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Effect of Rate of Arbuscular Mycorrhiza Inoculum on Tomato (solanum Lycopersicum) Seedlings

M. A. H. BHUIYAN1
1 Principal Scientific Officer, Soil Science Division, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

An experiment on the effect of rate of Arbuscular mycorrhiza (AM) inoculum on tomato seedlings was conducted at Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh for two consecutive years. Seven rates of AM inoculum viz., 0, 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 kg/m 2 were tested. Cowdung was used at a rate of 5 kg/m 2 . Seeds were sown in 10 cm apart lines on 13 November 2007 and 11 November 2008, and the seedlings were thinned out to about 3 cm from seedling to seedling within a week of germination. Roma VF was used as a variety of tomato. Biomass yield, root colonization, spore number, and nutrient uptake by tomato seedlings increased remarkably with the rates of AM inoculum. The biomass yield followed a quadratic trend with the increase of AM inoculum rate from 0 to 2.0 kg/m 2 in 2007-08 and 0 to 1.5 kg/m 2 in 2008-09.

Keywords: Tomato seedlings, Arbuscular mycorrhiza, nutrient uptake.

Location:

Start Date:

End Date:

Program Area:

Commodity:

Objectives:

The present investigation was therefore undertaken to observe the effect of different rates of AM inoculum on the performance of tomato seedlings.

Methodology:

An experiment on tomato seedlings was conducted in the seedbeds (3 m × 1 m) of Soil Science Division, Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur, Bangladesh during the rabi season of 2007-08 and 2008-09. Silted soil from the bank of Turag river at Kodda, Gazipur was used in the seedbed. The soil of the seedbed was sandy clay loam in texture having pH 7.4, organic matter 0.53%, total N 0.03%, available P 11.0 μg/g, available S 10.0 μg/g, exchangeable K 0.15 meq/100g, exchangeable Ca 3.80 meq/100g, exchangeable Mg 1.10 meq/100g, available Zn 2.50 μg/g, available B 0.14 μg/g, available Cu 2.10 μg/g, available Fe 35 μg/g, and available Mn 11 μg/g. The soil was slightly alkaline in reaction. Organic matter, major nutrients, and zinc and copper contents of the soil were low, while iron and manganese levels were quite high. The soil contained 10 AM spores of indigenous mixed AM fungal species and the experiment was conducted under non-sterilized soil condition. The experiment was laid out in randomized complete block (RCB) design with four replications. Seven rates of mixed AM inoculum viz., 0, 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 kg/m 2 were studied on tomato seedlings. The seed bed was divided into seven separate unit plot by inserting thick polyethylene sheet upto 25 cm depth of soil to check the contamination of AM among the plots. Cowdung was used at the rate of 5 kg/m 2 . No other fertilizers were used. Seeds were sown in 10 cm apart lines on 13 November 2007 and 11 November 2008. Soil based AM inoculum was used in the seed furrows of about 3 cm depth. A soil layer of about 1 cm thickness was spread on the inoculum layer on which the seeds were sown. Roma VF was used as the variety of tomato. The seedlings were thinned down to about 3 cm from seedling to seedling within a week of germination. Watering, weeding, and other intercultural operation were done as and when necessary. The seedlings were harvested on 11 December 2007 and 17 December 2008. Data on biomass yield and yield components were recorded. Plant samples were oven dried at 70oC until constant weight. Chemical analyses of the samples were done and nutrient uptake by the seedlings was calculated. Data were analyzed using the statistical package IRRISTAT.

Source of Information: ISSN 0258-7122 Bangladesh J. Agril. Res. 38(3): 473-480, September 2013

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the results, it is evident that the biomass yield, root colonization, spore number in rhizosphere soil and nutrient uptake by tomato seedlings increased significantly with the use of AM inoculum. Biomass yield of tomato seedlings followed quadratic trend with the increase of AM inoculum rate.

Knowledge Management: Journal