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Effect of Nitrogen and Transplanting Date on Yield and Yield Components of Aromatic Rice

M.S. Islam
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.A. Hossain
Department of Biochemistry, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.A.H. Chowdhury
Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.A. Hannan
Department of Biochemistry, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted to find out the effect of nitrogen levels and transplanting dates on the yield and yield components of aromatic rice cv. Kalizira. The experiment was laid out in a randomized complete block design with three replications using four( 0, 50, 100, and 150 kg N ha^-1 ) levels of nitrogen and three transplanting dates (10 August, 22 August and 04 September, 2007 ) along with the basal doses of triple super phosphate (TSP), muriate of potash (MoP) and gypsum. The study revealed that most of the yield and yield contributing characters with few exceptions were significantly influenced by nitrogen levels and transplanting dates. They had significant positive effect on tillers hill^-1, tillers hill^-1, grains panicle^-1 and straw yield. The highest grain yield (2.63 t ha^-1) was observed in 100 kg N ha^-1 with 10 August transplanting treatment and straw yield (6.43 t ha^-1) was found highest in 150 kg N ha^-1 with same date of transplanting and the lowest grain (1.83 t ha^-1) and straw yields (5.14 t ha^-1) were found in N control treatment with transplanting date of 04 September. The highest grain length (4.68 mm), grain breadth (2.49 mm) and imbibition ratio (6.93) were observed with 100 kg ha^-1 N rate coupled with 10 August transplanting, and for length-breadth ratio, the same rate recorded the highest result, but with different transplanting date i.e. 22 August.

Keywords: Aromatic rice, Kalizira, Nitrogen, Transplanting date

Location: Main farm of Bangladesh Agricultural University, Mymensingh

Start Date: 00-08-2007

End Date: 00-11-2007

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To determine the optimum dose of nitrogen and the proper date of transplanting for obtaining satisfactory yield of Kalizira variety of aromatic rice.

Methodology:

The field experiment was conducted in the main farm of Bangladesh Agricultural University, Mymensingh. Chemical analyses of the initial soil sample of the experimental plots showed that the basic soil properties like pH, organic matter, total N, exchangeable K, Mg, P and available S were 6.49, 1.30 %, 0.11 %, 0.06 cmol kg-1, 2.29 cmol kg^-1, 12.1 μg g^-1 and 9.29 μg g^-1 soil respectively. The experiment was laid out in a randomized complete block design with three replications. There were four levels of nitrogen viz. 0, 50, 100, and 150 kg N ha^-1and three dates of transplanting viz. 10 August, 22 August and 04 September, 2007. Basal doses of TSP, MoP and gypsum were applied during land preparation. The unit plot size was 4 m × 2.5 m. Thirty day old seedlings of aman rice cv. Kalizira were transplanted on 10 August, 22 August and 04 September with a spacing of 15 cm from hill to hill and 25 cm from row to row. Intercultural operations like irrigation, weeding, and insect pest control were performed whenever required. The crop was harvested after 103 days of transplantation at full maturity. Plot-wise yield and yield attributes were recorded. All data were statistically analyzed using the MSTATC. Duncan’s Multiple Range Test (DMRT) was used to compare the treatments means.

Source of Information: J. Bangladesh Agril. Univ. 6(2): 291–296, 2008; ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It may be concluded that yield and yield attributing characters of aromatic rice were found to vary significantly at moderate dose of i.e. 100 Kg N ha^-1and at date (10 August). The reason might be that the interaction of N and transplanting date was synergistic at the moderate dose but antagonistic at higher dose.

Knowledge Management: Journal