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Combined Effect of Potassium and Boron on Low-temperature Tolerance in Mungbean Under Late Sowing Condition

Mohshina Mustare Liza
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Swarna Shome
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Alak Barman
Soil Science Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh

Polly
Department of Horticulture, First Capital University of Bangladesh, Chuadanga, Bangladesh

Md. Eliyachur Rahman
Department of Agricultural Chemistry, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the research field of Sher-e-Bangla Agricultural University to study the effect of potassium and boron on low-temperature tolerance in mungbean under late sowing conditions. Two levels of potassium (10 kg and 20 kg ha^-1) and 2 levels of boron (1 kg and 2 kg ha^-1) were applied with recommended fertilizer dose in case of mungbean sown on 24 September and 25 October. The experiment was laid out in randomized complete block design with three replications. Results revealed that mungbean sown on 24 September performed better than those sown on 25 October but the addition of potassium and boron with recommended dose improved the performance of late sown mungbean. Mungbean sown on 24 September produced the highest seed yield with the addition of 10 kg K and 2 kg B while mungbean sown on 25 October provided maximum yield due to the addition of 10 kg K and 1 kg B. So, 10 kg K + 2 kg B and 10 kg K + 1 kg B with recommended dose may be suggested for mungbean sown on 24 September and 25 October, respectively.

Keywords: Harvest index; Sowing time; Temperature stress; Yield. Mungbean

Location: Sher-e-Bangla Agricultural University Farm

Start Date: 00-09-2013

End Date: 00-01-2014

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer, Mungbean, Mungbean

Objectives:

To scrutinize the combined effect of potassium and boron on low- temperature tolerance in mungbean under late sowing conditions.

Methodology:

The experiment was conducted at Sher-e-Bangla Agricultural University Farm (23074/latitude and 95035/longitude) during the period between September 2013 and January 2014. The climate of the experimental site is sub-tropical, the land of the selected experimental plot is medium-high under the Tejgaon series (FAO, 1988). BARI Mung-6 was used as a test crop. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. There were ten different treatment combinations viz. T₁= Recommended dose of chemical fertilizer (FRG, 2012) + sowing time 24 September, T₂= Recommended fertilizer dose + sowing time 25 October, T₃= T₁ + 10 kg K + 1 kg B, T₄= T₁ + 20 kg K + 1 kg B, T₅= T₁ + 10 kg K + 2 kg B, T₆= T₁ + 20 kg K + 2 kg B, T₇= T₂ + 10 kg K + 1 kg B, T₈= T₂ + 20 kg K + 1 kg B, T₉= T₂ + 10 kg K + 2 kg B and T₁₀= T₂ + 20 kg K + 2 kg B. The land of the experimental plot was prepared with a power tiller on 23 September 2013. The full amount of N, P, K, and B was applied at the time of final land preparation in the forms of urea, triple superphosphate, muriate of potash, and boric acid, respectively. The experimental plots were fertilized as per treatment. Crop management activities were done when needed. Mungbean (var. BARI Mung-6) was sown apart rows maintaining row to row distance of 30 cm. Seed to seed distance was 10 cm. The sowing date was maintained as per treatment. Data on plant height, days to flowering, pod length (cm), no. of pods plant^-1, no. of seeds pod^-1 were recorded from ten pre-selected plants. Dry matter of leaves and stems was measured by uprooting three plants from each plot and drying them in the oven. Thousand seed weight, seed yield, stover yield, biological yield, and harvest index were recorded after harvesting, threshing, and drying. Seed yield was determined at 12% moisture content. The collected data was compiled and analyzed statistically using the analysis of variance (ANOVA) technique with the help of a computer package program MSTAT-C and the mean differences were adjusted by the Least Significance Difference (LSD) test at 5% probability level (Gomez and Gomez, 1984).

Source of Information: International Journal of Biosciences - Vol. 19, No. 2, p. 108-117, 2021

Article Link (Online Journal): http://dx.doi.org/10.12692/ijb/19.2.108-117

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Based on the above result, it was observed that yield of BARI Mung-6 can be significantly increased by adding 10 kg K ha^-1 + 2 kg B ha^-1 when sown on 24 September and by supplementing 10 kg K ha^-1 + 1 kg B ha^-1 with recommended fertilizer dose when sown on 25 October. Further experimentation will be required with other combinations of sowing time along with the different levels of potassium and boron fertilizer to find out the best potassium and boron supplementation dose to tolerate different levels of temperature stress.

Knowledge Management: Journal