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Effect of Potassium and Earthing Up on Growth, Yield and Economic Benefit of Carrot

Sharmin Sultana Rima
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Tahmina Mostarin
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Khaleda Khatun
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Md. Ehsanul Haq
Department of Plant Science, University of Manitoba, Manitoba,Canada.

Md. Abdus Samad
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Mousumi Akter
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Abdullah Salfe Al Shamim
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Kanij Fatima
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.

Abstract/ Executive Summary:

The experiment was conducted in the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh. The experiment consisted of two factors. Factor A: Different levels of potassium as K₀= Control, K₁= 100 kg K/ha, K₂= 120 kg K/ha, K₃= 140 kg K/ha, and Factor B: E₀= no earthing up, E₁= two times earthing up, E₂= three times earthing up. The experiment was laid out in a Randomized Complete Block Design with three replications. The collected data were statistically analyzed. Results revealed that in terms of potassium application, the highest gross yield of roots/ha (38.35 t) and marketable yield of roots/ha (35.32 t) were recorded from the application of K₂ (120 kg K/ha) treatment compared to K₀ (control) treatment. Again, in terms of different earthing-up treatments, the highest gross yield of roots/ha (35.71 t) and marketable yield of roots/ha (34.75 t) were found from the treatment E₂ (three times earthing up) compared to E₀ (no earthing up) treatment. Both potassium and earthing up and their combination showed a significant variation on different parameters of carrot. The highest gross yield of roots/ha (43.51 t) and marketable yield of roots/ha (42.29 t) were found from the treatment combination of K₂E₂ (120 kg K/ha + three times earthing up) compared to K₀E₀ (control) treatment combination. The highest gross return (Tk. 8,45,800), net return (Tk. 6,52,102), and BCR (4.37) were obtained from the treatment combination K₂E₂ (120 kg K/ha + three times earthing up) where the lowest gross return (Tk. 4,00,600), net return (Tk. 2,43,718) and BCR (2.55) were obtained from K₀E₀ (control) treatment combination. So, It can be concluded that 120 kg K/ha with three times earthing up was the best for carrot growth, yield, and economic benefit.

Keywords: Benefit cost ratio; Carrot, Quality; Vegetable, Yield.

Location: Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh.

Start Date: 00-11-2018

End Date: 00-02-2019

Program Area: Crop-Soil-Water Management

Commodity: Carrot, Potash

Objectives:

To find out the suitable levels, an optimum number of earthing up and suitable combination of potassium and the number of earthing up for maximum growth, yield and economic benefit of carrot in Bangladesh.

Methodology:

The research was conducted during the period from November 2018 to February 2019 at the Horticultural Farm of Sher-e-Bangla Agricultural University (SAU), Sher-e-Bangla Nagar, Dhaka- 1207, Bangladesh. The experiment was carried out during rabi season. The location of the experimental site is situated at 90°22' E longitude and 23°41' N latitude. The altitude of 8.6 meters above sea level. The soil was having a texture of sandy loam with pH and organic matter 5.47-5.63 and 0.83%, respectively. The experiment consisted of two factors. Factor A: Four levels of potassium, viz. K₀: control, K₁: 100 kg K/ha, K₂: 120 kg K/ha, and K₃: 140 kg K/ha; Factor B: Different numbers of earthing up, viz. E₀ = Control, E₁ = Two times earthing up and E₂ = Three times earthing up. The two factors experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The whole experimental area was 18.5 m x 5.75 m which was divided into three blocks. Each block was again divided into 12 plots and hence there were 36 (12 x 3) unit plots. The treatments were assigned randomly in each block separately. The size of the unit plot was 1.25 m x 1.0 m. The distance between two adjacent blocks and plots was 50cm. In the experimental plots total amount of cow dung (1% potash) (10 ton /ha) and TSP (200 kg/ha), gypsum (100 kg/ha), and half of the MoP (as per treatment) were used as basal dose and rest of MoP (as per treatment) was used after 35 DAS. Urea (250 kg/ha) was used to equal three splits according to the experimental design. The applied manures were mixed properly with the soil in the plot using a spade. Fertilizers were used from Sher-e-Bangla Agricultural University (SAU) authorize Farm. Earthing Up was done according to the treatment. The first earthing up was done 35DAS as per required treatment. The second earthing-up was done at 55 DAS at all the plots except the control plot. The third earthing up was done at 75DAS as per treatment to identify the effect of earthing upon growth, yield, and economic benefit of carrot. The cost of production was calculated to find out the most economic combination of different levels of potassium and the number of earthing up. All input cost like the cost for land lease and interests on running capital were computed in the calculation. The interests were calculated @ 13% at a simple rate. The market price of carrots was considered for estimating the return. Analyses were done according to the procedure. The benefit-cost ratio (BCR) was calculated as follows: BCR= Gross returns (Tk./ha) / Total cost of production × 100; The recorded data on different parameters were statistically analyzed using Statistic 10 software. The significance of the difference among the treatments means was estimated by the least significant difference test (LSD) at a 5% level of probability.

Source of Information: Asian Journal of Research in Botany - 5(3): 34-46, 2021;

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the above result it was concluded that the application of potassium significantly affected the production and the yield of carrots. Among the treatments, K₂(120 kg K/ha) was superior to others.Numbersofearthingupwasplayedanimportantroleonthegrowthandyieldofcarrot.Inrespectofall, three times each in gup showed better performance than others. The treatment combination of K₂E₂(120 kg K/ha and three-times earth in gup)provide maximum growth, yield, and economic benefit of carrot and therefore, were commend 120 kg K/ha with three-times earthing up for maximizing the carrot growth, yield, and economic benefit.

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