soluble solid (12.72 Brix°) were also recorded at the rate of 7.5 tons ha-1. Due to application of 7.5 tons ha-1 fertilizer, the economic analysis showed the highest net benefit cost of 431,188 ETB ha-1 and marginal rate of return (168.87%) with incurred highest total variable cost of 79,350 ETB ha-1. Thus, it can be reasonably generalized that on short time basis, the application of high amounts of VC fertilizers can result in higher economic return than the low dose of VC fertilizer. Therefore, it can be concluded that, the maximum growth and quality and economic return of garlic was obtained with application of 7.5 tons of VC ha-1 fertilizer as it gave the highest net benefit cost. However, since the experiment was done only once and at one location, similar experiments should be carried out using additional higher rates of VC fertilizer over several seasons and locations to make a conclusive recommendation.

Garlic (Allium sativum L.) Cultivation Using Vermicompost-Amended Soil as an Aspect of Sustainable Plant Production

“…Significant differences between the SL control group and the combinations with vermicompost were shown regarding mean yield (with the highest difference of 140% for SL < V50; p < 0.05) (Table 2). Kenea and Gedamu [25], while investigating the effect of vermicompost made from Lantana camara and Partinium hystrophorous with the addition of manure on selected garlic traits, showed that at increased vermicompost share from 0 to 7.5 t ha −1 , the average fresh weight of garlic increased by 9.5% compared to the control, while a 3-fold increase in the vermicompost rate (from 2.5 to 7.5 t ha −1 ) resulted in a 20% increase in A. sativum yield. A similar trend was shown in the present study, finding that the average yield of A. sativum increased as the proportion of vermicompost in the growing medium increased (V10 < V25 < V50) (Table 2).…”

“…Kale et al [23] and Nethra et al [24] showed positive effects of vermicompost on ornamental plants (Callistephus chinensis) where vermicompost at a dose of 10t•ha −1 had a positive effect on plant height, number of leaves and flowers. Kenea and Gedamu [25] argue that using good quality vermicompost for fertiliser purposes is crucial to increase plant productivity while minimising negative environmental impacts.…”

Vermicompost Formulation Based on Soybean Husk and Cow Manure on Shallots

“…At the beginning of growth (10 dap), the applied vermicompost had no significant effect on all growth parameters. This condition is due to the slow release of vermicompost so that the availability of nutrient for plants lasts a long time [37]. The availability of nutrients in the soil is related to the vermicompost overhaul process that occurs.…”