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Effect of Some Organic Materials as Soil Amendment in Soil and Rice Plant Arsenic.

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 find the effect of cow dung, poultry manure, rice straw and ash amendment on the changes of soil and plant arsenic level. This experiment was conducted at BRRI regional station Satkhira during Boro 2010-11 and Boro2011-12 where the soil As and irrigation water As was 15 ppm and 125 ppb respectively. Four soil amendments, namely, cow dung @ 5 t/ha, poultry manure @ 3 t/ha, rice straw @ 3 t/ha and ash @ 5 t/ha were applied. The experimental design was RCB with three replications. Addition of organic manures and inorganic fertilizer did not influence post-harvest soil arsenic level. However yield increased due to addition of organic matter in the arsenic contaminated soil.

Keywords: Poultry manure, Rice straw, Ash, Cow dung

Location: BRRI regional station Satkhira

Start Date: 01-07-2012

End Date: 30-06-2013

Program Area: Crop-Soil-Water Management

Commodity: Land management

Objectives:

To find the effect of cow dung, poultry manure, rice straw and ash amendment on the changes of soil and plant arsenic level.

Methodology:

This experiment was conducted at BRRI regional station Satkhira during Boro 2010-11 and Boro2011-12 where the soil As and irrigation water As was 15 ppm and 125 ppb respectively. Four soil amendments, namely, cow dung @ 5 t/ha, poultry manure @ 3 t/ha, rice straw @ 3 t/ha and ash @ 5 t/ha were applied. The experimental design was RCB with three replications. The unit plot size was 5 X 5 m2. The test variety was BRRI dhan28. The rates of fertilizers were N, P, K, S and Zn @ 120-10-56-10-1 kg/ha from urea, TSP, MP, gypsum and zinc sulfate, respectively. The rate of inorganic nutrients (fertilizer) for each of the soil amendment treatments was calculated on the basis of their availability in the amendments (IPNS approach). Arsenic content in grain and water was determined in hydride generation-Atomic absorption spectrophotometer.

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:

Significantly higher grain yield was obtained with poultry manure, rice straw and ash than cow dung and inorganic fertilizer during Boro, 2011. Addition of organic manures and inorganic fertilizer did not influence post-harvest soil arsenic level. In Boro 2012, poultry manure and rice straw produced significantly higher grain yield than ash, cow dung and inorganic fertilizer treatments. Post-harvest soil analysis indicates that the second time addition of these organic sources did not bring any change in soil arsenic status in reference to initial soil arsenic. Straw and paddy arsenic was not influenced by the addition of different organic source in soil. However in Boro, 2011 significantly higher paddy arsenic was found with rice straw and ash treatment than the other treatments even though such difference was not observed in second year experiment. This result needs further confirmation.

Knowledge Management: Report/Proceedings, Booklet/Leaflet