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Effect of Foliar Spray of Potassium at Different Doses in Different Times.

Md. Habibur Rahman Mian
Cotton Agronomist
Cotton Research, Training and Seed Multiplication Farm,Sreepur, Gazipur

Dr. Md. Kamrul Islam
Senior Scientific Officer
Cotton Research, Training and Seed Multiplication Farm,Sreepur, Gazipur

Md. Rezaul Amin
Senior Scientific Officer
Cotton Research, Training and Seed Multiplication Farm,Sadarpur, Dinajpur

Khalequzzaman
Scientific Officer
Cotton Research, Training and Seed Multiplication Farm,Jagadishpur, Jessore

Abstract/ Executive Summary:

An experiment was conducted in 2005-2006 at three cotton research farms located at Sreepur, Sadarpur and Jagadishpur to know the effect of foliar spray of potassium at different doses in different times on seed cotton yield. The performance of foliar application of 0.25%, 0.50%, 0.75% and 1% potassium in one time (at first squaring stage) or two times (at first squaring and first flowering stages) in combination with soil-applied potassium (104 kg K/ha) were compared with soil-applied potassium (104 kg K/ha) only. The highest average seed cotton yield 1.75 t/ha was obtained from 2 spray of 1% K together with soil- applied K.

Keywords: Cotton, Foliar spray, potassium, cotton

Location: Sreepur, Gazipur; Sadarpur, Dinajpur and Jagadishpur, Jessore

Start Date: 01-07-2005

End Date: 30-06-2006

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

The objective of this study was to know the suitable concentration and time for foliar potassium application appropriate for our cotton variety.

Methodology:

An experiment was conducted in 2005-2006 to determine the effect of foliar potassium on cotton at three cotton research farms located at Sreepur, Sadarpur and Jagadishpur. There were nine treatments viz.: 1. Soil applied K (104 kg K/ha) 2. Soil applied K + 1 spray of 0.25% K at first flowering stage 3. Soil applied K + 1 spray of 0.50% K at first flowering stage 4. Soil applied K + 1 spray of 0.75% K at first flowering stage 5. Soil applied K + 1 spray of 1% K at first flowering stage 6. Soil applied K + 2 spray of 0.25% K at first squaring and first flowering stage 7. Soil applied K + 2 spray of 0.50% K at first squaring and first flowering stage 8. Soil applied K + 2 spray of 0.75% K at first squaring and first flowering stage 9. Soil applied K + 2 spray of 1% K at first squaring and first flowering stage The experiment was conducted in RCBD with 3 replications. Unit plot size was 6 m × 4.5 m. Cotton variety CB-9 was used as the test material. Uniform management practices were adopted for all plots. Yield data were recorded from the three middle rows and analysis of variance was done by MSTAT.

Source of Information: M H R Mian, M K Islam, M. R. Amin, Khalequzzaman. (2006). Effect of foliar spray of potassium at different doses in different times. Annual Research Report, Cotton Development Board, Ministry of Agriculture, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The average seed cotton yield 1.37, 1.45, 1.50, 1.59, 1.65, 1.43, 1.45, 1.59, 1.75 t/ha were obtained from the treatments Soil applied K (104 kg K/ha), Soil applied K + 1 spray of 0.25% K at first flowering stage, Soil applied K + 1 spray of 0.50% K at first flowering stage, Soil applied K + 1 spray of 0.75% K at first flowering stage, Soil applied K + 1 spray of 1% K at first flowering stage, Soil applied K + 2 spray of 0.25% K at first squaring and first flowering stage, Soil applied K + 2 spray of 0.50% K at first squaring and first flowering stage, Soil applied K + 2 spray of 0.75% K at first squaring and first flowering stage and Soil applied K + 2 spray of 1% K at first squaring and first flowering stage respectively.

Knowledge Management: Report/Proceedings