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Effect of Nitrogen Application on Green Leaf Production and Seed Quality of BRRI Dhan30

M.A.I. Khan
Controller of Examination Section, BAU

M. Ahmed
Department of Agronomy, BAU

N.C. Sutradhar
Padakhep Manabik Unnayan Kendra

Z. Alam
Establishment Section, BAU, Mymensingh

M.E. Haque
Department of Agriculture Extension, Khamarbari,

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh and Crop Physiology Departmental Laboratory, Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh during June, 2002 to April, 2003 to investigate the effect of nitrogen application on green leaf production and seed quality of BRRI dhan 30. The split plot experiment included three different nitrogen application levels viz. low level of nitrogen @ 20 kg ha^-1 (N₁), standard level of nitrogen @ 40 kg ha^-1 (N₂) and high level of nitrogen @ 60 kg ha^-1 (N₃). The result revealed that yield and yield contributing characters decreased considerably by different levels of nitrogen application. Plant height at harvest, effective tillers hill^-1, seeds panicle^-1, seed yield, straw yield and harvest index were significantly highest obtained with the highest level of nitrogen (N₃). The shortest plant height and the lowest number of seed panicle^-1 were produced with the lowest level of nitrogen (N₁). Weight of 1000 seeds, green and dry leaf production varied significantly but vigour index, protein content (%) was not significantly affected by different levels of nitrogen. The highest production of green leaves 4.22 t ha^-1 and grain yield 4.04 t ha^-1 was produced by the application of highest level of nitrogen @ 60 kg ha^-1 (N₃).

Keywords: Nitrogen application, Green leaf, Seed quality and BRRI dhan30

Location: Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh and Crop Physiology Departmental Laboratory, Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh

Start Date: 00-06-2002

End Date: 00-04-2003

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To determine the standard levels of nitrogen fertilizer on green leaf production, yield and yield contributing characters and quality of seeds of transplanted aman rice and to find out the possibility of using green leaves as animal fodder.

Methodology:

The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University (BAU), Mymensingh and Crop Physiology Departmental Laboratory, Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh during June, 2002 to April, 2003 to investigate the effect of nitrogen application on green leaf production and seed quality of BRRI dhan 30. The split plot experiment included three different nitrogen application levels viz. low level of nitrogen @ 20 kg ha^-1 (N₁), standard level of nitrogen @ 40 kg ha^-1 (N₂) and high level of nitrogen @ 60 kg ha^-1 (N₃). The experimental field was a medium high, well drained; silt loam soil belongs to the Sonatala soil series under Old Brahmaputra Floodplain (AEZ-9). The land was fertilized with 20, 35, 11 and 2.3 kg ha^-1 in the form of triple super phosphate, muriate of potash, gypsum and zinc sulphate respectively. Whole amount of all fertilizers excluding urea was applied at the time of final land preparation. Urea was equally top dressed at 15, 30 and 45 days after transplanting (DAT). Thirty days old seedlings were transplanted maintaining three seedlings hill^-1 with 25x15cm spacing. Intercultural operations were applied when necessary. Five hills (excluding border hills) from each plot were randomly selected and tagged just after transplanting for measuring necessary data at 15 days intervals beginning from 30 DAT and continued up to 90 DAT. Before harvesting 5 prefix hills were uprooted and properly tagged for recording of necessary data. After harvesting, threshing and drying data of each plot were also recorded separately from crop of each plot. The recorded data were compiled, tabulated and adjusted the mean differences among the treatment as per Duncan’s Multiple Range Test (DMRT).

Source of Information: J. Agrofor. Environ. 3 (2): 39-42, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It may be concluded that during aman season when entire fields of Bangladesh is covered by transplant aman rice as well as severe crisis for want of green leaf and straw prevail for our livestock, it is possible to obtain 4.22 t ha^-1 green leaf and grain yield 4.04 t ha^-1 and also better seed quality from transplanted aman rice cv. BRRI dhan30 from the application of nitrogen @ 60 kg ha^-1.

Knowledge Management: Journal