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Yield Performance of Some Transplant Aman Rice Varieties as Influenced by Different Levels of Nitrogen

Dr. Swapan Kumar Pual
Assistant Professor
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

The experiment was carried out during the period of June to November 2013 at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh with a view to examine the yield performance of some transplant aman rice varieties as influenced by different levels of nitrogen. The experiment consisted of four varieties viz. BRRI dhan49, BRRI dhan52, BRRI dhan56, BRRI dhan57 and four levels of N viz. 0, 46, 60 and 75 kg ha^-1. The experiment was laid out in a randomized complete block design with three replications. Variety, levels of N and their interactions exerted significant influence on yield contributing characters and yield of transplant aman rice. Among the varieties, BRRI dhan52 produced the tallest plant (117.20 cm), highest number of effective tillers hill^-1 (11.28), grains panicle^-1 (121.5) and 1000-grain weight (23.65 g) whereas the lowest values of these parameters were produced by BRRI dhan57. Highest grain yield (5.69 t ha^-1) was obtained from BRRI dhan52 followed by BRRI dhan49 (5.15 t ha^-1) and the lowest one (4.25 t ha^-1) was obtained from BRRI dhan57. In case of N, the tallest plant (111.70 cm), highest number of total tillers hill^-1 (12.34), grains panicle^-1 (133.6), 1000-grain weight (24.55 g) and grain yield (5.64 t ha^-1) were obtained from 75 kg N ha^-1 and the lowest values were obtained from control. BRRI dhan52 fertilized with 75 kg N ha^-1showed best performance with respect to all the parameters studied. The overall results suggest that BRRI dhan52 should be fertilized with 75 kg N ha^-1for getting higher yield under the agro-climatic condition of BAU.

Keywords: Variety, Nitrogen, Yield, Transplant Aman rice

Location: Mymensingh

Start Date: 00-06-2013

End Date: 00-11-2013

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

To evaluate the yield performance of some transplant aman rice varieties as influenced by different levels of nitrogen.

Methodology:

The experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during June to November 2013 to study the yield performance of some transplant aman rice varieties as influenced by different levels of nitrogen. The experiment field was a medium high land having silty clay loam having pH 6.5. The experiment comprised four rice varieties viz. BRRI dhan49, BRRI dhan52, BRRI dhan56, BRRI dhan57 and four levels of N viz. 0, 46, 60 and 75 kg ha^-1. The experiment was laid out in a randomized complete block design with three replications. The size of unit plot was 4.0 m ´ 2.5 m. Before raising seeds in the nursery, seeds were water soaked for 24 hours and then taken out of water and packed in the gunny bags for sprouting. The seeds sprouted after 72 hours. For raising seedlings a piece of high land was selected. Sprouted seeds were sown in the nursery bed on 20 June 2013. Proper care was taken to raise seedlings in the nursery bed. Thirty days old seedlings were transplanted on 18 July 2013 in the main field with 3 seedlings hill^-1maintaining spacing at 25 cm ´ 15 cm. The experimental land was prepared by power tiller and cross ploughing with a country plough and leveled by laddering. Weeds and stubble of previous crop were removed from individual plots and finally plots were leveled properly. TSP, MoP, gypsum, and zinc sulphate were applied @ 600g, 480g, 360g and 60g in each plot during the final land preparation. Urea was applied as per treatment in three equal splits at 15, 30 and 45 days after transplanting (DAT). Other intercultural operations were done as and when required. Four hills were randomly selected (excluding boarder hills and central 1m ´ 1m) prior to harvest to record the data on crop characters and yield contributing characters. The crop of individual plots was separately harvested at full maturity. Data on plant height, number of total and effective tillers hill^-1, panicle length, number of total spikelets panicle^-1, number of grains panicle^-1, and weight of 1000-grain were collected from five sample plants of each plot. The grain and straw yield for each plot were recorded after proper threshing, cleaning and drying in sun. The collected data were statistically analyzed and mean differences were compared by Duncan’s New Multiple Range Test (DMRT) (Gomez and Gomez, 1984).

Source of Information: J. Bangladesh Agril. Univ. 12(2): 321–324, 2014

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The BRRI dhan52 should be fertilized with 75 kg N ha^-1for getting higher yield under the agro-climatic condition of BAU.

Knowledge Management: Journal