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Effect of Potassium on Growth, Yield and Shelf Life of Broccoli (brassica Oleracia Var. Botrytis) Cultivars

J. Uddain
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka.

M.J. Rahman
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka.

M.G. Mostofa
Integrated Soybean Cultivation Project, Department of Agricultural Extension, Khamar Bari, Dhaka.

Abstract/ Executive Summary:

Two experiments (Field experiment and laboratory experiment) were conducted at Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka during the period from October 2005 to February 2006 to study the effect of potassium on growth and yield of broccoli. Four levels of potassium (K) fertilizers viz. K₀ = 0 kg K/ha, K₁ = 50 kg K/ha, K₂ =0 75 kg K/ha and K₃ = 100 kg K/ha were used in the experiment. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. The highest plant height (55.82cm), stem diameter (5.61 cm), number of leaves (13.64), leaf length (46.03cm) at 60 DAT, shoot length (40.14cm), root length (30. 94 cm), fresh shoot weight (794.4g), fresh root weight (84.42g), main curd weight (260.0g), curd diameter (17.52cm), number of secondary curd (4.0), weight of secondary curd (166.0g) and curd yield (14.19 t/ha) were recorded from K₃. The laboratory experiment was laid out in two factors Completely Randomized Design (CRD) with four levels of potassium fertilizers viz. K₀ = 0 kg K/ha, K₁ = 50 kg K/ha, K₂ = 75 kg K/ha and K₃ = 100 kg K/ and three storage conditions. The storage conditions were as follows: i. Stored in open condition at room temperature (24°C), ii. Stored in perforated polythene bags at room temperature (24°C) and iii. Stored in perforated polythene bags at 4°C in refrigerator. The maximum shelf life of broccoli in open at room temperature (2.55), polyethylene bag at room temperature (5.63) and polyethylene bag at refrigerator (16.64) were found in K_o.

Keywords: Potassium, Growth yield, Shelf life, Broccoli

Location: Horticulture Farm in Sher-e-Bangla Agricultural University, Dhaka-1207.

Start Date: 15-10-2005

End Date: 15-02-2006

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Broccoli

Objectives:

To evaluate growth, yield and shelf life performance of Broccoli cultivars under different levels of Potassium.

Methodology:

The field experiment was conducted at Horticulture Farm in Sher-e-Bangla Agricultural University, Dhaka-1207 during October 15, 2005 to February 15, 2006. The area had sub tropical climate characterized by high temperature (28°-32°C) accompanied by moderately high rainfall during Kharif (April-September) season and low temperature (15°-20°C) in the Rabi (October-March) season under AEZ-28. Soil pH 5.6 and have organic carbon 0.82 %. The hybrid variety 'Green Sprouting Broccoli' was selected for investigation Seeds of 'Green Sprouting Broccoli' were collected from seed trader. The experiment was laid-out in Randomize Complete Block Design (RCBD) with three replications. Four levels of potassium fertilizers viz, K₀ = 0 kg K/ha K₁ = 50 kg K/ha, K₂ = 75 kg K/ha and K₃ = 100 kg K/ha were used in the experiment. The seeds were sown on 28 October 2005 in the seedbed and completed germination within seven days. Healthy and 21 days old seedlings were transplanted into the experimental field on 27 November 2005. Each plot size was 4.5m x 1.2m and spacing of 60 cm x 50 cm was considered for the study. Irrigation and weeding was done at ten days interval. Randomly selected ten plants were harvested from each plot for data collection. Data were collected on plant height (cm), stem diameter (cm), number of leaves per plant, leaf length (cm), shoot length, root length, days required for curd initiation, curd diameter (ern), curd weight (g), number of secondary curds, secondary curd weight (g), yield per plant (g), yield ha^-1 (t), The laboratory experiment was laid out in two factors Complete Randomized Design (CRD) with four levels of potassium and three storage conditions. The storage conditions were as follows: i. Stored in open condition at room temperature (24°C), ii, Stored in perforated polythene bags at room temperature (24°C) and iii, Stored in perforated polythene bags at 4°C in refrigerator. The three mature broccoli curds were selected for each treatment. The changes of florets color (just started to yellowish) were recorded by eye estimation. The means were separated by DMRT at 5% level of significance

Source of Information: Journal of Horticultural Science & Ornamental Plants 2 (1): 01-07, 2010, ISSN 2079-2158

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Among the three storage condition it was found that the shelf life of broccoli increased in the polyethylene bag at refrigerator condition. This could be due the effect of low temperature in refrigerator. Low temperature minimizes the respiration of broccoli as well as polyethylene beg also minimize the respiration process.

Knowledge Management: Journal