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Effect of Rate and Timing of N Application, Harvesting Date and Cutting Height on Performance of Ratoon Crop of Br17

M A Rashid
Agronomy Division, BRRI, Gazipur.

Md A Jabbar
Agronomy Division, Bangladesh Rice Research Institute, Gazipur-1701
Agronomy Division.BRRI Gazipur.

S B Siddique
Agronomy Division, Bangladesh Rice Research Institute, Gazipur-1701

M A Rashid
Adaptive Research Division, Bangladesh Rice Research Institute, Gazipur-1701

K P Haldar
Farm Management Divisions, Bangladesh Rice Research Institute, Gazipur-1701

Abstract/ Executive Summary:

Application of nitrogen at the rate of 15 to 20 kg/ha to the main crop at 15 days before harvesting produced significantly higher grain yield of the successive ratoon crop. The optimum harvesting time of the main crop was at its physiological maturity for better performance of ratoon crop. Yield of ratoon crop increased with the increase in cutting height of the main crop, the optimum being ranged from 15 to 20 cm above the ground level.

Keywords: Timing of N Application, Harvesting, Performance of ratoon crop ,Cutting height

Location: BRRI, Gazipur-1701

Start Date: 01-11-1986

End Date: 31-09-1987

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The present study was carried out to optimize the cutting height and harvesting date of the main crop, N rate and time of application in addition to normal main crop fertilization, on the performance of successive ratoon crop.

Methodology:

Rate and timing of N application for ratooning: The experiment was conducted at BRRI Regional Station, Habiganj in the 1987 Boro season using BR17. Sixty-40-40 Kg N-P2O5-K20/ha was applied. Fertilizer P and K were applied at the final land preparation and N in three equal splits. In addition, 10 N treatment combinations, including three rates, three times of application and one control were tested in a randomized complete block (RCB) design with three replications.

Harvesting date of the main crop: The experiment was conducted with BR17 to find out the effect of six harvesting dates of the main Boro crop on the performance of its successive ratoon crop in 1987 at Habiganj. The experiment design was a randomized complete block with three replications.

Effect of cutting height of main crop on ratooning: One experiment was conducted with six cutting heights of the main crop (BR17) from 5 to 30 cm with 5 cm interval (above the ground level).

Source of Information: Bangladesh Rice J. 6(1&2) : 91-94, 1995

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 50,000/-

Total Budget (Tk.) : 50,000/-

Achievement/Findings:

Yield of ratoon crop increased with the increase in cutting height of the main crop, the optimum being ranged from 15 to 20 cm above the ground level.

Knowledge Management: Journal