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Effect of K on Nutrient Content, Uptake and K Use Efficiency by Wheat Under High Ganges River Flood Plain Soil

M. Robiul Alam
On Farm Research Division, Bangladesh Agricultural Research Institute, Pabna

S.M.A. Hossain
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

M. Akkas Ali
On Farm Research Division, Bangladesh Agricultural Research Institute, Pabna

M.Q. Haque
Bangladesh Institute of Nuclear Agriculture, Mymensingh

M.S.H. Molla
On Farm Research Division, Bangladesh Agricultural Research Institute, Pabna

Abstract/ Executive Summary:

An experiment was carried out at farmers field of Pushpapara, Pabna during the year 2005-06 to evaluate the effect of potassium on nutrient content, uptake and use efficiency by wheat. Five different levels of K were used in the investigation following randomized complete block design. The result revealed that the highest nutrient content specially N, P and K content in grain and N and K content in straw was attained with the application of 36 kg K ha^-1. The highest uptake of N, P, K and S by grain and straw was obtained from the application of 36 Kg K ha^-1 followed by 48 Kg K ha^-1. It was also revealed that the total uptake of N, P, K and S was attained in 36 Kg K ha^-1 which was 34.73%, 7.45%, 39.85% and 4.04% higher over control (K omission). The highest agronomic efficiency, physiological efficiency and apparent K recovery was attained with the application of 12 Kg K ha^-1 and it was declined with further addition of K. The overall results indicated that the application of 36 kg K ha^-1 contributed to the maximum nutrient content and uptake by wheat crop and agronomic efficiency, physiological efficiency and apparent K recovery was negatively correlated with applied K.

Keywords: Wheat, K level, Nutrient content, Nutrient uptake and K use efficiency

Location: Farmers’ field of Pushpapara, Pabna

Start Date: 00-11-2003

End Date: 00-04-2004

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

1. To ascertain the effect of added potassium on nutrient content, uptake and use efficiency by wheat under High Ganges River Flood plain Soil.

Methodology:

The experiment was carried out at farmers’ field of Pushpapara, Pabna during 2003-04 under Gopalpur soil series belongs to the High Ganges River Floodplain soils (AEZ-11). Before starting the experiment, initial composite soil samples (0-15 cm depth) were collected from the experimental plots and the physiochemical properties were analyzed. The analysis result indicated that the soil was silty loam with low organic matter content (1.22%) and slightly alkaline in nature. Nitrogen and P content of the soil was low but K, S and B content was medium. Zn content of the soil was high.The experiment was laid out in randomized complete block (RCB) design with three replications. The unit plot size was 5 m x 4 m. Five different levels of potassium (0, 12, 24, 36 and 48 Kg ha^-1) were employed in the study. The experimental plot was well prepared with a power tiller by ploughing and cross ploughing and the soil was brought into good tilth condition. Potassium fertilizer was applied as per treatment specification. A blanket dose of other nutrients (120-30-20-3-2 Kg N P S Zn B ha^-1) was applied for high yield goal. Half of nitrogen and the full amount of phosphorus, potassium, sulphur, zinc and boron were applied at the time of final land preparation in the forms of urea, triple super phosphate, muriate of potash, gypsum, and zinc oxide, respectively. Remaining half dose of urea was top dressed at 24 days after sowing. Wheat (var. Shatabdi ) seed was sown on November 24 in line (20 cm apart) at the rate of 120 kg ha^-1 and harvested on March 25, 2004. Recommended cultural practices were followed throughout the growing season. At the time of harvesting ten randomly selected plants from each plot were collected for nutrient analysis. Grain and straw yields were recorded from the total area of each plot. Grain yield per hectare was then calculated on 12% moisture content. Grain and straw samples were dried in an oven at 65^oc for 48 hours and then ground in a grinding machine. The ground samples of grain and straw were digested with standard procedure and then analyzed for N, P, K and S contents. Total nitrogen and phosphorous in the digest was estimated by Kjeldahl method and Spectrophotometer respectively.

Source of Information: J. Agrofor. Environ. 1(2): 39-42, 2007; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The highest agronomic efficiency, physiological efficiency and apparent K recovery was attained with the application of 12 Kg K ha^-1 and it was declined with further addition of K. The overall results indicated that the application of 36 kg K ha^-1 contributed to the maximum nutrient content and uptake by wheat crop and agronomic efficiency, physiological efficiency and apparent K recovery was negatively correlated with applied K.

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