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Development of Suitable Salinity Management Techniques and Their Environmental Impact Assessment on the Eco-system of Bangladesh: Impact of Soil Salinity Dynamics on Environment

Dr Manoranjan K Mondal
SSO
IWM Division, BRRI

Dr Sanjida Parveen Ritu
SSO
IWM Division, BRRI

Abstract/ Executive Summary:

Objective of this study was to determination of the impact of soil salinity dynamics on environment. It was found from this study that the surface soil became very hard due to lack of moisture and grasses cannot grow there. As no or little grass is found from March to May, grazing animals have difficulty in taking grasses to satisfy hunger. Yet those animals try hard to take grasses from the fields. Taking grasses from the bone-dry salty fields, severe eruptions were noticed in the leaf/mouth of the grazing animals. As a result they suffered both from diseases and malnutrition due to increased soil salinity in the summer months. Even the flora and fauna were also decreased due to higher soil salinity.

Keywords: Soil salinity dynamics, Environment, Salinity management techniques.

Location: Kismat Fultola, Khulna

Start Date: 01-01-2001

End Date: 30-06-2001

Program Area: Risk Management in Agriculture

Commodity: Soil salinity

Objectives:

To determination of the impact of soil salinity dynamics on environment

Methodology:

The survey was conducted at Kismat Fultola, Khulna, to determination of the impact of soil salinity dynamics on environment. It was observed from the study that topsoil salinity attained its maximum value in March. But its severity spanned from March to May. During this period most of the fields remained almost bare. Even grasses seldom grew and/or survived. As the area is mono-cropped, farmers of the coastal area used these lands as grazing field from January to June/July. There was no separate grazing field and consequently cattle, goat and buffalo are found to grazing in the fields from January to July. During March to early part of May severe salt build-up took place on the surface soil.

Source of Information: Proceedings of BRRI Annual Internal Research Review, 2001

Article Link (Online Journal):

Funding Source:

1. Bangladesh Agricultural Research Council

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Among the tested soil salinity management techniques, plowing was found more suitable. More grasses were found in the plowed lands than the fallow lands after a dry season shower. Practically no grasses were grown in raised bed plots owing to lack of moisture in the soil. Therefore, plowing of lands after Aman rice harvest not only reduces topsoil salinity, it also helps to grow grasses essential for the grazing animals for their survival.

Knowledge Management: Report/Proceedings