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Performance of Garlic Bulb Production Under Zero Tillage Mulched Condition as Affected by Time of Weeding

M.R. Islam
Scientific officer
Regional Agricultural Research Station Ishurdi, Pabna, Bangladesh

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

M.O. Kaisar
Senior scientific officer
Regional Agricultural Research Station Ishurdi, Pabna, Bangladesh

K.U. Ahamed
Scientific officer
Regional Agricultural Research Station Ishurdi, Pabna, Bangladesh

M.A. Alam
Scientific officer
Regional Agricultural Research Station Ishurdi, Pabna, Bangladesh

Abstract/ Executive Summary:

An investigation was conducted at the Regional Agricultural Research Station, Ishurdi, Pabna during 2008-2009 and 2009-2010 to find out the suitable time of weeding for higher yield of garlic under zero tillage mulched condition. Five treatments viz., No weeding = T1, Weeding at 25 and 45 DAE = T2, Weeding at 45 and 65 DAE = T3, Weeding at 25, 45 and 65 DAE = T4 and Weed free = T5 were included in a RCB design with three replication. In both the year weed free treatment gave the highest bulb yield (8.46 t/ha in 2008 and 8.92 t/ha in 2009). Weeding at 25, 45 and 65 DAE was suitable for better yield of garlic in respect of gross margin (358823 Tk./ha) and benefit cost ratio (3.98). The maximum yield reduction was noticed in no weeding (70.22-72.20%) over weed free treatment. Ipomea sp, xanthium indicum and cyperus rotundus were found the most dominant species of weeds in the garlic field in both the years. Yield of garlic was negatively correlated with weed infestation (r= -0.94).

Keywords: Garlic, Zero tillage, Mulching, Weed infestation

Location: Regional Agricultural Research Station, Ishurdi, Pabna

Start Date: 00-00-2009

End Date: 00-00-2010

Program Area: Crop-Soil-Water Management

Commodity: Garlic, Zero tillage, Weed management

Objectives:

Weed control in suitable time enhance vegetative growth and development of the garlic plants which contributes to better yield. Hence, it is needed to know the proper time of weeding for better growth and yield of garlic under zero tillage mulched condition. Therefore, the present study was undertaken to find out the suitable time of weeding for higher yield of garlic under zero tillage mulched condition.

Methodology:

The experiment was conducted at the Regional Agricultural Research Station, Ishurdi, Pabna, during 2008-2009 and 2009-2010. The experiment was laid out in randomized complete block design with 3 replications. The treatments were No weeding = T1, Weeding at 25 and 45 DAE = T2, Weeding at 45 and 65 DAE = T3, Weeding at 25, 45 and 65 DAE = T4 and Weed free = T5. The unit plot size was 4m ? 5m. Local garlic variety was used as the test crop. The crop was planted in line, maintaining 15 cm x 10 cm spacing on the muddy soil just 2 to 3 days after harvesting T-aman rice. Then the muddy soil surface was covered by rice straw. Planting was done manually using one clove per hole. The crop was planted on 10 November in 2008 and 14 November in 2009 and harvested on 2 April in 2009 and 10 April in 2010. The crop was fertilized with 155-35-125-20 kg N-P-K-S /ha. One third nitrogen was applied as basal and two third was top dressed in two equal installments at 25 and 50 days after planting. Other fertilizers were applied on the muddy soil as basal before planting and covering the soil surface by rice straw. Weeding was done as per treatment. Weed infestation per square meter, kinds of weed species, dry weight of weed were recorded from each of the treatments. Data on yield and yield components were recorded and analyzed statistically. Values were adjusted by LSD at 0.05 level of probability. Weed parameters like weed density, absolute density, relative density and intensity of weed infestation were computed from the above data using the following formula (Bhandari, 1981).

Weed density (D): It indicates the total number of individuals for all weed species per unit area (m²) Absolute Density (AD): It denotes the total number of individuals of a given weed species per unit area (m²)

Relative density (RD) = Absolute density of a given species / Total absolute density for all species x 100

The intensity of weed Infestation (IWI) of a weed Species = Absolute density of a given weed species / Absolute density of crop plants

The intensity of weed Infestation (IWI) of total weeds Species = Weed density per squire meter / Density of crop plants per squire meter

Source of Information: J. Sci. Technol. (Dinajpur) Vol. 8: 164-170 (2010) ISSN 1994-0386

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From two years results, it may be concluded that for higher bulb yield, minimum weed infestation and maximum profit (in respect of gross margin and benefit cost ratio), weeding at 25, 45 and 65 DAE should be adopted under zero tillage mulched condition.

Knowledge Management: Journal