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Response of Tomato (lycoperscon Esculentum) to Salinity in Hydroponic Study

M. A. H. Shimul
ACI Limited, Tejgaon Industrial Area, Dhaka.

Ito Shin-ichi
Depertment of Biological and Environmental Sciences, Yamaguchi University, Japan.

S. Sadia
Department of Agricultural Extension and Information System, Sher-e-Bangla Agricultural University, Dhaka.

M. Z. K. Roni
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka.

A. F. M. Jamal Uddin*
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka.

Abstract/ Executive Summary:

An experiment was accomplished at Horticulture Research Center (HRC), Bangladesh Agricultural Research Institute (BARI), Gazipur, during the period of 2011-2012, to find out the growth and yield of tomato in different salinity level. Five salinity levels were accounted at T₀, Control; T₁, 4 dS m^-1; T₂, 8 dS m^-1; T₃, 12 dS m^-1 and T₄, 16 dS m^-1 treatments respectively

Keywords:

Location: Horticulture Research Center, Bangladesh Agricultural Research Institute, Gazipur

Start Date: 00-00-2011

End Date: 00-00-2012

Program Area: Risk Management in Agriculture

Commodity: Tomato

Objectives:

To investigate the different salinity level for growth and yield of tomato

Methodology:

A hydroponic culture study was conducted in Horticulture Research Center (HRC), Bangladesh Agricultural Research Institute (BARI), Gazipur during the period of 2011-2012, to find out the growth and yield of tomato in different salinity level. The experiment was laid out in Completely Randomized Design (CRD) with four replications. Salinity levels were accounted at T₀, Control; T₁, 4 dS m^-1; T₂, 8 dS m^-1; T₃, 12 dS m^-1 and T₄, 16 dS m^-1 treatments respectively. Tomato seed (var. BARI Tomato 14) was collected from Olericulture Division, HRC, BARI, Gazipur. Tomato seeds were germinated in open polythene coated iron trays containing foam. Size of each foam was 3 m x 2 m and thickness was 2.5 cm. Furrow to furrow distances in each direction was 2 cm and as such 2 cm x 2 cm blocks were made. A ½ cm depth cut was made at the centre of each block in which seeds were put. The foams were placed on water in 3 m x 4 m water tanks made in steel plate. Germination of seedlings was monitored and recorded everyday. Proper aeration of the culture solution was provided for 10 minutes daily by a bamboo stick. At two-leaf stage, seedlings of uniform size were transplanted in foam-plugged holes of polystyrene sheets floating over 1/2 strength Hoagland’s nutrient solution. Two seedlings were considered as one replication. Cork sheet was used on the water tank to hold the seedlings in the nutrient solutions. Salinity treatments were developed by adding NaCl in three/four applications was given in starting two days after transplanting. No NaCl was added in the control treatment. Electrical Conductivity Meter (EC meter) was used to measure the salinity of the nutrient solution. The pH of the solution was monitored daily and adjusted at 6.0±0.5, when needed. The substrate solutions were changed fortnightly. Total chlorophyll content was measured by a hand-held chlorophyll meter (SPAD reading, Minolta Camera Co., Osaka, Japan) at the four weeks plants in each treatment. Leaf area was recorded by leaf area meter (CL-202 Leaf Area Meter, USA). In stomatal resistance determination we applied a diffusion porometer (Delta T Manufacturers, AP4 type transient porometer). The data were analyzed statistically by MSTAT-C to find out the significance of the difference among the treatments. Mean values of all the characters were evaluated and analysis of variance was performed by the 'F' (variance ratio) test. The significance of the differences among the pairs of treatment means was estimated by the Least Significant Difference (LSD) test at 5% probability.

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