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Effect of Split Application of Nitrogen Fertilizer on Boo Rice Genotypes

Md. Saiful Islam
Former MS Student
Department of Crop Botany, BAU, Mymensingh

Dr. Md. Tariqul Islam
Principal Scientific Officer and Head
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Dr. A. K. M. Azad-ud-dhula Prodhan
Professor
Department of Crop Botany, BAU, Mymensingh

Abstract/ Executive Summary:

An experiment was carried out in pots at Bangladesh Institute of Nuclear Agriculture, Mymensingh, during 23 December, 2002 to 25 May, 2003 to assess the effect of four nitrogen levels viz., T₁ (full doze of urea i.e. 215 kg urea ha^-1, at one split, at 15 DAT), T₂(full doze of urea at two equal splits, ½ at 15 DAT + ½ 30 DAT), T₃₍full doze of urea at two equal splits, ½ at 15 DAT + ½ 55 DAT) and T₄ (full doze of urea at three equal splits, ½ at 15 DAT + ½ 30 DAT + ½ at 55 DAT) on growth, yield and yield attributes of boro rice genotypes viz. V₁ (Binadhan-5), V₂(Tainan-3) and V₃(Binahdan-6). Almost all the parameters showed the highest values when the plants were treated with T₄ and the lowest in T₁. Binadhan-5 and Binadhan-6 showed similar performance in respect of most of the parameters but Binadhan-6 produced the highest grain yield and biological yield. Full dose of urea (215 kg urea ha^-1) applied at three equal split at 15, 30 and 55 DAT was found to be the most beneficial one for the rice genotypes.

Keywords: Nitrogen, Rice, Yield

Location: Pots at Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh

Start Date: 23-12-2002

End Date: 25-05-2003

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The objective of the study was to find out proper split application of urea fertilizer for optimum growth and yield of boro rice.

Methodology:

An experiment was carried out in pots at Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, during the period from 23 December, 2002 to 25 May, 2003 to assess the effect of four nitrogen levels viz., T₁ (full doze of urea i.e. 215 kg urea ha^-1, at one split, at 15 DAT), T₂(full doze of urea at two equal splits, ½ at 15 DAT + ½ 30 DAT), T₃₍full doze of urea at two equal splits, ½ at 15 DAT + ½ 55 DAT) and T₄ (full doze of urea at three equal splits, ½ at 15 DAT + ½ 30 DAT + ½ at 55 DAT) on growth, yield and yield attributes of boro rice genotypes viz. V₁ (Binadhan-5), V₂(Tainan-3) and V₃(Binahdan-6). The experiment was laid out in Randomized Complete Block Design. Each pot contained 7 kg of soils collected from BINA farm. Fertilizers were applied in the experimental pots at the rate of 180, 100 and 20 kg ha^-1 in the form of triple super phosphate, muriate of potash and gypsum, respectively. Three 45 day-old seedlings were transplanted in each pot on 6 February 2003. The plants were harvested three times, at 65, 90 days after transplanting and maturity stags of the rice. Data on morphological, yield attributes and yield were recorded. Analysis of variance was done according to the design with the help of computer package MSTAT-C (Russell, 1986). The mean difference among the treatment was tested with Duncan’s Multiple Range Test (Gomez and Gomez, 1984).

Source of Information: MS thesis by MD. SAIFUL ISLAM, Examination Roll No. 03AgCBot.JJ41M, Reg. No. 22824, Jnuary-June Semester, 2004, Department of Crop Botany, BAU, Mymensingh

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Plant height, number of tillers hill^-1, number of leaves hill^-1,leaf area hill^-1,(cm²), DM (dry matter) of root, stem and leaves hill^-1, TDM (total dry matter) hill^-1, chlorophyll content in leaves (at 74 DAT), number of panicle hill^-1,length of panicle, number of filled grain panicle^-1, 1000-grain weight, grain yield hill^-1, biological yield hill^-1, and harvest index of rice genotypes were increased over the T₁. All the above parameters showed the highest values when the plants were treated with T₄ and the lowest in T₁. Among the genotypes, Binadhan-5 and Binadhan-6 showed similar performance in respect of most of the parameters but Binadhan-6 produced the highest grain yield and biological yield. Among the treatments, T₄ showed the best performance. Tainan-3 showed the least values, in respect of most of the parameters when compared to Binadhan-5 and Binadhan-6. Full dose of urea (215 kg urea ha^-1) applied at three equal split at 15, 30 and 55 DAT was found to be the most beneficial one for the rice genotypes.

Knowledge Management: Thesis