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Effect of Different Water Management Practices and Sowing Dates on Aman 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.Experiment was set-up in split-split plot design with three replications at BRRI farm, Gazipur in Aman and Boro season 2005 and 2006. There were four sowing date on main plot and three water treatments were in sub plot. Water treatments were: rainfed, one irrigation at vegetative stage and one at reproductive stage and one irrigation at vegetative stage and two at reproductive stage. Sowing dates were: 16 June, 1 July, 16 July and 31 July. Rice cultivars BRRI dhan39 was used. Pre germinated seeds were sown in line by drum seeder in puddled soil at different sowing date. For the case of 1^st sowing (S₁), 27 mm rainfall occurred on 15^th June. Sowing was done on 18^th June and next rainfall occurred on 23^rd June. So, seedlings were properly established. There was no rainfall for 10 days from 25 July to 4^th August and therefore seeding suffered from water stress at tillering stage. So, yield was reduced in rainfed condition. Another two water stress occurred during reproductive stage from 54 to 64 days and 65 to 78 days, which hampered yield. So, yield were reduced in I₁ and I₂ irrigation treatment plots. For the case of 2^nd sowing (S₂), during maximum tillering stage, there was no water stress. During reproductive stage plants did not suffer from water stress. So, yield was high and no significant difference in grain yield was found among the different water treatments. A 10 day long water stress occurred after 9 days of seedling in the 3^rd sowing treatment and the crop suffered. Minimum rainfall occurred during maximum tillering stage, A 7 day long water stress occurred at panicle initiation stage and minimum rainfall occurred at grain filling stage. So, yield was reduced in I₁ and I₂ water treatmentI. In 4^th sowing (S₄), seeds are sown on 31 July. Sowing was done after applying 90 mm of water for land preparation and after sowing minimum water was applied by sprinkling. Seed was established properly. No water stress was found at maximum tillering, panicle initiation and grain filling stages. So, yield was higher in all the water treatments.

Keywords: Water management, Sowing date, Water productivity, Supplemental irrigation

Location: BRRI farm, Gazipur

Start Date: 01-07-2005

End Date: 31-12-2005

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

i) To identify appropriate sowing time;

ii) To identify the best water management practice; and

iii) To compare the interaction of sowing time and water management practice.

Methodology:

Experiment was set-up in split-split plot design with three replications at BRRI farm, Gazipur in Aman and Boro season 2005 and 2006. There were four sowing date on main plot and three water treatments were in sub plot. Water treatments were: rainfed, one irrigation at vegetative stage and one at reproductive stage and one irrigation at vegetative stage and two at reproductive stage. Sowing dates were: 16 June, 1 July, 16 July and 31 July. Rice cultivars BRRI dhan39 was used. 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. Herbicide and insecticide were used to control weeds and insect-pests. Rice yield was estimated by harvesting samples from 1 m² area. Harvested paddy was threshed, cleaned and weighed for determine the yield. Finally, the yield was adjusted at 14% moisture content for determining yield per hectare.

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

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Total rainfall during the growing period varied from 1055 to 1489 mm. WUE was highest in S₄I₁ treatment (112%). Water productivity was highest (4.81 kg/ha-mm) in treatment S₄I₁. Highest yield was obtained from S₁I₃ treatment (3.84 t/ha). For the case of 1^st sowing (S₁), 27 mm rainfall occurred on 15^th June. Sowing was done on 18^th June and next rainfall occurred on 23^rd June. So, seedlings were properly established. There was no rainfall for 10 days from 25 July to 4^th August and therefore seeding suffered from water stress at tillering stage. So, yield was reduced in rainfed condition.

Knowledge Management: Report/Proceedings