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Salinity Tolerance in Rice Lines and Their Production Potentials

Dr. Md. Tariqul Islam
Principal Scientific Officer and Head
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

M. A. Islam
Crop Physiology Division, BINA, Mymensingh

R. K. Dutta
Ex-Director General
Bangladesh Institute of Nuclear Agriculture, Mymensingh

Abstract/ Executive Summary:

In an experiment relating to salinity, rice lines BINA-13 and BINA-19 produced higher yield than Pokkali at salinity level of 3.6-6.9 dS/m and maintained comparable yield with Pokkali at higher salinity of 4.9-7.9 dS/m. Zarrak and Chinese recorded the highest and lowest yield, respectively compared to the above lines. BINA-13, BINA-19 and Pokkali had less leaf area at 60 days after transplanting than Zarrak and Chinese. Plant height of BINA-13 and BINA-19 was lower but number of effective tillers and total dry matter (TDM) were similar with Pokkali at EC level 3.6-6.9 dS/m. Filled grains/panicle and HI at maturity were higher in BINA-13 and BINA-19 at lower salinity (3.6-6.9 dS/m) but similar with Pokkali at higher salinity level (4.9-7.9 dS/m). Zarrak had medium plant height, highest number of effective tillers, 1000-grain weight, filled grains/panicle and TDM. Chinese produced the shortest plant with lowest number of filled grains/panicle and seed yield under low and high salinity levels. The result suggested that Zarrak, BINA-13 and BINA-19 can be grown in salinity levels ranging between 3.6-6.9 dS/m for high yield.

Keywords: Salinity, Tolerance, Rice, Yield

Location: Bangladesh Institute of Nuclear Agriculture, Mymensingh

Start Date: 20-01-1996

End Date: 30-12-1997

Program Area: Variety and Species

Commodity: Rice

Objectives:

The objectives of the study were to evaluate rice lines in saline area and to find out salt tolerant line.

Methodology:

Two experiments were conducted at the Benarpota farm of Bangladesh Water Development Board (BWDB) at Satkhira, 1996 and 1997. Two rice lines along with a check variety Pokkali (salt tolerant) were taken for the experiment. The design of the experiment was RCBD with 3 replications. The unit plot size was 4m x 3m with 20cm x 15 cm plant spacing. For one hill one seedling was transplanted. The soils of the experimental farm were analyzed by Aich etal. 1994. The soils were clayey in nature. The range of organic matter total N, available P, CEC varied froml.86 to 2.15, 0.15 to 0.19, 16 to 20 mg kg^-1 and 29.8 to 32.4 (meq/100 g), respectively. The EC ranged from 2.0-13 0 dS/m in soils of different locations of Benarpota farm campus. The soils were fertilized with 80 kg P₂0₅, 40 kg K₂0 and 90 kg N/ha. P and K and one third dose of N were applied basally. The remaining two thirds of N dose were applied at tillering and booting stages in two equal splits. Transplantation was done on January 20, 1996. Soil salinity of the experimental field during the crop growth was measured as EC at every 15 days’ intervals starting from January 20, 1996 at the depth of 0-15 cm and 16-30cm and plotted separately. At maturity, plant height, number of effective tillers/hill, panicle length, number of grains/panicle, total dry matter (TDM)/m², seed yield/m² and HI were recorded from randomly selected 10 plants. DMRT tests were done to evaluate the mean data.

Source of Information: Bangladesh J. Nuclear Agric. 14 : 63-69, 1998

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Rice lines BINA-13 and BINA-19 produced higher yield than Pokkali at salinity level of 3.6-6.9 dS/m and maintained comparable yield with Pokkali at higher salinity of 4.9-7.9 dS/m.

Knowledge Management: Journal