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Effect of Number of Seedlings Hill-1 on the Yield and Yield Contributing Characters of Short Duration Aman Rice Cultivars

T Islam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

MA Salam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh during the period from July to October 2016 to study the effect of age of seedling on the yield and yield contributing characters of short duration Aman rice cultivars. The study consisted two factor A: Variety- three- i) BINA dhan7 (V₁), (ii) BRRI dhan56 (V₂) and ( iii) BRRI dhan62 (V₃); and factor B: Number of seedlings hill^- 1 (i) Single seedling hill^-1 (S₁), (ii) Two seedlings hill^-1 (S₂) and (iii) Three seedlings hill^-1 (S₃). The experiment was laid out in a randomized complete block design with three replications. The highest grain yield was obtained from the cultivar BINA dhan7 which was statistically identical with BRRI dhan56 and this was the consequences of higher number of total and effective tillers hiil^-1 and highest number of grains panicle^-1. Grain yield was not significantly affected by the number of seedlings hill^-1 but numerically the highest grain yield was recorded from single seedling hill^-1. From the interaction it is observed that grain yield was not significantly affected by the interaction of cultivar and number of seedlings hill^-1. But numerically the highest grain yield was recorded from the interaction of BRRI dhan56 × single seedling hill^-1. From the economic analysis it is observed that the highest BCR (1.64) was recorded from single seedling hill^-1 in BRRI dhan56 which was close to single seedling hill^-1 in BINA dhan7 and the lowest BCR (103) was obtained from two seedlings hill^-1 in BRRI dhan62. From the results of the study it may be concluded that BRRI dhan56 with single seedling hill^-1 might be cultivated in AEZ-9 for obtaining higher yield and higher economic return in Aman season.

Keywords: Weed control, T. Aman, BRRI Dhan 32, Rice

Location: Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh

Start Date: 00-07-2016

End Date: 00-10-2016

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To see the effect of number of seedlings hill^-1 on the yield and yield contributing characters of short duration Aman rice cultivars.

Methodology:

The experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh during the period from July to October 2016 to study the effect of number of seedlings hill^-1 on the yield and yield contributing characters of short duration Aman rice cultivars. The experimental site belongs to the Sonatola soil series under the Old Brahmaputra Floodplain Agro-ecological zone (AEZ-9) having non-calcareous dark grey floodplain soil. (UNDP and FAO, 1988). The study consisted of two factor A: Variety- three- i) BINA dhan7 (V₁), (ii) BRRI dhan56 (V₂), and ( iii) BRRI dhan62 (V₃) and factor B: Number of seedlings hill^-1 (i) Single seedling hill^-1 (S₁), (ii) Two seedlings hill^-1 (S₂) and (iii) Three seedlings hill^-1 (S₃). The experiment was laid out in a randomized complete block design with three replications. Each of the replication represented a block in the experiment. Each block was divided into 9 unit plots where 9 treatment combinations were allocated at random. There were 27 plots in the experiment. The size of unit plot was 4.0 m × 2.5 m. The distance maintained between two unit plots was 0.75 m and between blocks was 1 m. Treatments were randomly allocated in the experiment. Seeds were immersed in water in bucket for 24 hours. Then seeds were taken out of water and kept thickly in gunny bags. The seeds sprouted after 48 hours. Then the sprouted seeds were sown in the nursery bed on 24 June 2016. The field layout was made on 22 July 2016. In the experiment, full doses of fertilizers viz., triple super phosphate (120 kg ha^-1), muriate of potash (70 kg ha^-1), gypsum (60 kg ha^-1) and zinc sulphate (10 kg ha^-1) were applied at the time of final land preparation. Urea (165 kg ha^-1) was top dressed in three equal installments at 7, 21 and 36 DATs. Thirty-day-old seedlings were uprooted carefully from the nursery bed and transplanted on 24 July 2016 at the rate of single , two and three seedlings hill^-1 (as per treatment) maintaining a spacing of 25 cm × 15 cm. Three weeding were done in order to keep the crop weed free at 15, 30 and 45 DAT. Irrigation was applied as and when necessary. Days of 90% maturity was counted when 90% spikelets of all the rice varieties become matured enough to harvest from randomly selected five hills. The crops were harvested on 13 October 2016 (BINA dhan7 and BRRI dhan62) (80 DAT) and 23 October 2016 (BRRI dhan56) (90 DAT). In each plot central 1 m × 1 m area was harvested to record the yields of grain and straw. Five hills were randomly selected for measuring the data on yield contributing characters. The harvested crop of each plot was separately bundled, properly tagged and then brought to the threshing floor. The harvested crops were threshed by pedal thresher and the fresh weights of grain and straw were recorded plot-wise. Grains were cleaned and dried to a moisture content of 14%. Straws were sun dried properly. Final grain and straw yields plot^-1 were recorded and converted to t ha^-1. Data were collected on plant height, total tillers hill^-1, effective tillers hill^-1, length of panicle, grains panicle^-1, 1000-grain weight, grain yield, straw yield and harvest index. Collected data were analyzed using “Analysis of Variance Technique” with the help of a computer package programmes MSTAT and the mean differences were adjudged by Duncan’s Multiple Range Test (Gomez and Gomez, 1984).

Source of Information: Progressive Agriculture 28 (4): 279-286, 2017

Article Link (Online Journal): DOI: https://doi.org/10.3329/pa.v28i4.36367

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the results of the study it may be concluded that BRRI dhan56 with single seedlings hill^-1 might be cultivated in AEZ-9 for obtaining higher yield and higher economic return in aman season.

Knowledge Management: Journal