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Optimization of Fertilizer Requirement for Broccoli Under Field Condition

S. MAHMUD
Research Officer, CARE, Chittagong

J. HAIDER
Professor
Deptt. of Soil Science, BSMRAU, Gazipur,

M. MONIRUZZAMAN
Senior Scientific Officer (Horticulture)
Raikhali, Chandraghona, Rangamati Hill District-4531

M. R. ISLAM
Scientific Officer (Soil Science)
RARS Rahmatpur, Barisal, Bangladesh.

Abstract/ Executive Summary:

Objective of this study was to optimize the fertilizer need for maximizing yield of broccoli under irrigated condition in Grey terrace soil of Joydebpur. The experiment was conducted at the research farm of Bangabandhu Sheikh mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during the period from 18 November 1995 to 13 February 1996 using broccoli var. Premium (hybrid). The experimental soil was a terrace soil which is equivalent to Ochrapt suborder of USDA soil taxonomy and belongs to locally termed Salna Series of Shallow Red-Brown Terrace Soil (Saheed, 1984). From this study it was foung that nitrogen, phosphorous, potassium, sulphur, and molybdenum application were more effective with compost which played a significant role in increasing the head yield of broccoli. Application of 100 kg N, 120 kg P2O5, 100 kg K2O, 20 kg S, 0.8 kg Mo, and 500 kg compost/ha might be sufficient for maximum yield of broccoli in Grey Terrace soil of Gazipur.

Keywords: Fertilizer, Maximizing yield, Broccoli, Irrigated condition, Grey terrace soil of Joydebpur.

Location: Bangabandhu Sheikh mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during the period from 18 November 1995 to 13 February 1996

Start Date: 18-11-1995

End Date: 13-02-1996

Program Area: Crop-Soil-Water Management

Commodity: Broccoli

Objectives:

To optimize the fertilizer need for maximizing yield of broccoli under irrigated condition in Grey terrace soil of Joydebpur.

Methodology:

The experiment was conducted at the research farm of Bangabandhu Sheikh mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during the period from 18 November 1995 to 13 February 1996 using broccoli var. Premium (hybrid). The experimental soil was a terrace soil which is equivalent to Ochrapt suborder of USDA soil taxonomy and belongs to locally termed Salna Series of Shallow Red-Brown Terrace Soil (Saheed, 1984). The soil had the following characteristics: pH 5.7, organic carbon 0.65%, total N 0.053% available P 9.70 ppm, exchangeable K 0.33 meq/100g soil, available S 33.10 ppm, available B 33.10 ppm, and available Mo 33.10 ppm. There were 16 treatment combinations consisting of three levels of nitrogen (0, 60, and 120 kg N /ha from urea), four levels of phosphorous (0, 60, 120, and 180 kg P2O5 ha from TSP), three levels of potassium (0, 50, and 100 kg K2O ha from MOP), two levels of sulphur (0 and 20 kg ha from gypsum), two levels of boron (0 and 1 kg/ha from solubar), four levels of molybdenum (0, 0.4, 0.8, and 1.2 kg/ha from sodium molybdate), two levels of cowdung (0 and 10 t/ha) and two levels of compost (0 and 0.5 t/ha). The entire amounts of cowdung, compost, phosphorous, sulphur, boron, and molybdenum were applied in rows at final land preparation. Urea and MOP were applied in two equal installments at 15 and 30 days after transplanting. The experiment was laid out in a randomized complete block design replicated three times. Seedlings of 25 days old were transplanted on 18 November 1995 at a spacing of 60 cm x 45 cm after seven days of fertilization. The crops were first harvested on 14 January 1996 and continued upto 26 January 1996. The unit plot size was 2.5 m x 2.0 m. Irrigation was done by boarder method. For proper seedling establishment, water was given for seven days after transplanting by water can. Other cultural practices were adopted as and when required. The data on plant height, number of leaves per plant, size of the biggest leaf were recorded from 10 plants of the plot and reported treatment wise. Eight harvestings of terminal head including secondary heads were taken and marketable head yield was recorded at each harvest per plot in grams and it was then converted into yield per hectare in tons. Data on head diameter and marketable head weight/plant (terminal head + lateral heads) were recorded from 10 plants per plant. The data were analyzed through MSTAT Programme and the treatment means were separated by DMRT at 5% level of probability.

Source of Information: Bangladesh J. Agril. Res. 32(3) : 487-491, September 2007 ISSN 0258 - 7122

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Funding Source:

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Total Budget (Tk.) :

Achievement/Findings:

It can be, therefore, inferred that nitrogen, phosphorous, potassium, sulphur, and molybdenum application were more effective with compost which played a significant role in increasing the head yield of broccoli. Application of 100 kg N, 120 kg P₂O₅, 100 kg K₂O, 20 kg S, 0.8 kg Mo, and 500 kg compost/ha might be sufficient for maximum yield of broccoli in Grey Terrace soil of Gazipur.

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