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Evaluation of a Small Basin Water Harvesting System in BARInd Area to Produce Low Water Demand Crops

Dr. A. A. Sarkar
CSO
BINA, Mymensingh

Dr. M. H. Ali
SSO
BINA, Mymensingh

Dr. N. N. Karim
SSO
BINA

M.A. Rahman
SO
BINA

M. Hasanuzzaman
SO
BINA

Abstract/ Executive Summary:

This study was undertaken to explore the possibility of rain water harvesting using existing pondS of local farmers and to see the feasibility of growing low water-demand crops during rabi and Kharif-1 seasons in Barind area. A farmer’s pond of 3306 m² area was used for storing rain water to be used as irrigation water source at Nachole, Chapainawabganj. The crop rotation followed for the experiment was Rice (Binadhan-7) – Legume (Binasola-4) – Legume (Binamoog-5). Binadhan-7 rice seedlings were transplanted on 26^th July 2008. Rice was grown under rainfed condition. Experimental design was randomized complete block with three replications. Irrigation treatments which followed for Binasola-4 were: T₀ = No irrigation, T₁ = Irrigation at vegetative and flowering stages and T₂ = Irrigation at vegetative and pod formation stages. After the harvest of Binasola-4, legume crop, mungbean (cv. Binamoog-5) was sown on 28^th March 2009, on the same layout of Binasola-4. At the sowing time of Binamoog-5, moisture content of soil was very low. About 3.0 cm post-sowing irrigation was applied to ensure germination of the seeds. The amount of water left in the pond after the harvest of chickpea was sufficient for post-sowing irrigation of Binamoog-5. Irrigation treatments followed for Binamoog-5 were: T₀ = No irrigation, T₁ = Irrigation at vegetative stage and T₂ = Irrigation at flowering stage. Irrigation had significant effect on plant height, number of branch, number of pods plant^-1, seed yield and straw yield of Binasola-4. The highest seed yield was obtained with T₂ treatment (irrigation at vegetative and pod formation stage) followed by T₁ treatment (irrigation at vegetative and flowering stages), T₀ (no irrigation), respectively. Water requirement was the highest in T₂treatment due to the applied irrigation water and soil moisture depletion.Irrigation had significant effect on seed yield of Binamoog-5. The highest seed yield was obtained in T₂treatment followed by T₁and T₀treatment though same irrigation water was applied in T₁and T₂treatment due to rainfall. Thus, it was revealed that rainwater harvest in existing pond in Barind area provides an immense source of limited surface water for irrigation to bring more fallow land under cultivation with low water demand rabi crops (e.g. chickpea) applying two irrigations and Kharif-1 crops (summer mungbean) applying a simple pre or post-sowing irrigation and thereafter one more irrigation at flowering stage.

Keywords: Drought, Water management, Soil moisture

Location: Nachole, Chapainawabganj (Barind Area, Rajshahi)

Start Date:

End Date:

Program Area: Resource Development and Management

Commodity: Rain water

Objectives:

This study was undertaken to explore the possibility of rain water harvesting using existing ponds of local farmers and to see the feasibility of growing low water-demand crops during Rabi and Kharif-1 seasons in Barind area.

Methodology:

A farmer’s pond of 3306 m² area was used for storing rain water to be used as irrigation water source at Nachole, Chapainawabganj. The crop rotation followed for the experiment was Rice (Binadhan-7) – Legume (Binasola-4) – Legume (Binamoog-5). Binadhan-7 rice seedlings were transplanted on 26^th July 2008. Rice was grown under rainfed condition. Fertilizer dose and other cultural practices were followed as were recommended for the variety. The crop was harvested on 8^th November 2008. Total rainfall received during the experimental period (transplanting to harvest) was 219.60 mm. At harvest time, soil moisture profile, yield and other parameters were recorded. After rice, Binasola-4 was sown in the same layout on 19^th November 2008. Experimental design was randomized complete block with three replications. Irrigation treatments which followed for Binasola-4 were: T₀ = No irrigation, T₁ = Irrigation at vegetative and flowering stages and T₂ = Irrigation at vegetative and pod formation stages. At the sowing time of chickpea, soil moisture status was recorded. Fertilizer dose and other cultural practices were followed according to the field and crop condition. Depth of irrigation water was determined as crop coefficient multiplied by reference crop evapotranspiration and applied to the treatment plots. Soil moisture was determined by gravimetric method up to 60 cm for every 15 cm increment at the time of sowing, before and after irrigation and harvest time. Binasola-4 was harvested on 27^th March 2009. Yield data along with other parameters of Binasola-4 were collected at the harvest time. Pond water depth was also measured during the experimental period. After the harvest of Binasola-4, legume crop, mungbean (cv. Binamoog-5) was sown on 28^th March 2009, on the same layout of Binasola-4. At the sowing time of Binamoog-5, moisture content of soil was very low. About 3.0 cm post-sowing irrigation was applied to ensure germination of the seeds. The amount of water left in the pond after the harvest of chickpea was sufficient for post-sowing irrigation of Binamoog-5. Irrigation treatments followed for Binamoog-5 were: T₀ = No irrigation, T₁ = Irrigation at vegetative stage and T₂ = Irrigation at flowering stage. All cultural practices were followed during the crop growing period. At the harvest time of the crop, soil moisture, yield and yield attributes were recorded.

Source of Information: Annual Report 2008-09, Bangladesh Institute of Nuclear Agriculture (BINA), pp. 258

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It was revealed from the study that rainwater harvest in existing pond in Barind area provides an immense source of limited surface water for irrigation to bring more fallow land under cultivation with low water demand rabi crops (e.g. chickpea) applying two irrigations and Kharif-1 crops (summer mungbean) applying a simple pre or post-sowing irrigation and thereafter one more irrigation at flowering stage.

Knowledge Management: Report/Proceedings