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Effect of Fertilizer Doses on Growth and Yield of Cabbage in Haor Areas

M Salwa*
Research Associate, Department of Soil Science, Sylhet Agricultural University, Sylhet-3100, Bangladesh

MA Kashem
Department of Soil Science, Sylhet Agricultural University, Sylhet-3100, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted in the Dekar haorarea under Sunamganj district during the period from November 2017 to February 2018 to evaluate the influence of fertilizer doses on the growth and yield of cabbage (Brassica oleracea). Four fertilizers doses viz. Recommended dose of N-P-K-S-Zn-B @ 240-88-100-32-4.5-1.5 kg ha^-1 (F1), F1+ 25% of F1(F2), F1-25% of F1 (F3), and Cowdung @ 10 t ha^-¹ (F4) were used in the experiment following randomized complete block design (RCBD) with three replications. Data on growth, yield and yield contributing parameters were recorded. Application of fertilizer doses resulted in variations of growth characteristics of cabbage. The tallest plants were observed due to application of 25% higher fertilizer over recommended dose (F2). The longest leaves 14.33 cm and 28.54 cm were recorded in 25% higher fertilizer over recommended rate at 15 and 45 DAT. Peak spreading area 69.47 cm was in 25% less than recommended fertilizer rate (F3) at 60 DAT. The largest head diameter 69.13 cm was observed due to application of recommended fertilizer dose and the lowest 53.07 cm was in cowdung application @ 10 t ha^-1. The maximum gross yield (113.13 t ha^-1) and the head yield (79.43 t ha^-1) were obtained with the application of recommended dose of fertilizers (F1). The highest BCR 4.5 was observed in recommended fertilizer dose. The results revealed that national recommendation and 25% more than national recommended dose both produced promising cabbage yield in haor area.

Keywords: Recommended dose, Cowdung, Gross yield, Head yield, BCR, National recommendation

Location: Dekar haorarea under Sunamganj district

Start Date: 00-11-2017

End Date: 00-02-2018

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Cabbage

Objectives:

The experiment was conducted to observe growth, yield and profitability of cabbage with different fertilizer doses in haor area.

Methodology:

The experiment was conducted in the Dekar haorareas of South Sunamganj upazila under Sunamganj district, during the period from October 2017 to February 2018. The soil of the experimental area was silt-loam in texture having pH 4.9-5.2. The experimental fields were medium high land with well drained condition. Seeds of hybrid cabbage variety, Atlas 70 (a Japanese Hybrid) was collected from local market of Sylhet and used as a test crop. The experiment was designed using randomized complete block design (RCBD) with three farmers’ fields and treated as replications. The unit plot size was 5 m × 4 m and planted in 50 cm × 50 cm spacing. Fertilizer treatments were assigned in the plots according to the treatments viz. F1 = Recommended rate (240:88:100:32:4.5:1.5 kg ha-1of N-P-K-S-Zn-B) of fertilizer, F2 = 25% more than recommended rate 240:88:100:32:4.5:1.5 kg ha^-1 of N-P-K-S-Zn-B) of fertilizer, F3= 25% less than recommended rate of fertilizer (240:88:100:32:4.5:1.5 kg ha-1of N-P-K-S-Zn-B) and F4= Cowdung @ 10 t ha^-1. Decomposed cowdung was applied before 10 days of final land preparation. The whole amount of P, S, Zn and B were applied as basal during the final land preparation. Urea was applied in two equal splits at 15 and 35 DAT as ring method under moist soil condition and mixed thoroughly with the soil for better utilization. Thirty day-old seedlings were transplanted on 11 November 2017 in the field in the afternoon. After transplanting, seedlings were irrigated immediately and shading was done using banana sheath to protect scorching sunlight. The crop was under regular irrigation (1 irrigation day^-1) for 7 days up to establishment. Five irrigation were done at 5-7 days interval during crop growth. Gap filling of cabbage plants was done after few days where necessary. Three weeding and earthing up were done at 20, 40 and 60 DAT. Two times of insecticide, Malathion 57 EC @ 2ml L^-1 water, applied at 30 DAT and before head initiation. The data pertaining to growth viz. plant height (cm), number of loose leaves plant^-1, leaf length (cm), leaf breadth (cm) and spreading area (cm) were taken at 15 days interval. Data on yield viz. head diameter (cm), gross yield (t ha^-¹) and head yield (t ha^-1) were recorded after harvesting of cabbage. Cabbage harvesting was started from 26 January to 13 February and yield (t ha^-1) data were recorded. Data were collected from three farms and average was made. The data recorded for growth and yield parameters were statistically analyzed using R computer program.

Source of Information: J. Sylhet Agril. Univ. 5(1):45 -49, 2018 ISSN: 2308-1597

Article Link (Online Journal): www.jsau.com.bd

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

At the conclusion it could be said that after recession of floodwater in the haor area, cabbage seedlings can be transplanted in the main field of kanda land. Haor area needs late variety of cabbage with recommended rate of fertilizer dose. Minimum production cost with recommended fertilizer dose was found to be more profitable for the haor areas.

Knowledge Management: Journal