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Growth and Yield of Boro Rice as Influence by Water Level and Seedling Number Hill-1

SANJIT DHAR
MS. Student
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka,

Abstract/ Executive Summary:

The experiment was conducted at Sher-e-Bangla Agricultural University, during January to June 2006 to find out the influence of water level and seedling number hill-1 on growth and yield of boro rice. Results of the experiment showed that irrigation water levels had a significant influenced on growth characters but insignificant on yield contributing characters and yield. Interaction effect had significant effect on growth as well as yield contributing characters except duration of flowering, effective tillers hill-1 and 1000 grain weight. Total grains panicle-1, filled grains panicle-1 and percent filled grains were significantly lowest at saturated condition with 4 seedlings hill-1 compared to other treatments. Significantly the highest grain yield was recorded from 1 to 3 seedlings hill-1 irrespective of their water level and the lowest grain yield was at 4 seedlings hill-1 under continuous saturation as well as submerged condition Considering the water treatment, continuous submerged condition required higher amount of water (1410 mm) compared to saturated condition (1010). The percent reduction of total water requirement from submerged to saturated condition was 28.37%. Field water use efficiency was higher in saturated condition than that’s of submerged condition (4.57 kg ha-1 mm-1)

Keywords: Growth, Yeld, Boro rice, Water level, Seedling hill-1

Location: Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka,

Start Date: 00-01-2006

End Date: 00-06-2006

Program Area: Seed Technology

Commodity: Rice

Objectives:

1. To find out the effect of water level and seedling number hill-1 on growth and yield of boro rice

2. To identify the optimum water level and seedling(s)/hill for boro rice cultivation.

3 To find out the water use efficiency

Methodology:

The experiment was conducted in the Sher-e-Bangla Agricultural University farm, Dhaka during January to June 2006 to find out the influence of water level and seedling number hill-1 on growth and yield of boro rice.

Crop / planting material

BRRI Dhan 29, a high yielding variety of boro rice was used as a test crop.

Seed collection and

Experimental treatments

Two sets of treatments included in the experiment were as follows:

A. Irrigation water levels (2):

S1= Saturated (No deficit or stagnation of water)

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

T₄₌ 4 seedlings hill-1

Experimental design The experiment was laid in a split-plot design with three replications

Harvesting and post harvest operation Maturity of crop was determined when 90% of the grains become golden yellow in color.

Recording of data A.

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

Dry weight of plant at 30 days interval

Time of flowering

B. Yield contributing characters

Number of effective tillers hill-1

Number of ineffective tillers hill-1

Number of fertile spikelets (filled grains) panicle-1

Number of sterile spikelets (unfilled grains) panicle-1

Weight of 1000- grain (g)

C. Yield and water economy

Grain yield (t ha-1)

Straw yield (t ha-1)

Harvest index (%)

Amount of irrigation water

Field water use efficiency (WUE)

Analysis of data

The data collected on different parameters were statistically analyzed to obtain the level of significance using the IRRISTAT (Version 4.0, IRRI, Philippines) 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: M.S.Thisis, SEMESTER: JANUARY- JUNE, 2006, Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Results of the experiment showed that irrigation water levels had a significant influenced on growth characters but insignificant on yield contributing characters and yield. Interaction effect of water level and seedling number hill-1 had significant effect on growth as well as yield contributing characters except duration of flowering, effective tillers hill-1 and 1000 grain weight. Among the yield contributing characters total grains panicle-1, filled grains panicle-1 and percent filled grains were significantly lowest at saturated condition with 4 seedlings hill-1 compared to other treatments. Significantly the highest grain yield was recorded from 1 to 3 seedlings hill-1 irrespective of their water level and the lowest grain yield was at 4 seedlings hill-1 under continuous saturation as well as submerged condition Considering the water treatment, continuous submerged condition required higher amount of water (1410 mm) compared to saturated condition (1010). The percent reduction of total water requirement from submerged to saturated condition was 28.37%. Field water use efficiency was higher in saturated condition than that’s of submerged condition (4.57 kg ha-1 mm-1).

Knowledge Management: Thesis