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Characterization and Evaluation of Aerobic Rice Genotypes Under Transplanted Condition

S Akter
Plant Physiology Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh

S Pervin
Plant Physiology Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh

K M Iftekharuddaula
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh

A Akter
Hybrid Rice Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh

R Yasmeen
Plant Physiology Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh

Abstract/ Executive Summary:

Due to over sinking of underground water, scarcity of irrigation water is becoming a threat to the sustainability of irrigated rice production and the concept of aerobic culture appeared prominently. Aerobic rice has the ability to grow under minimum irrigation water and minimum yield reduction occurs when grown under aerobic culture with less water. This experiment aimed to evaluate two advanced aerobic rice lines under transplanted condition in net house. Two advanced lines, IR83140- B-36-B-B and IR83142-B-71-B-B and two check varieties BRRI dhan28 and BRRI dhan29 were grown in three moisture regimes. The moisture regimes included a) continuous standing water (CSW) b) saturated moisture condition (SMC) and c) moisture content at field capacity (FCM). The experimental units, drum containing 110 kg soil, were arranged in randomized complete block design (RCBD) with five replications. Three to four seedlings of forty days were transplanted at the soil surface of each drum. Seedlings were thinned to one plant per genotypes one week after transplanting. Genotype × water interaction showed significant variation in total dry matter production, panicle length, panicle exertion rate, sterility percentage and yield contributing characters. Irrespective of the genotypes, CSW conditions favored to produce maximum number of tiller and panicle. Although BRRI dhan29 gave the highest yield at both CSW and SMC, IR83142-B-71-B-B produced the highest yield at FCM. However, BRRI dhan28 gave similar yield to that of IR83142-B-71-B-B in FCM treated drums.

Keywords: Aerobic rice, Moisture regimes, Transplanted condition, Growth characters, Yield contributing characters, Yield

Location: BRRI, Gazipur, Bangladesh

Start Date: 00-01-2015

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Groundwater

Objectives:

To determine the Characterization and Evaluation of Aerobic Rice Genotypes under Transplanted Condition

Methodology:

Two advanced lines IR83140-B-36-B-B and IR83142-B-71-B-B along with standard Boro varieties BRRI dhan28 and BRRI dhan29 were evaluated in drum (56 cm x 43 cm) containing 110 kg soil. The soil was fertilized with Urea- TSP-MP @ 50-25-25 g/drum. Forty day aged seedlings were transplanted at 21 January, 2015. Three to four seedlings were transplanted at the soil surface of each drum. Seedlings were thinned to one plant per genotypes one week after transplanting. The experiment was conducted under three water regimes as continuous standing water (CSW), saturated moisture condition (SMC) and moisture content at field capacity (FCM).Water treatment was started at tillering stage. Saturation and moisture content at field capacity were determined through the Gravimetric Method and the desired moisture contents were maintained by quantitatively adding water to the respective drums at two to three days interval. To avoid rainfall all the drums were shaded by polythene sheet. The drums were arranged in RCB design and replicated five times. Photosynthesis data was taken at maximum flowering stage considering flag leaf at the middle portion using LI-6400 portable photosynthesis system. Panicle exertion rate was measured following the formula (Length of the exerted panicle /Total length of panicle)*100. Data on other growth characters, yield and yield contributing characters were collected and analyzed by using CROPSTAT 7.2 statistical software of IRRI.

Source of Information: Bangladesh Rice J. 20 (1) : 45-50, 2016

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The new aerobic rice line IR83142-B-71-B-B demonstrated the least reduction in total dry matter production and grain yield among the tested genotypes under field capacity conditions. The aerobic rice line IR83142-B-71- B-B may be recommended for field evaluation under water stress condition.

Knowledge Management: Journal