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Effect of Plant Spacing and N Level on the Yield Performance of T. Aman Rice

Md. Abubakar Siddique
Scientific Officer
Genetic Resources and Seed Division (GRSD), BRRI, Gazipur

Nazrul Islam
Professor
Agronomy Department, BAU, Mymensingh

Hasina Begum
Scientific Officer
Genetic Resources and Seed Division (GRSD), BRRI, Gazipur

Armin Bhuiya
Scientific Officer
Genetic Resources and Seed Division (GRSD), BRRI, Gazipur

MAA Mamun
Scientific Officer
Agronomy Division, BRRI, Gazipur

Abstract/ Executive Summary:

An experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during July to December 2007 to observe the effect of plant spacing and nitrogen level on the yield performance of transplant aman rice cv. Surjomoni. Four spacing, 25 × 10, 25 × 15, 25 × 20 and 30 × 20 cm were compared at five nitrogen levels ., 0, 45, 90, 135 and 180 kg N ha^-1 in randomized complete block design. The highest number of grains panicle^-1 (142.59), grain yield (6.58 tha^-1) and straw yield (9.62 tha^-1) were recorded from the 25 × 15 cm spacing with 90 kg N ha^-1. The highest number of tillers m^-2 (357.6) and panicle m^-2(248) were obtained from 25 × 10 cm spacing with 90 kg N ha^-1. The highest harvest index (45.95%) was recorded from 25 × 15 cm spacing with 0 kg N ha^-1. The longest panicle (29.41 cm) was obtained from 25 × 10 cm spacing with 135 kg N ha^-1 which was similar to that of 30× 20 cm spacing with 90 kg N ha^-1. Rice yield responded quadratically to N application. The calculated maximum N doses were 109, 103, 115 and 116 kg ha^-1for 25 ×10, 25 ×15, 25 ×20 and 30 ×20 cm spacing, respectively and the calculated optimum N doses were 104, 99, 106 and 112 kg ha^-1for 25 ×10, 25 ×15, 25 ×20 and 30 ×20 cm spacing, respectively.

Keywords: Spacing, Nitrogen level, Yield, Surjomoni, Transplant aman

Location: Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 01-07-2007

End Date: 30-12-2007

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To observe the effect of plant spacing and nitrogen level on the yield performance of transplant aman rice cv. Surjomoni.

Methodology:

The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during aman season, 2007. The treatments were four plant spacing namely, 25 × 10 cm (S₁), 25 × 15 cm (S₂), 25 × 20 cm (S₃) and 30 × 20 cm (S₄) and five nitrogen levels, 0 (N₀), 45 (N₁), 90 (N₂), 135 (N₃) and 180 kg N ha^-1(N₄). The 5 ×4 factorial experiment was laid out in a randomized complete block (RCB) design, each treatment had three replications. The unit plot size was 5 m² (2.5 m × 2.0 m) and the space between the blocks and unit plots were 1.0 m and 0.75 m, respectively. At the time of final land preparation 80 kg triple supper phosphate (TSP), 120 kg muriate of potash (MP), 55 kg gypsum and 10 kg zinc sulphate per ha were applied . Nitrogen from urea was top dressed in three equal splits at 15, 30 and 45 days after transplanting(DAT) as per specification of the treatments. Thirty- day- old seedlings were transplanted at the rate of 2-3 seedlings hill^-1on the well puddle plots on 6^th August 2007 maintaining four different spacing as per experimental specification. Appropriate plant protection measures and cultural management practices were followed throughout the growing period. Five hills in each plot excluding border rows were randomly selected and tagged prior to harvesting for collection of data on plant characters, grain yield and yield components. The grain yield was adjusted to 14% moisture content. Data on yield components were collected from the sample plants of each plot. Data for different parameters were compiled and tabulated in appropriate form for statistical analysis. The maximum (N_max) and the economic optimum (N_opt) amount of N required to produce rice grain was calculated as N_max= -b/2c and N_opt =1/2c(P_f/P_y-b) (Gomez and Gomez, 1984) where, P_fand P_y are prices of applied N kg^-1 and rice grain t^-1($0.38 and 200, respectively) and b and c are the estimates of the regression co-efficients in y=a+bN+cN², the form of the observed relationship between grain yield and applied N. Data were analyzed using the analysis of variance (ANOVA) technique and the mean differences among the treatments were adjudged with Duncan’s Multiple Range test using a computer package program MSTAT-C.

Source of Information: Eco-friendly Journal of Agriculture, ISSN:1999-7957, Volume: 2, Issue: 6, Pages:637-640, Year: June, 2009

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The study reveals that the maximum N doses for the maximum grain yield of Surjomoni rice variety are 109, 103, 115 and 116 kg ha^-1for 25 ×10, 25 ×15, 25 ×20 and 30 ×20 cm spacing, respectively and the optimum N doses are 104, 99, 106 and 112 kg ha^-1for 25 ×10, 25 ×15, 25 ×20 and 30 ×20 cm spacing, respectively.

Knowledge Management: Journal