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Effect of Variety and Nitrogen Rate on the Yield Performance of Boro Rice

SG Chamely
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

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

MA Kader
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

MG Rabbani
Introduction Research Cell, Noakhali Science & Technology University, Sonapur, Noakhali-3814, Bangladesh.

N Islam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

S Hoshain
Department of Coastal Agriculture, Noakhali Science & Technology University, Sonapur, Noakhali-3814, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from November 2010 to May 2011 to study the effect of variety and rate of nitrogen on the performance of Boro rice. The experiment comprised three varieties viz., BRRI dhan28 (V1), BRRI dhan29 (V2) and BRRI dhan45 (V3); and five rates of nitrogen viz., control (N₀), 50 kg (N₁), 100 kg (N₂), 150 kg (N₃) and 200 kg (N₄) N ha^-1. The experiment was laid out in a randomized complete block design with four replications. The growth analysis results indicate that the tallest plant (80.88 cm) and the highest number of total tillers hill^-1 (13.80) were observed in BRRI dhan29 at 70 DATs and the highest total dry matter (66.41 g m^-2) was observed in BRRI dhan45. The shortest plant (78.15 cm) and the lowest number of tillers hill^-1 (12.41) were recorded from BRRI dhan45 and the lowest dry matter (61.24 g) was observed in BRRI dhan29. The tallest plants (84.01 cm), highest number of tillers hill^-1 (14.06) and the highest dry matter (69.58 g m^-2) were obtained from 200 kg N ha^-1. The tallest plants (86.48 cm) and maximum dry matter (72.30 g m^-2) were recorded from BRRI dhan28 with 200 kg N ha^-1 and BRRI dhan45 with 200 kg N ha^-1, respectively. The highest number of tillers hill^-1 (15.14) was obtained from BRRI dhan29 with 50 kg N ha^-1. The harvest data reveal that variety had significant effect on total tillers hill-1, effective tillers hill^-1, non-effective tillers hill^-1, panicle length, grain yield, straw yield and harvest index. The highest grain yield (4.84 t ha^-1) was recorded from BRRI dhan29. The results of the experiment also indicate that total tillers hill^-1, effective tillers hill^-1, grains panicle^-1, sterile spikelets panicle^-1, grain yield, straw yield and harvest index were significantly affected by levels of nitrogen, while plant height, panicle length, 1000-grain weight were not significantly affected by levels of nitrogen. The highest grain yield (5.58 t ha^-1) was obtained from 200 kg N ha^-1. Interaction effect of variety × 200 kg N ha-1 produced the highest grain yield (5.82 t ha^-1). From the results of the study it may be concluded that BRRI dhan29 rice may be cultivated with 200 kg N ha^-1 for obtaining higher yield in AEZ 9 of Bangladesh.

Keywords: Boro rice, N level, Variety, Yield

Location: Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-11-2010

End Date: 00-05-2011

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Rice

Objectives:

1.To observe the varietal performance of Boro rice,

2.To evaluate the effect of rate of nitrogen on the yield of Boro rice

3. To find out the interaction effect of variety and nitrogen rate, if any, on the yield of Boro rice.

Methodology:

The experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh during the period from November 2010 to May 2011 to study the effect of variety and nitrogen rate on the growth and yield performance of Boro rice. 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. Soil of the experimental site was more or less neutral in reaction, low in organic matter content and its general fertility level was also low. The study consisted of two factor A: Variety- three- i) BRRI dhan28 (V₁), (ii) BRRI dhan29 (V₂), and ( iii) BRRI dhan45 (V₃); and factor B: Level of nitrogen- (i) 0 or control treatment (N₀), (ii) 50 (N₁), (iii) 100 (N₂), 150 (N₃) and 200 (N₄) kg nitrogen ha^-1. The experiment was laid out in a randomized complete block design with four replications. Each of the replication represented a block in the experiment. Each block was divided into 15 unit plots where 15 treatment combinations were allocated at random. There were 60 plots in the experiment. The size of unit plot was 4.0 m × 2.5 m. The distance maintained between two unit plots was 0.50 m and between blocks was 1 m. Treatments were randomly allocated in the experiment. The land was puddled thoroughly by repeated ploughing and cross ploughing with a country plough and subsequently leveled by laddering. The field layout was made on 5 January 2011. 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 (0, 50, 100, 150 and 200 kg ha^-1 Rice transplanting ) was top dressed in equal installments at 15, 30 and 45 DAT. Thirty five-day-old seedlings were uprooted carefully from the nursery bed and transplanted on 5 January 2011 at the rate of three seedlings hill-1 Data collection maintaining a spacing of 25 cm × 15 cm. Three weedings were done in order to keep the crop weed free at 15, 30 and 45 DAT. Three hills (excluding border hill) were selected at random from each plot and tagged for measuring plant height and counting the number of tillers at 25, 40, 55 and 70 DAT. Maturity of the crop was determined when 90% of the seeds become golden yellow in color. The crops were harvested at full maturity on 17 April 2011 (BRRI dhan28), 28 April 2011 (BRRI dhan45) and 8 May 2011 (BRRI dhan29). In each plot central 1 m × 1 m area was harvested to record the yields of grain and straw. Three hills that are randomly selected for measuring growth parameters were used to record 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 weight of grain and straw was 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. At vegetative stage data were collected on plant height, total tillers hill-1 and total dry matter (g m^-2). To determine dry matter the sample plants were first air dried for 6-8 hours. Then the samples were packed in labeled brown paper bag and dried in the oven at 85±50 Statistical analysis C for 24 hours until constant weight was reached. After oven drying, the samples were weighed by using electric balance. Collected data were compiled and tabulated in proper form for statistical analysis. The recorded data in variation plant characters were statistically analyzed to find out the significance of variation resulting from the experimental treatments. At harvest, data were collected on plant height, total tillers hill^-1, effective tillers hill^-1, non effective tillers hill^-1, length of panicle, grains panicle^-1, sterile spikelets 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.

Source of Information: Progressive Agriculture 26 (1): 6-14, 2015, ISSN: 1017 - 8139

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the results of the study it may be concluded that BRRI dhan29 rice may be cultivated with 200 kg N ha^-1 References for obtaining higher yield in AEZ 9 of Bangladesh.

Knowledge Management: Journal