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Effect of Different Water Management Practices and Sowing Dates on Boro Rice Cultivation by Drum Seeding Wet Method-2006

Dr Shahana Parveen
SSO
IWMD, BRRI

Dr M A Sattar
CSO and Head
IWMD, BRRI

Abstract/ Executive Summary:

A field experiment was conducted to identify appropriate sowing time; to identify the best water management practice; and to compare the interaction of sowing time and water management practice. Growth duration varied from 124 to 141 days and the standard growth duration was 140 days. Growth duration of rice was less in 31 December sown. Total rainfall during the growing period varied from 14 to 95 mm. Later two treatments received maximum rainfall. Water applied for land preparation varied from 160 to 230 mm. Total number of irrigation varied among different water treatment and different sowing time. Water treatment I₁S₄ required 27 no. of irrigation. Number of irrigation was almost similar in treatment I₁ and I₃ for all sowing date but amount of water varied. Amount of applied irrigation water was higher in S₃and S₄_. In water treatment I₁, applied water was 25% higher than the water requirement. In treatment I₃, applied water was very close to ET demand. Water Use Efficiency (WUE) varied among different sowing date and different water management practices. WUE was lowest in S₃I₁ treatment (82%) and highest in S₁I₃ treatment (133%). Minimum water productivity was achieved in water treatment I₁and maximum in water treatment I₂ and I₃.

The plant height was varied from 76 to 84.8 cm. The highest plant height was observed in sowing date S₁ and water treatment was I₁ and I₂. Effective tillers per square meter varied among sowing date but not in water treatment. It was varied from 585.7 to 409. The highest number of effective tillers per square meter was found in treatment S₁ followed by S₃. The lowest number of effective tillers was observed in treatment S₄ followed by S₂. But filled grain/ panicle was drastically reduced by sowing time. The highest filled grain / panicle was 98.2 was observed in treatment S₄I₁. The lowest filled grain was found in treatment S₁I₃. Grain sterility in percentage was vary with water treatments and sowing dates. It was highest in S₁I₂. 1000 grain weight (gm) was almost similar in all the treatments. Rice yield vary with both the water treatment and sowing time. Maximum yield was obtained from S₄I₃ treatment (6.29 t/ha). Except 31^st December sowing, water management of 3 days after disappearing standing water gave higher yield in all treatment of sowing date.

Keywords: Water management, Boro rice, Drum seeding

Location: BRRI farm, Gazipur

Start Date: 01-11-2005

End Date: 30-05-2006

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

To identify appropriate sowing time;
To identify the best water management practice; and
To compare the interaction of sowing time and water management practice.

Methodology:

Water treatments were I₁ = Standing water upto 5-7cm, I₂ = Irrigation at 3 days after disappearing of standing water and I₃ = Water maintaining at saturation level and sowing dates were S₁ = 16 November, S₂= 1 December, S₃= 16 December and S₄= 31 December. Rice cultivars BRRI dhan28 was used in Boro season. Pre germinated seeds were sown in line by drum seeder in puddled soil at different sowing date. Individual plot size was 2.4 m x 4.5 m having 1.0 m x 0.5 m buffers area around each experimental unit. Fertilizer management, weed management and other cultural management practices were followed as per BRRI recommendation. Fertilizer doses were applied at the rate of 220-120-85-60-10 kg/ha of Urea, TSP, MP, gypsum and Zinc sulfate, respectively. Except urea all fertilizers were applied during the final land preparation. Urea was applied in four equal splits at 25, 40, 55 and 65 days after sowing (DAS). Irrigation water was applied as per water treatment and was measured by using a vertical gauge installed in the middle of experimental plot.

Source of Information: Proceedings of the BRRI Annual Internal Review for 2006, BRRI, Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Growth duration varied from 124 to 141 days and the standard growth duration was 140 days. WUE was lowest in S₃I₁ treatment (82%) and highest in S₁I₃ treatment (133%). Minimum water productivity was achieved in water treatment I₁and maximum in water treatment I₂ and I₃.

The plant height was varied from 76 to 84.8 cm. The highest plant height was observed in sowing date S₁ and water treatment was I₁ and I₂. Effective tillers per square meter varied among sowing date but not in water treatment. It was varied from 585.7 to 409. The highest number of effective tillers per square meter was found in treatment S₁ followed by S₃. The lowest number of effective tillers was observed in treatment S₄ followed by S₂. But filled grain/ panicle was drastically reduced by sowing time. The highest filled grain / panicle was 98.2 was observed in treatment S₄I₁. The lowest filled grain was found in treatment S₁I₃. Grain sterility in percentage was vary with water treatments and sowing dates. It was highest in S₁I₂. 1000 grain weight (gm) was almost similar in all the treatments. Rice yield vary with both the water treatment and sowing time. Maximum yield was obtained from S₄I₃ treatment (6.29 t/ha). Except 31^st December sowing, water management of 3 days after disappearing standing water gave higher yield in all treatment of sowing date.

Knowledge Management: Report/Proceedings