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Effect of Different Sources of Arbuscular Mycorrhiza on the Performance of Summer Tomato Seedlings

M.A. Satter
Soil Science Division, BARI, Gazipur-1705.

D. Khanam
Soil Science Division, BARI, Gazipur-1705.

M.M. Rahman
Soil Science Division, BARI, Gazipur-1705.

A.T.M. Farid
Soil Science Division, BARI, Gazipur-1705.

Md. Shahajahan
Soil Science Division, BARI, Gazipur-1705.

Abstract/ Executive Summary:

A pot study on the effect of different sources of Arbuscular mycorrhizal (AM) fungi on summer tomato seedlings was conducted in the net house of Soil Science Division, BARI, Gazipur during the first week of March to first week of April, 2003. One kg of silty clay loam soils of Chhiata series from Gazipur mixed with cow dung at 5 : 1 ratio was used pori as the potting media. The AM fungi collected from Jamalpur, Joydebpur, Ishurdi and Hathazari, their mixture and an Exotic source were studied along with Control. Soil based AM inoculum was used at the rate of 50g por^-1. Growth, biomass yield and nutrient uptake of inoculated seedlings were significantly higher than those of uninoculated seedlings. Such higher growth and nutrient uptake appeared to be due to beneficial effects of AM fungi. The AM fungi collected from Joydebpur and Ishurdi was found better among different sources. Inoculation with AM fungi helped to produce healthy and vigorous seedlings with faster growth. This would help to reduce nursery life and thereby cost of seedling production. The AM inoculated seedlings might also perform better in the field since the fungi could be carried over to the field through the colonized roots

Keywords: Arbuscular mycorrhizal (AM), Fungi, Summer tomato seedlings.

Location: Soil Science Division, BARI, Gazipur

Start Date: 00-03-2003

End Date: 00-04-2003

Program Area: Seed Technology

Commodity: Tomato

Objectives:

(i) To observe the effect of different sources of AM fungi on the performance of summer tomato seedlings,

(ii) To identify better source(s) of AM for producing summer tomato seedlings,

(iii) To produce summer tomato seedlings with AM colonization.

Methodology:

A pot study on the effect of different sources of AM fungi on summer tomato seedlings was conducted in the net house of Soil Science Division, BARI, Gazipur during the first week of March to first week of April, 2003. Silty clay loam soils of Chhiata series from Gazipur mixed with cow dung at 5 : I ratio was used in the study. The mixture was sterilized with 10 percent formaldehyde solution to inactivate the native AM fungi. One kg of this sterilized mixture was used per pot as the potting media. The soil was acidic in reaction. The major nutrient contents of the soil were low, while the levels of micronutrients were quite high. The experiment was laid out in RCBD with four replications. Effect of AM fungi collected from Jamalpur, Joydebpur, lshurdi and Hathazari, their mixture and an Exotic source were studied along a Control on summer tomato variety BARI tomato-4. Perforated black polythene bag was used as the pot. A hole of 6cm in diameter and 5cm in depth was dug at the center of the potting media. The soil based AM inoculum at the rate of 50g spore^-1 containing 105 to 120 spores 100 g^-1 soil along with infected root pieces of the host plants was placed in the hole. A soil layer of about lcm was spread on the inoculum layer. Tomato seeds were sown in the soil layer above the inoculum to ensure penetration of the roots through the inoculum layer immediately after germination. The seedlings were thinned out within a week of germination keeping five uniform seedlings per pot. Watering and other intercultural operations were done as and when necessary. The biomass yield and yield components of seedlings were recorded on the day of harvesting. Seedling height was measured from the soil layer to the tip of the stem. Collar diameter was measured with a slide calipers I cm above the soil layer. The seedlings were harvested carefully by uprooting at an age of 32 days after sowing (DAS). The roots were washed to remove the adhered soils. Root samples were then excised for AM colonization studies. Fresh weight of the seedlings was recorded. The seedlings were then oven dried to a constant weight at a temperature of 70°C and the dry weight was recorded. The dried plant samples were ground and used for chemical analysis. Soil samples from the pot were collected during harvesting the seedlings for counting AM spore population. Hundred grams soil sample per pot was used to count the spore numbers. The spore numbers were determined by wet sieving and decanting method.

Source of Information: Journal Soil Health & Environment, Vol: 1(2): pp:89-95

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

P utilization efficiency (PUE) of AM inoculated Acacia mangium seedlings (0.330g biomass mg' P) was found significantly higher than that of uninoculated seedlings. Better performance of tomato seedlings with AM inoculation in the present study might be due to higher uptake of nutrients and their efficient utilization in From the results it is evident that AM fungi have potential to improve uptake of all the major- and micro- nutrients and thereby to enhance faster growth of summer tomato seedlings. Improvement in nutrient uptake also enhanced production of healthy and vigorous seedlings. Faster growth of seedlings might help to shorten the nursery life, and thereby would reduce the cost of seedling production. The inoculated seedlings might also perform better in the field because the AM fungi could be carried over to the field through the colonized roots. Based on biomass yield and nutrient uptake the AM inoculum sources from Joydebpur and Ishurdi might be considered better for growing summer tomato seedling.

Knowledge Management: Journal