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Nitrogen Management for Short Duration T. Aman Rice with Aged Seedlings

Romana Akter*
Agronomy Division, Bangladesh Rice Research Institute, Bangladesh

Mohammad Adil Badshah
Agronomy Division, Bangladesh Rice Research Institute, Bangladesh

Amena Sultana
Agronomy Division, Bangladesh Rice Research Institute, Bangladesh

Mohsina Jahan Turon
Department of Agriculture Extension, Ministry of Agriculture, Bangladesh

Mohammad Jahidul Islam
Department of Entomology, Sher-e-Bangla Agriculture University, Dhaka-1207, Bangladesh

Abstract/ Executive Summary:

Intensive crop cultivation become popular in many parts of Bangladesh and the cropping pattern in Bangladesh is T. Aman rice based. To allow intensive crop cultivation short duration rice varieties should be selected. But due to adverse situation sometimes farmers have to delay transplanting with aged seedlings. So this experiment was taken to find out appropriate nitrogen management for short duration T. Aman rice with aged seedlings. The experiment was conducted in Aman 2017 at Bangladesh Rice Research Institute (BRRI) farm, Gazipur. The soil of BRRI farm was clay loam under Madhupur tract (AEZ 28).The experiment was laid out in split-split plot design with three replications. The experiment was laid out in split-split plot design with three replications. The main plot treatment was fertilizer management options: M1 = N: 70 kg ha-1 and 1/3rd as basal + 1/3rd at 10 DAT + 1/3rd at 25 DAT and M2= N: 120 kg ha-1 and 2/3rd as basal + 1/3rd at 25 DAT. The sub plot treatment was variety: V1 = BRRI dhan56, V2 = BRRI dhan62, V3 = BRRI dhan71 and V4 = BRRI dhan75. Sub-sub plot treatment was seedling age: A1 = 20 days, A2 = 25 days, A3 = 30 days, A4 = 35 days and A5 = 40 days. M1 gave higher yield for all aged seedlings. Comparatively higher yield was found in younger seedlings but with M1 the yield reduction of aged seedlings of short duration rice varieties can be minimized.

Keywords: Nitrogen management, Short duration, T. Aman rice, Aged seedling

Location: Bangladesh Rice Research Institute (BRRI) farm, Gazipur

Start Date: 00-08-2017

End Date: 00-12-2017

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Rice

Objectives:

This experiment was conducted to find out suitable nitrogen management practices for short duration T. Aman rice varieties with aged seedlings.

Methodology:

Experimental site and design The experiment was conducted in Aman season (December-January), 2017 at Bangladesh Rice Research Institute (BRRI) farm, Gazipur. The soil of BRRI farm was clay loam under Madhupur tract (AEZ 28). The experiment was laid out in split-split plot design with three replications.

Treatments The main plot treatment was fertilizer management options: M1 = N: 70 kg ha-1 and 1/3rd as basal + 1/3rd at 10 DAT + 1/3rd at 25 DAT and M2= N: 120 kg ha1 and 2/3rd as basal + 1/3rd at 25 DAT. The sub plot treatment was variety: V1 = BRRI dhan56, V2 = BRRI dhan62, V3 = BRRI dhan71 and V4 = BRRI dhan75. Sub-sub plot treatment was seedling age: A1 = 20 days, A2 = 25 days, A3 = 30 days, A4 = 35 days and A5 = 40 days.

Planting method and application of fertilizers Seedlings were transplanted on 31 July, 2017at a spacing of 20 × 20 cmusing one seedling per hill. The full dose of P-K-S (11-41-11 kg ha-1 ) was applied during final land preparation.

Data collection procedure Leaf area index (LAI) was taken at heading stage from one representative hill (selected from average of twelve hills). Plant height was measured from the base of the plant to tip of the panicle. At maturity, 5 m 2 area was harvested for grain yield and adjusted to 14% moisture content.

Statistical analysis The data were statistically analyzed using Statistix10analytical software. The least significant difference (LSD) at 5% probability was used to compare means of the treatments.

Source of Information: International Journal of Applied Research, 6 (1): 31-36.

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In an adverse situations when farmers have to use overaged seedlings of short duration rice varieties they should maintain appropriate nitrogen management for optimum yield. Excess nitrogen application should be avoided and three split applications of nitrogen should be practiced even in old seedlings of short duration rice variety. Farmers need to find out appropriate agronomic management for aged seedlings of short-duration rice variety.

Knowledge Management: Journal