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Effect of Plant Spacing and Nitrogen Levels on Nutritional Quality of Broccoli (brassica Oleracea L.)

M. S. RONI
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706,

M. ZAKARIA
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706,

M. M. HOSSAIN
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706,

M. N. SIDDIQUI
Department of Biochemistry and Molecular Biology, BSMRAU, Gazipur-1706, Bangladesh.

Abstract/ Executive Summary:

The study was carried out in the research field and laboratory of the Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 during October 2011 to April 2012 to determine optimum level of nitrogen and spacing for improving the nutritional quality of broccoli. There were 15 treatments in the experiment comprising five levels of N viz., 0, 80, 120,160, and 200 kg/ha and three plant spacings viz., 60cm x 60cm, 60cm × 45cm, and 60cm × 30cm. The results revealed that the highest ascorbic acid content (50.38 mg/100g) was obtained from S60X30N0 and the highest B-carotene content (50.67 IU/100g) was found in S_60X60N₀. Maximum Ca (0.556%) was found in S_60X60N₀ whereas maximum Fe (159.002 ppm) was in S_60X60N₂₀₀. The maximum P content (0.081%) was observed in S_60X60N₁₆₀ and maximum K content (0.854%) was found in S_60X45N₁₂₀_.

Keywords: Nitrogen, Plant spacing, B-carotene, Ascorbic acid, Broccoli

Location: BSMRAU, Gazipur

Start Date: 10-10-2011

End Date: 21-02-2012

Program Area: Crop-Soil-Water Management

Commodity: Broccoli

Objectives:

The present study aimed to investigate the optimum dose of nitrogen and spacing for increasing the nutritional quality of broccoli.

Methodology:

The experiment was conducted at the Horticultural Research Farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur during the period from 10 October 2011 to 21 February 2012 and the nutritive quality analysis was done in the laboratory of the Department of Horticulture, BSMRAU, Gazipur-1706, Bangladesh. The field experiment was laid out in Randomized Complete Block Design with three replications. The whole experimental area was divided into three blocks which represented three replications. The treatments were randomly allotted in each replication. Replication to replication and plot to plot distance were 0.75m and 0.5m, respectively. The size of each unit plot was 2.4m × 1.8m. Total number of plots was 45. For nutritive quality analysis of broccoli, the curds were placed in laboratory room. A drying oven (Sanyo, Japan) was used to dry the curd samples for mineral analysis and the laboratory part of the experiment was laid out in Complete Randomized Design with three replications The data of various parameters recorded in the experiment were compiled and statistically analyzed through partitioning the total variance with the help of computer MSTATC program. Analysis of variance was done according to Gomez and Gomez (1984). Means were separated using Duncan's Multiple Range Test (DMRT) at 1% or 5% level of probability.

Source of Information: ISSN 0258-7122 Bangladesh J. Agril. Res. 39(3):491-504, September 2014

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In case of plant spacings, a significant result was found in potassium content. The maximum potassium content (0.883%) was recorded from the widest spacing S₁(60 cm x 60 cm), which was followed by S₂ (0.831%) and minimum potassium content (0.823%) was recorded from the closest spacing S₃ (60 cm x 30 cm). The interaction effect of different levels of N fertilizers and plant spacing on potassium content was significant. The highest potassium content (0.850%) was recorded in T₈ (S_60X45N₁₂₀) and the lowest potassium content (0.816%) was found in T₆, T₉, T₁₁, and T₁₄. On the basis of the results of the present study, it can be concluded that the content of ascorbic acid, B-carotene, and calcium were maximum in broccoli produced in absence of inorganic nitrogen whereas iron, phosphorus, and potassium were maximum in broccoli produced with the highest dose of nitrogen (200 kg/ha).

Knowledge Management: Journal