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Effect of Nitrogen Fretilizer to Increase the Yield of Carrot (daucus Carotal.)

A. F. M. Ziaul Haque
Livelihood Coordinator
Haor Infrastructure and Livelihood Improvement Project, Local Government Engineering Department, Kishorganj.

Mohammad Sayedul Haque
Upazila Project Coordinator
Haor Infrastructure and Livelihood Improvement Project, Local Government Engineering Department, Habiganj.

Najmun Naher
Assistant Professor
Department of Botany, National University, Gazipur, Bangladesh.

Abstract/ Executive Summary:

A study was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh to evaluate the effect of five levels of applied nitrogen on the growth and yield of carrot. The experiment was laid out in a Randomized Complete Block Design with three replications. The five doses of nitrogen were 0, 50, 100, 150, 200 kg ha^-1. Root yield increased progressively and significantly with the increased application of nitrogen. Application of nitrogen 150 kg ha^-1 increased the root diameter (5.14 cm), fresh weight (200.1 g) and yield (53.37 t ha^-1) and when the dose was increased upto 200 kg/ha it decreased the yield (50.17 t ha^-1), fresh weight (189.2 g ha^-1) and root diameter 5.01 cm). High dose of nitrogen also increased cracked and branched root which reduced the marketable yield.

Keywords: Nitrogen, Carrot, Growth, Yield, Increase.

Location: Horticulture farm of the Bangladesh Agricultural University, Mymensing

Start Date: 00-10-2005

End Date: 00-03-2006

Program Area: Crop-Soil-Water Management

Commodity: Carrot

Objectives:

To study the effect of different levels of nitrogen on growth and yield of carrot.

Methodology:

The experiment was conducted at the Horticulture farm of the Bangladesh Agricultural University, Mymensing during the period from October 2005 to March 2006. The soil of the experimental plot belongs to the Old Brahmaputra flood plain area. The texture of the soil was silt loam and pH of the soil was 6.8. The selected land was medium high. The single factor experiment was laid out in a Randomized Complete Block Design with three replications. The whole experimental area was 20.30 m × 8.85 m, which was divided into three blocks. Each block was again divided into 25 plots and hence there were (5×5) unit plots. The size of unit plot was 1.25 m × 10 m. The distance between the blocks was 0.60 m and between the plots was 0.40 m. The experiment consisted of five levels of nitrogen viz., N0 = 0 kg ^N h^a-1 (Control), N₁= 50 kg ^Nha^-1, N₂= 100 kg ^N ha^-1, N₃ = 150 kg ^N ha^-1 and N4 = 200 Kg ^N ha^-1. The treatments were assigned randomly in each block separately. Carrot seeds of the variety 'New Kuroda' were soaked into water for 12 hours and then wrapped with a piece of thin cloth prior to sowing. Then they were spread over polythene sheet for two hours to dry. The seeds were treated with Vitavex-200 @ 3 g/100 g seed. Seeds were used at a rate of 3 Kg ha^-1 as narrated by Rashid (1993), consequently 20 g of seeds were used for the experimental area. Seven, six and five shallow furrows were made for spacing of 25 cm × 15 cm with 1 cm depth in each plot for sowing seeds. Seeds were sown on 15 November, 2005. Well decomposed cow dung was applied to the plots at the rate of 10 t ha^-1 and incorporated to the soil during land preparation. TSP was applied at the rate of 125 kg ha^-1/ha as a basal dose to provide 60 kg ha-1. Total amount of TSP was applied to the plots during final land preparation. Nitrogen and potassium (K₂O) in the form of urea and MP, respectively as per treatment schedule were top-dressed at 30 days after sowing the seeds. The field was irrigated 3 times during the whole period of plant growth following flood method. Intercultural operations like thinning, weeding, irrigation, insects and pest management were done as and when necessary to facilitate optimum crop growth. Data on plant height, number of leaves per plant, length of root, diameter of root and yield contributing characters were recorded from ten selected plants. The recorded data on different parameters were statistically analyzed by Duncun’s Multiple Rang Test (DMRT). The treatments mean were separated by Least Significant Difference (LSD) at 1% and 5% level of significance for interpretation of the result.

Source of Information: National University Journal of Science Vol. 1, No. 2, 2014

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The overall results gathered from this study facilitated to draw the conclusion that nitrogen significantly influenced various growth components and increased the yield of carrot up to the level of nitrogen fertilizer 150 kg/ha beyond which the yield decreased considerably. So, use of nitrogen above 150 kg ha^-1 will not be justified. Further study may be conducted in different agro-ecological zones of Bangladesh under variable field conditions to confirm the result of the present experiment before recommending it to the grower.

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