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Response of BRRI Dhan31 to Nitrogen Level and Split Application of Sesbania Aculeata as Green Manure

M,M. Rahman
Department of Agronomy Hajee Mohammad Danesh Science and Technology University Dinajpur

M.S.U. Bhuiya
Professor
Department of Agronomy, BAU, Mymensingh

M.A. Islam
Department of Agronomy Hajee Mohammad Danesh Science and Technology University Dinajpur

M.S.I.Sikdar
Department of Agronomy Hajee Mohammad Danesh Science and Technology University Dinajpur

M.S.lslam
Department of Agronomy Hajee Mohammad Danesh Science and Technology University Dinajpur

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to investigate into the effect of nitrogen level and split application of Sesbania aculeata as green manure on the performance of transplant aman rice cv. BRRI dhan31. The experiment comprised of five levels of nitrogen levels viz., 0, 25, 50, 75 and 100 kg N/ ha and split application of Sesbania aculeata biomass viz., control, 100% as basal, 50% as basal + 50% at early tillering. 33% as basal + 33% at early tillering + 33% at panicle initiation, 100% at early tillering and 100% at panicle initiation the high level of N i.e. (25 t/ ha), Effect of nitrogen level was found significant for most of yield contributing characters (except 1000- grain weight) grain and straw yield. The highest level of nitogen (100 kg/ ha) produced both the highest grain (5.58 t/ ha) and straw (6.82 t/ ha) yield. On the other hand split application of Sesbania aculeata also significantly influenced most of parameters studied producing the highest grain yield (5.43 t/ ha) and straw yield (6.76 t /ha) when applied 100% as basal. Nitrogen @ 100 kg/ ha interacted favourably with Sesbania aculeata applied 100% as basal to produce the highest grain yield (6.22 t /ha), On the other hand, the control combination (no nitrogen and no Sesbania aculeata) produced the lowest grain yield (4.01 t/ ha). Results suggest that BRRI dhan31 may be fertilized and 100 kg N/ ha along with the application of 25 t/ ha fresh biomass of Sesbania aculeata as basal for higher yield.

Keywords: Nitrogen, Split application, Sesbania aculeata , Rice.

Location: Mymensingh

Start Date: 01-05-2004

End Date: 30-11-2004

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The present study was, therefore, undertaken to find out the effect of N level and split application of Sesbania aculeata on the performance of transplant aman rice cv. BRRI dhan 31.

Methodology:

The experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from May to November 2004. The experimental area was characterized by non-calcareous dark grey floodplain soil belonging to the Old Brahmaputra floodplain; Agro-ecological Zone 9 (UNDP and FAO, 1988). The experimental field was slightly loam in texture with a pH value of 6.8 and having 0.10 % and 1.78 % total nitrogen and organic matter, respectively. The experiment consisted of five levels of nitrogen viz., 0 (No), 25 (N₁), 50 (N₂), 75 (N₃) and 100 (N₄) kg N/ ha and split application of Sesbania aculeata biomass viz., no application (GMo), 100% as basal (GM₁), 50% as basal + 50% at early tillering (GM₂), 33% as basal + 33% at early tillering + 33% at panicle initiation (GM₃), 100% at early tillering (GM₄) and 100% at panicle initiation (GM₅) stage @ 25 t/ ha. The experiment was laid out in a split plot design with three replications.The crop was harvested when 90% of the grains became golden yellow in colour. The grains were threshed, cleaned and sun dried to record grain yield /plot. The grain yield was adjusted to 14% moisture content. Straw were sun-dried to record the straw yield/ plot. Grain and straw yields were then converted to t/ ha. The recorded data were analysed using Analysis of Variance with the help of computer package MSTAT. The mean differences among the treatments were adjudged with Duncan's Multiple Range Test (Gomez and Gomez, 1984).

Source of Information: Bangladesh j, crop sci. 2006, 17 (1): 35-40

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Interaction of nitrogen level and split application of Sesbania aculeata significantly influenced the production of number of total tillers/ hill, number of effective tillers/ hill, number of grains/ panicle, number of sterile spikeletes/ panicle, grain yield and straw yield. The highest straw yield was recorded from the treatment combination of 100 kg N/ ha and GM₂ (50% applied as basal and 50% applied at early tillering stage), which was statistically similar with the treatment combination of 100 kg N/ ha and GM₁(whole amount of S. aculeata applied as basal). The highest grain yield (6.22 t /ha) was achieved from the treatment combination of 100 kg N/ ha with GM₁ (whole amount of S. aculeata applied as basal), which was statistically identical with the treatment combination of 100 kg N /ha and GM₂ (50% applied as basal and 50% applied at early tillering stage) and the lowest grain yield (4.01 t /ha) was observed with control treatment (no application of nitrogen and S. aculeata). From the result of the present study, it may be concluded that 100 kg N/ ha with 100% basal incorporation of S. aculeata (25 t/ ha) appears to be the best combination for better yield of transplant aman rice.

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