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Yield Performance of Four Transplant Aman Rice Varieties as Influenced by Npks Fertilization

N.C. Pal
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

M.A.R. Sarkar
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

S.C. Barman
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

M.A.M. Miah
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

This study was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh, during July to December 2006 to study the yield performance of four Transplant Aman (T. Aman) rice varieties as influenced by NPKS fertilization. The experiment consisted of four varieties of rice viz. BRRI dhan30, BRRI dhan31, BRRI dhan40 and BRRI dhan41; and four levels of fertilizers viz. zero level (control), low level of fertilizer (50% of the recommended dose of NPKS), recommended level of fertilizer (100% of the recommended dose of NPKS) and high level of fertilizer (150% of recommended dose of NPKS). The experiment was laid out in a split-plot design with three replications. Effect of variety was significant in respect of all growth and yield attributes except number of total tillers hill^-1, panicle length and 1000-grain weight. The highest grain yield (5.60 t ha^-1), highest straw yield (6.77 t ha^-1) and biological yield (12.36 t ha^-1) were obtained from BRRIdhan41. Effect of fertilizer was significant in respect of all growth characters and yield attributes except panicle length and 1000-grain weight. The highest grain yield (5.78 t ha^-1) was obtained in recommended level of fertilizer and the lowest yield (4.57 t ha^-1) was recorded in the control treatment. The significant interaction between variety and fertilizer level showed that the highest grain yield (6.29 t ha^-1) was achieved in the interaction of BRRI dhan41 and recommended level of fertilizer dose.

Keywords: Yield, Rice variety, NPKS fertilizer, T. Aman

Location: Agronomy Field Laboratory, BAU

Start Date: 00-06-2006

End Date: 00-12-2006

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To find out optimum rate of fertilizer to obtain satisfactory yield performance of Transplant Aman rice, particularly the high yield potential varieties.

Methodology:

The study was conducted at the Agronomy Field Laboratory, BAU (24⁰75′ N latitude and 90⁰50′ E longitude), Mymensingh, during the period from July to December 2006. The experimental treatment comprises four T. Aman rice varieties viz. BRRI dhan30, BRRI dhan31, BRRI dhan40 and BRRI dhan41; and four levels of fertilizer viz. zero level (control), low level of fertilizer (50% of the recommended dose of NPKS), recommended level of fertilizer (100% of the recommended dose of NPKS) and high level of fertilizer (150% of recommended dose of NPKS). The experiment was laid out in a split-plot design with three replications. The unit plot size was 4.0 m × 2.5 m. The experimental area was characterized by non-calcareous dark grey floodplain soil belonging to the Sonatola Soil Series under Old Brahmaputra Floodplain. The nutrients N, P, K, S and Zn were applied in the form of urea, triple super phosphate, muriate of potash, gypsum and zinc suplhate, respectively. The recommended doses of fertilizers were 220, 50, 60, 35 and 5 kg ha^-1 of urea, triple super phosphate, muriate of potash, gypsum and zinc sulphate, respectively. Among those fertilizers, zinc sulphate was applied equally in all plots (i.e. recommended dose of zinc sulphate) during the final land preparation. Other fertilizers were applied according to treatment specification. Urea was top dressed in three equal splits at 15, 30 and 45 days after transplanting (DAT) according to treatment specification. Thirty-day old seedlings were transplanted on 5 August 2006 at the rate of three seedlings hill^-1 maintaining a spacing of 25 cm × 15 cm. Intercultural operations were done as and when necessary. The crop was harvested at full maturity. A harvest area of 1 m × 1 m was selected in the middle portion of each unit plot. Grains were threshed, cleaned and sun-dried and the grain yield plot^-1 was recorded at 14% moisture content. Straws were sun-dried properly. Finally grain and straw yields plot^-1 were recorded and converted to t ha^-1. Data were recorded on plant height, number of total tillers hill^-1, number of effective tillers hill^-1, number of grains panicle^-1, grain yield and straw yield. The recorded data were compiled and tabulated for statistical analysis. Analysis of variance was done with the help of computer package MSTAT. The mean differences among the treatments were adjudged with Duncan’s Multiple Range Test.

Source of Information: J. Agrofor. Environ. 2(2): 39-42, 2008; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Effect of variety was significant in respect of all growth and yield attributes except number of total tillers hill^-1, panicle length and 1000-grain weight. The highest grain yield (5.60 t ha^-1), highest straw yield (6.77 t ha^-1) and biological yield (12.36 t ha^-1) were obtained from BRRI dhan41. Effect of fertilizer was significant in respect of all growth characters and yield attributes except panicle length and 1000-grain weight. The highest grain yield (5.78 t ha^-1) was obtained in recommended level of fertilizer and the lowest yield (4.57 t ha^-1) was recorded in the control treatment. The significant interaction between variety and fertilizer level showed that the highest grain yield (6.29 t ha^-1) was achieved in the interaction of BRRI dhan41 and recommended level of fertilizer dose.

Knowledge Management: Journal