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Integrated Nutrient Management for Fine Rice Following System of Rice Intensification (sri) Technique

M.N. Ahsan
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202.

M.P. Anwar
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202.

M.S.H. Bir
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202.

M.A.R. Sarkar
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202.

Abstract/ Executive Summary:

A field experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during July-December 2006 to evaluate the performance of some fine rice varieties under different nutrient management practices following System of Rice Intensification (SRI) technique. There were six fine rice varieties viz., BRRI dhan34, BRRI dhan38, Kalizira, Basmati, Kataribhog and Chiniguda and five different nutrient managements viz., i) Recommended fertilizer (RF), ii) 150% RF, iii) 15 ton cowdung ha^-1and iv) RF + 5 ton cowdung ha^-1, v) 50% RF + 10 ton cowdung ha^-1. The experiment was conducted in a randomized complete block design with three replications. BRRI dhan34 produced the highest grain yield (2.99 t ha-1), which was statistically identical to BRRI dhan38 (2.80 t ha^-1). Kalizira produced the lowest yield (1.99 t ha^-1). The highest grain yield (2.76 t ha^-1) was obtained from RF + 5 ton cowdung ha^-1 and the lowest (1.36 t ha^-1) was recorded from 15 ton cowdung ha^-1. BRRI dhan34 grown with RF (3.48 t ha^-1) or 150% RF (3.45 t ha^-1) or RF + 5 t cowdung ha^-1 (2.98 t ha^-1), BRRI dhan38 grown with RF (3.48 t ha^-1) or 150% RF (3.14 t ha^-1) and Basmati grown with RF + 5 t cowdung ha^-1 (3.08 t ha^-1) or 50% RF + 10 t cowdung ha-1 (3.15 t ha^-1) produced identical but highest grain yield.

Keywords: Variety, Nutrient management, Grain yield, Fine rice

Location: Agronomy Field Laboratory, Bangladesh Agricultural University

Start Date: 00-06-2006

End Date: 00-12-2006

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To see the effects of combination of cowdung with NPKS fertilizers for fine rice following the technique of system of rice intensification in transplant aman season.

Methodology:

The experimental field was a medium high land with silt loam texture. Soil pH, organic matter, total nitrogen, available sulphur, available phosphorus and exchangeable potassium content of the experimental soil were 6.50, 1.29%, 0.10%, 14.20 ppm, 16.72 ppm and 0.12me100g^-1 soil, respectively. The experiment consisted of two factors (a) fine rice varieties viz., BRRI dhan34, BRRI dhan38, Kalizira, Basmati, Kataribhog and Chiniguda and (b) integrated nutrient managements viz., recommended fertilizer (RF); 150% RF; 15 ton cowdung ha^-1; RF + 5 ton cowdung ha^-1 and 50% RF + 10 ton cowdung ha^-1. The experiment was laid out in a randomized complete block design with three replications. The unit plot size was 10 m2 (4.0 m × 2.5 m). The recommended fertilizers were applied though urea, triple superphosphate, muriate of potash, gypsum and zinc sulphate @ 180, 100, 70, 60 and 10 kg ha^-1, respectively. Except urea, all the chemical fertilizers were applied before final land preparation. Urea was top dressed in three equal splits at 15, 30 and 45 DAT. Cowdung, where applicable, were incorporated into the soil just after first ploughing. Fifteen day old seedlings were transplanted on 3 August 2006 with 1 seedling hill^-1 following the spacing of 40 cm × 40 cm under SRI technique. Intercultural operations were done as and when necessary. Excess water was drained out from the plot during the vegetative stage of crop growth. During tillering, the field was left to dry out for 2 to 4 days. Watering was done when hairy cracks developed on the soil surface. Starting from panicle initiation a thin layer of water (2-3 cm) was kept on the soil surface. Again water was expelled out from the plots during the ripening stage. Ten hills excluding border rows from each plot were selected and uprooted prior to harvest for recording data on different crop characters. Different varieties were harvested on 10, 12 and 15 December 2006 depending on the maturity. Grains were threshed, cleaned, sun dried and the grain yield plot^-1 was recorded at 14% moisture content. Straw was sun dried to recorded the straw yield plot^-1. Finally grain and straw yields were converted to t ha^-1. Data were analyzed statistically and the mean differences were adjudged by Duncan’s Multiple Range Test (DMRT).

Source of Information: J. Agrofor. Environ. 1(2): 135-138, 2007 ; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The results of the present study thus indicate that for obtaining higher grain yield from fine rice, high yielding variety BRRI dhan34 or BRRI dhan38 should be grown with recommended fertilizer and Basmati with recommended fertilizer + 5 t cowdung ha^-1 or 50% RF + 10 t cowdung ha^-1. However the latter one i.e. integrated nutrient management approach may be considered as a viable option so far soil fertility is of our great concern.

Knowledge Management: Journal