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Effect of Potassium Levels on the Growth, Yield and Yield Attributes of Lentil

S. A. Zahan
Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi-6205, Bangladesh

M. A. Alim
Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi-6205, Bangladesh

M. M. Hasan
Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi-6205, Bangladesh

U. K. Kabiraj
Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi-6205, Bangladesh

M. B. Hossain
Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi-6205, Bangladesh

Abstract/ Executive Summary:

A split experiment was conducted at the Agronomy Field Laboratory, University of Rajshahi to study the effects of potassium levels on the growth, yield and yield contributing characters of lentil. The experiment comprised of three varieties viz. BARI masur-4, BARI masur-5 and BARI masur-6 and five potassium levels viz. 0, 15, 25, 35 and 45 Kg K ha^-1. The results revealed that among the three varieties, BARI masur-6 produced the highest seed yield (2.24 t ha^-1) and BARI masur-4 produced the lowest seed yield (1.79 t ha^-1). Grain and stover yield of all varieties were increased with the increase of potassium application up to 35 kg ha^-1. The highest grain yield (2.16 t ha^-1) was found at 35 kg K ha^-1 and the lowest grain yield (1.61 t ha^-1) was exhibited from control potassium level and the highest stover yield (3.89 t ha^-1) was also found in 35 kg K ha^-1 and the lowest (3.32 t ha^-1) was found in control potassium level. In case of interaction, the highest seed yield (2.58 t ha^-1) was produced by BARI masur-6 with 35 kg K ha^-1. Therefore, fertilization of all the varieties with 35 kg Kha^-1 appeared as the best rate of potassium in respect of grain and stover yield. It can be suggested that farmers may be used BARI masur-6 with 35 kg K ha^-1 for better grain and stover production of lentil.

Keywords: Lentil, Potassium, Yield attributes

Location: Agronomy Field Laboratory, University of Rajshahi, Rajshahi

Start Date: 00-11-2007

End Date: 00-03-2008

Program Area: Crop-Soil-Water Management

Commodity: Lentil

Objectives:

Objective of the study was to find out the effect of different rates of potassium on the yield of lentil.

Methodology:

The experiment was conducted at the Agronomy Field Laboratory, University of Rajshahi, Rajshahi, during the Rabi season from November, 2007 to March, 2008. The experimental treatment consisted of (a) three varieties, namely – BARI masur-4, BARI masur-5 and BARI masur-6, and (b) five levels of potassium viz. 0, 15, 25, 35, 45 kg ha^-1. The experiment was laid out in a split – plot design with three replications having 45 unit plots. The size of each unit plot was 2.0 m x 1.5 m. The plot-to-plot distance was 0.5 m and block to block distance was 1.0 m. The varieties were assigned in the main plot and potassium levels to the sub-plots. The experimental land was opened with a power tiller on 21 November, 2007 and subsequently 3 to 4 ploughing and cross ploughing with country plough followed by laddering was done to achieve a good tilth. Weeds, stubbles and crop residues were removed. The corners of the land were spaded and the larger clods were hammered to break into small pieces. The unit plots were finally prepared on the day of seed sowing. The plots were fertilized with Urea, TSP and boron fertilizer @ 45, 85 and 1.5 kg ha^-1 at the time of final land preparation. Potassium fertilizer was applied as per treatment at the time of final land preparation. The control plots received no potassic fertilizer. Seeds were sown on 22 November, 2007 maintaining a spacing of 25 cm apart with a seed rate of 30 kg ha^-1. Intercultural operations were done as and when necessary. Data on growth parameters and yield attributes were recorded. Five hills from each plot were randomly selected and uprooted after sowing for taking data on growth parameters like plant height, number of branches plant^-1, number of nodules plant^-1 and dry weight of plant at 20 days intervals beginning from 45 DAS to 85 DAS. At maturity, five hills were randomly selected and uprooted from unit plot excluding border rows for collecting data on yield and yield contributing characters. After sampling, the crop from each plot (1 m²) was harvested at full maturity to record the data on grain and straw yields. The collected data were analyzed statistically and means were calculated by Duncan’s Multiple Range Test (DMRT) and correlation was done by SPSS program.

Source of Information: Int. J. Sustain. Crop Prod. 4(6):1-6, 2009

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Grain and Stover yield of all varieties were increased with the increase of potassium application up to 35 kg K ha^-1. Therefore, fertilization of all the varieties with 35 kg K ha^-1appeared as the best rate of potassium in respect of grain and Stover yield. From this study, it may be suggested that farmers can used BARI Masur-6 variety with 35 kg K ha^-1for better grain and Stover production of lentil.

Knowledge Management: Journal