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Influence of Arsenic Contaminated Irrigation Water on Some BRRI Rice Varieties

A. Latif Shah
Chief Scientific Officer
Soil Science Division, BRRI, Gazipur

Zakiul Hassan
Scientific Officer
Soil Science Division, BRRI, Gazipur

S. M. Mofijul Islam
Scientific Officer
Soil Science Division, BRRI, Gazipur

M. Sajidur Rahman
Senior Scientific Officer
Soil Science Division, BRRI, Gazipur

Abstract/ Executive Summary:

Objective of this study was to screen rice varieties having low grain As content and are capable of growing in As contaminated soils. Two experiments were conducted at BRRI farm Satkhira and Bhanga, Faridpur during Boro, 2010-11 and Boro, 2011-12 seasons. In this experiment a total of nine BRRI varieties were tested in RCB design with three replications. The arsenic content in paddy of the tested BRRI varieties did not exceed the limit of 1 ppm. However, the arsenic content both in straw and paddy of BRRIdhan47 and BRRI dhan50 was less compared to other tested varieties even grown in medium soil arsenic level (17-20 ppm) assuming less response to arsenic uptake.

Keywords: Screening of rice for arsenic, Arsenic contamination, BRRI varieties

Location: BRRI farm Satkhira and Bhanga, Faridpur

Start Date: 01-07-2012

End Date: 30-06-2013

Program Area: Crop-Soil-Water Management

Commodity: Contamination

Objectives:

To screen rice varieties having low grain As content and are capable of growing in As contaminated soils.

Methodology:

Two experiments were conducted at BRRI farm Satkhira and Bhanga, Faridpur during Boro, 2010-11 and Boro, 2011-12 seasons. In this experiment a total of nine BRRI varieties were tested in RCB design with three replications. The soil of the experimental field contained 17 ppm As at Bhanga and 20 ppm As at BRRI farm, Satkhira. The arsenic content in shallow tube well irrigation water used for the experiments was 419 ppb inBhanga and 124 ppb in BRRI farm, Satkhira.The rates of fertilizer application in Satkhira were N, P, K, S and Zn @ 120-10-56-10-1 kg/ha from urea, TSP, MP, gypsum and zinc sulfate respectively. In Bhanga, the rates were N, P, K, S and Zn @ 115-20-60-12-3 kg/ha from the same sources.

Source of Information: Proceedings of BRRI Annual Internal Review for 2012- 2013

Article Link (Online Journal):

Funding Source:

1. Bangladesh Agricultural Research Council

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The grain yield of BRRI rice varieties obtained at Bhanga, Faridpur and BRRI farm Satkhira seems to be optimum. The arsenic content of straw and paddy remained at minimum level in both locations. Straw arsenic content ranged from 1.68-5.49 ppm while paddy arsenic ranged from 0.31-0.73 ppm irrespective of location and year. It was noticed that comparatively less arsenic content was found in straw and paddy of BRR Idhan47 and BRRI dhan50 among the tested varieties in both locations. It indicates that these two varieties have less affinity to arsenic than the other tested varieties. The mean arsenic uptake per ton dry matter yield of the tested BRRI varieties at harvest ranged from 2.93 to 4.87 g. The lowest arsenic uptake was observed in BRRI dhan50 and BRRI dhan47.

Knowledge Management: Report/Proceedings, Booklet/Leaflet