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Yield of Garlic (allium Sativum L.) Under Different Levels of Zinc and Boron

M. R. Islam
Agronomy Division, Regional Agricultural Research Station Ishurdi, Pabna, Bangladesh

M. K. Uddin
Principle scientific officer
Spices Research Center, Bogra, Bangladesh

M. H. R. Sheikh
Principle scientific officer
Soil Science Division, Regional Agricultural Research Station Ishurdi, Pabna, Bangladesh

M. A. K. Mian
Senior scientific officer
Agronomy Division, Regional Agricultural Research Station Ishurdi, Pabna, Bangladesh

M. Z. Islam
Assistant director (establishment)
Bangladesh Agricultural Research Council (BARC), Farmgate, Dhaka-1215, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted at the Regional Agricultural Research Station, Ishurdi, Pabna in Bangladesh during 2008-2009 and 2009-2010 to find out the response of garlic to different levels of zinc and boron under zero tillage mulched cultivation along with a blanket dose of 155-35-125-20 kg N-P-K-S ha^-1 for higher bulb yield. Four levels of zinc (0, 1, 2 and 3 kg ha^-1) and four levels of boron (0, 1, 2 and 3 kg ha^-1) were assigned in a split plot design with three replications. The highest bulb yield of 6.84 t ha^-1 was obtained with the application of 2 kg Zn ha^-1. Among the boron levels application of 1 kg B ha^-1 gave the highest bulb yield of 6.95 t ha^-1. The interaction of zinc and boron also influenced the bulb yield of garlic. Application of 2 kg Zn with 1 kg B ha^-1 gave the highest bulb yield of 7.53 t ha^-1 with highest gross return (Tk.451800 ha^-1), gross margin (Tk.337412 ha^-1) and benefit cost ratio (3.95). Yield response to both zinc and boron was quadratic in nature, and indicated that maximum yield could be obtained by the estimated optimum doses of 2.11 kg Zn and 1.35 kg B ha^-1 along with the blanket dose of 155-35-125-20 kg N-P-K-S ha^-1 and further increase in Zn and B level over the optimum dose would reduce bulb yield.

Keywords: Garlic, Zinc, Boron, Zero tillage, Mulched cultivation

Location: Regional Agricultural Research Station, Ishurdi, Pabna

Start Date: 00-00-2008

End Date: 00-00-2010

Program Area: Crop-Soil-Water Management

Commodity: Garlic

Objectives:

To find out the response of garlic to different levels of zinc and boron under zero tillage mulched cultivation along with a blanket dose.

Methodology:

The experiment was conducted at the Regional Agricultural Research Station, BARI, Ishurdi, Pabna, Bangladesh during rabi season of 2008-2009 and 2009-2010. The soil was clay loam in texture having 7.16 P^H, 0.87% organic matter, 0.049% total nitrogen, 11µgml^-1 available phosphorus, 0.12 meq 100g^-1 soil available potassium, 13 µg ml^-1 sulphur, 0.19 µg ml^-1 boron and 1.8 µg ml^-1 zinc. Four levels of zinc viz.; 0, 1, 2 and 3 kg ha^-1 and four levels of boron viz.; 0, 1, 2 and 3 kg ha^-1 were assigned in a split plot design with three replications. The zinc was assigned to the main plot and boron level was allotted to the subplot. The unit plot size was 3m ×3m. The clove was planted in line by dibbling maintaining 15 cm ×10 cm plant spacing on the muddy soil just 2 to 3 days after harvesting T-aman rice. Then the muddy soil surface was covered with rice straw. Planting was done manually using one clove per hole. The local variety of garlic was used in the study. The crop was fertilized as per treatments with a blanket dose of 155-35-125-20 kg N-P-K-S ha^-1. Zinc sulphate (ZnSO₄) and boric acid were used as source of Zn and B fertilizer, respectively. One third nitrogen was applied as basal and two thirds were top dressed in two equal installments at 25 and 50 days after emergence. Other fertilizers were applied on the muddy soil as basal before planting and covering the soil surface by rice straw. One weeding was done 30 days after emergence. The crop was planted on 14 November 2008 and 17 November 2009 and harvested 7 April 2009 and 29 March 2010, respectively. Data on yield and yield components were recorded and analyzed statistically. Values were adjudged by LSD at 0.05 level of probability. The optimum level of nutrient elements was calculated from simple polynomial regression equation i.e., Y = a + bx – cx² . Here, Y = dependent variable (yield attributes), a = Intercept (constant), b and c are the regression coefficients and x = Independent variable (nutrient element). The optimum levels of nutrient element for maximum yield was NO = -b/2c. Prediction of bulb yield was also estimated against optimum nutrient levels through developed functional relationship.

Source of Information: SAARC JOURNAL OF AGRICULTURE Vol. 10, Issue 1, 2012, pp. 55-62,ISSN 1682-8348,SAARC Agricultural Information Centre.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the findings of this field experiment it can be concluded that Zn and B is an effective fertilizer to increase bulb yield of garlic. The optimum doses of Zn and B fertilizer were 2.11 and 1.35 kg ha^-1, respectively. Application of Zn above 2.11 kg and B 1.35 kg ha^-1 caused a reduction in all parameters of yield and bulb yield of garlic. So, garlic under zero tillage mulched condition can be grown with application of 2.11 kg Zn ha^-1 and 1.35 kg B ha^-1 along with a blanket dose of 155-35-125-20 kg N-P-K-S ha^-1 for higher economic return.

Knowledge Management: Journal