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Response of Wheat to Boron at Different Sowing Dates

M. Jahiruddin
Department of Soil Science, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

An experiment was set up at BAU farm, Mymensingh to see the response of some wheat cultivars to boron at different sowing dates. The field trial comprised two B treatments (0 and 3 kg B/ha), three wheat cultivars (Sonalika, Kanchan and Aghrani) and four dates of sowing with 10-day intervals beginning from 20 November of 1993. The results demonstrated that B had significant and positive effect on the number of grains/spike and grain yield. The yield due to different dates of sowing followed the order: 30 November > 20 November > 10 December > 20 December. Yield performance of Kanchan and Aghrani was better than that of Sonalika. Boron treatment and sowing time influenced wheat yield independently so that the yield loss due to late sowing was not compensated by added B and similarly, the yield gap due to B deficiency was not removed by timely sowing. Nutrient analysis showed that grain N and B contents were increased after B treatment indicating that B had probably helped protein synthesis.

Keywords: Boron treatment, Sowing date, Wheat cultivars

Location: Bangladesh Agricultural University Farm, Mymensingh

Start Date: 00-00-1993

End Date: 00-00-1994

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

To examine the response of wheat to main and interaction effects of boron, variety and sowing dates.

Methodology:

The experiment was conducted on Non-calcareous Dark Grey Floodplain soil (Sonatala series) at BAU farm, Mymensingh in the winter season of 1993-94. The soil belongs to the AEZ, Old Brahmaputra Floodplain. The experimental soil had the following characteristics: texture-silt loam, pH - 6.7, organic matter - 1.25%, total N - 0.072%, available P - 12.0 ppm, available K - 1.05. me%, available S - 10.0 ppm, and available B - 0.13 ppm. The field trial was designed with two B treatments (0 and 3 kg B/ha), three wheat varieties (Sonalika, Kanchan and Aghrani) and four dates of sowing with10-day intervals between two sowings (20 November, 30 November, 10 December and 20 December). The experiment was laid out in split-split-plot design with four replications. The layout was made distributing sowing dates to main plots, wheat varieties to sub-plots and B treatments to sub-sub-plots, each unit plot being 5m x 3m. Each of the plots received a basal dose of 100 kg N, 60 kg P₂0₅, 40 kg K₂0 and 20 kg S per hectare from urea, TSP, MP and gypsum, respectively. Boric acid was used as a source of B. All the elements except N were added to soil during final land preparation. Nitrogen was applied in three equal splits - the first split at land preparation, the second split at tillering and the remaining split at booting stage of crop growth. Intercultural operations such as weeding and irrigation were done as and when required.

Source of Information: BAU Res. Prog. 9: 118-124, 1995

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Boron treatment significantly influenced the grain yield of Kanchan. Late sowing i.e. sowing in the 2nd or 3rd week of December caused a serious loss of wheat yield and that yield gap was not compensable by boron treatment. Similarly, the yield loss due to B deficiency was not removed by timely sowing. The whole results suggest that Kanchan variety if sown in the end of November with 3 kg B/ha treatment along with blanket application of N, P, K and S can ensure higher yield of wheat in BAU farm and its adjacent areas.

Knowledge Management: Journal