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Interaction Effect of Submerged Water Levels Seedling of Boro Rice (oryza Sativa L.)

Md. Maksudul Haque
Scientific Officer
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

Hasina Khatun
Scientific Officer
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

Md. Anisuzzaman
Scientific Officer
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh

Elora Pervin
Dept. of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Abstract/ Executive Summary:

The field experiment was conducted at experimental field of Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur in Boro season with a view to find out the influence of water level and seedling number hill^-1 on growth and yield of Boro rice. The experiment was carried out in split-plot design with 3 replications. It revealed that continuous submerged condition (2-5 cm standing water) gave the highest performance in respect of plant height, tiller number hill^-1, leaf area index, dry matter and duration of flowering. Continuous submerged condition showed significantly taller plant height all the growing period except 30 days after transplanting. Tiller numbers hill^-1 significantly influenced at 30, 45, 75 DAT and at harvest. Leaf area index (LAI) significantly influenced by water levels all the growing period except at early and harvesting time. Duration of flowering significantly earlier (103.83) at submerged condition compare to saturated condition (105.75). Among the growth characters tiller numbers hill^-1 and leaf area index significantly influenced by the different number of seedling hill^-1, whereas plant height, dry matter production and duration of flowering was unaffected. Considering the tiller production hill^-1 was significantly similar from 2 to 4 seedlings hill^-1 in which single seedling hill^-1 showed lowest performance up to 75 DAT but at harvest there was no significant variation among the treatments. Leaf area index was significantly differed upto 45 DAT, whereas 2 to 4 seedlings hill^-1 showed significantly highest value compare to single seedling hill^-1.

Keywords: Submerged, Interaction, Leaf Area Index, Dry Matter, Boro Rice (Oryza sativa L.)

Location: Experimental field of Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur

Start Date: 00-01-2013

End Date: 00-06-2013

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

Objective of the study was to find out the influence of water level and seedling number hill^-1 on growth and yield of Boro rice.

Methodology:

The experiment was experimental field of Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur split-plot design with 3 replications having two levels of water in main plot and 4 levels of seedling number hill^-1 in the sub plot. There were 8 treatment combinations. The total numbers of unit plots were 24. The size of unit plot is 5 m x 3 m. The distances between plot to plot and replication to replication were 1 and 1.5 m respectively. The water levels were continuous saturated (S₁) & continuous submerged (S₂) condition as well as seedling numbers were 1 (T₁), 2 (T₂), 3 (T₃) & 4 (T₄) seedlings hill^-1. At the time of first ploughing cowdung at the rate of 10 t ha^-1 was applied. The experimental area was fertilized with 120, 80, 80, 20 and 5 kg ha^-1 N, P₂O₅, K₂O, S and Zn in the form of urea, triple superphosphate (TSP), muriate of potash (MP), gypsum and zinc sulphate respectively. The entire amounts of triple superphosphate (TSP), muriate of potash (MP), gypsum and zinc sulphate were applied at final land preparation. The first one-third urea was top dressed at 7 days after transplanting (DAT). The rest of urea was top dressed in three equal splits- one at 23 days after transplanting (DAT), second at 38 days after transplanting (DAT), and the other at panicle initiation stage (52 DAT). Two sets of treatments included in the experiment were as follows: A. Irrigation water levels (2): S₁= Saturated (No deficit or stagnation of water) and S₂= Submerged (Continuous 2-5 cm standing water) B. Seedling(s) number hill^-1 (4): T₁= 1 seedling hill^-1, T₂= 2 seedlings hill^-1, T₃= 3 seedlings hill^-1 and T₄= 4 seedlings hill^-1. Recording of data of Crop growth characters: Plant height (cm) at 15 days interval, Number of tillers hill^-1 at 15 days interval, Leaf area index at 15 days interval and Dry weight of plant at 30 days interval and Time of flowering. The data collected on different parameters were statistically analyzed to obtain the level of significance using the IRRISTAT computer package program developed by IRRI. The mean differences among the treatments were compared by least significant difference test at 5% level of significance.

Source of Information: J. Basic. Appl. Sci. Res., 5(3)19-28, 2015

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Transplanting of younger seedlings in combination with intermittent submerge performed the best in tiller production, growth dynamics, yield contributing characters and produced more productive tillers hill^-1. Intermittent submerge was suitable for exploring the physiological potentials of rice seedlings on effective tillers for increasing grain yield.

Knowledge Management: Journal