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Carbon Di-oxide–c Emission from Amended Soil in Laboratory Condition

Pranesh Kumar Saha
Principal Scientific Officer
BRRI, Gazipur

A.T.M.Sakhawat Hossian
Senior Scientific Officer
BRRI, Gazipur

M Khatun

Abstract/ Executive Summary:

The CO₂-C emission from different organic sources with soil showed that the rate of CO₂-C emission was higher in early period and subsequently decreased around 75-85 days and then increased irrespective of sources and their combination in both flooding and moist condition. Apparently there are no sharp differences of CO₂-C emission between flooding and moist condition. Among the sources Rice straw emitted more than other sources. However, the slightly increase of CO₂-C emission in later period might be the death of soil micro-organisms and their subsequent cell decomposition.

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

Location: BRRI farm, Gazipur

Start Date: 01-07-2011

End Date: 30-06-2012

Program Area: Crop-Soil-Water Management

Non-commodity: Emission and measurement of green-house gas

Objectives:

To determine the CO₂-C emission rate of some OM under moist and flooding situation in the laboratory condition.

Methodology:

This experiment has been set up in the laboratory of Soil Science Division, BRRI on April 12, 2011 at room temperature for 120 days. AEZ 1 soil was used in this experiment. Soil sample was analyzed for pH, organic carbon, total N, available P and exchangeable K that are presented in Table 22. Similarly the sources were also analyzed and presented in Table 23. In this experiment 100 g of soil and different organic sources @ 5 t C/ha (0.25 g C/100 g soil or without soil) placed in plastic jar (1100 ml air tight) according to treatments in two moisture regimes i.e. moist and flooding condition. The experiment was laid out in RCBD factorial with two replications. Organic materials were considered as factor A and moisture regimes were factor B. Treatment wise carbon-di oxide-C measured up to 127 days.

Source of Information: Proceedings of BRRI Annual Internal Research Review, 2011- 2012

Article Link (Online Journal):

Funding Source:

1. Bangladesh Agricultural Research Council

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The rate of CO₂-C emission was higher in earlier stage of incubation irrespective of organic sources in both flooding and moist condition. However, rice straw emitted more CO₂-C than cow dung, poultry manure and rice root alone.

Knowledge Management: Report/Proceedings