Effect of Vermicompost and Earthing Up on the Growth and Yield of Onion

Abstract

A field research was conducted at the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka-1207 during the period from October 2017 to March 2018 to study the effect of vermicompost and earthing upon growth and yield of onion. The experiment consists of two factors. Factor-A Vermicompost V0 (control), V1 (6 t ha-1 vermicompost), V2 (10 t ha-1 vermicompost) and V3 (14 t ha-1 vermicompost) and Factor-B Earthing up E0 (control), E1 (Two times earthing up) and E2 (Three times earthing up). The experiment was laid out in RCBD (Randomized Complete Block Design) with three replications. The collected data were statistically analyzed. Results revealed that in terms of vermicompost application The highest fresh weight bulb-1 (40.07 g), yield plot-1 (527.89 g) and yield ha-1 (5.39 t) were found from the treatment V3 compared to V0 (control) treatment. Again, in terms of different earthing up treatments, the highest fresh weight bulb-1 (32.48 g), yield plot-1 (431.67 g) and yield ha-1 (4.41 t) were found from the treatment E2 (Three times earthing up) compared to E0 (control) treatment. Both vermicompost and earthing up and their combination showed a considerable variation on different growth and yield parameters of onion. The highest fresh weight bulb-1 (42.73 g), yield plot-1 (567.33 g) and yield ha-1 (5.79 t) were found from the treatment combination of V3E2 compared to control V0E0 (control) treatment combination. And it may be summarized that 14 t/ha vermicompost with three times earthing up performed the maximum yield compared to other treatments.

Combined use of compost, compost tea, and vermicompost tea improves soil properties, and growth, yield, and quality of (Allium cepa L.)

“…on the other hand, treated onions with CT+VCT increased total bulb yield ton/ha -1 by 50.28 and 52.16%, compared to control treatment, in both seasons respectively. These results are in harmony with findings by (Arguella et al, 2006;Coulibaly, 2020;Monira et al, 2019;Singh et al, 2013;El-Shatanofy, 2011;Yoldas et al, 2011;Soleymani and Shahrajabian, 2012;Indira and Singh, 2014;Thanunathan et al, 1997). The rise in average bulb weight and total bulb yield in response to a mixture of CT+ VCT with or without solid compost application might be attributed to the availability of optimal nutrients in manure, which could have resulted in a high leaf area index through better leaf development and photosynthesis.…”

“…Also, 50% CT+ 50% VCT was superior treatment for dry matter % and TSS %. The pervious findings were similar with the results obtained by (Arguella et al, 2006;Coulibaly, 2020;Abou-El-Hassan et al, 2018;Monira et al, 2019;Singh et al, 2013). The build-up of non-structural carbohydrates whose distribution patterns alter, favouring the metabolism of fructi precursors and accumulating as scorodite, increased the bulb dry weight.…”

“…Along from that, adding compost and compost tea to vermicompost tea helps to fix atmospheric nitrogen and excrete certain growth stimulants (Saharan and Nehra, 2011). Similar findings were found by (Reddy and Reddy 2005;Pant et al ,2011;Kaswan et al, 2013;Shedeed et al, 2014;Singh and Ram 2014;Singh et al, 2015;Monira et al, 2019). Across all organic fertilizer treatments, number of leaves per plant were increased significantly as compared with the control.…”

“…(Fritz, 2012;Atiyeh et al, 2002). Similar results were found by (Monira et al, 2019). They indicated that increasing the amount of vermicompost boosted the number of leaves per plant substantially.…”