SOYBEAN GERMPLASM SHOWS VARIATION IN FARMERS PARTICIPATORY TRIAL IN THE COASTAL REGION OF BANGLADESH
Authors:   Department of Agronomy, Bangabandhu Sheikh Muijibur Rahman Agricultural University, Gazipur-1706, Bangladesh, Karim Md. Abdul , Mannan Md. Abdul ,   Department of Agronomy, Bangabandhu Sheikh Muijibur Rahman Agricultural University, Gazipur-1706, Bangladesh;, Mamun Md. Abdullah Al ,   Department of Agronomy, Bangabandhu Sheikh Muijibur Rahman Agricultural University, Gazipur-1706, Bangladesh;, Hoque Mohammad Moziball ,   Solidaridad Network Asia, House# 32, Road 10A, Dhanmondi, Dhaka-1209, Bangladesh, Hossain Md. Farhad ,   Solidaridad Network Asia, House# 32, Road 10A, Dhanmondi, Dhaka-1209, Bangladesh, Saifullah Mohammad ,   Solidaridad Network Asia, House# 32, Road 10A, Dhanmondi, Dhaka-1209, Bangladesh, Hashi Uswatun Hasana ,   Department of Agricultural Science, Daffodil University, Dhaka-2016, Bangladesh
Published: October 2024

The cultivation of soybean is still concentrated in the coastal region of greater Noakhali District of Bangladesh, where salinity hinders crop production. There is no suitable salt tolerant variety so far. At Bangabandhu Sheikh Mujibur Rahman Agricultural University, 170 soybean genotypes were screened and finally three,namely AGS313 (BU soybean-3), G00028 (BU soybean-4), and BD2330 were found fairly salt tolerant at 5 and 10 dSm-1 salinity. In Rabi 2022-23 season the selected three genotypes, G00056 as a high yielding promising genotype, and three varieties namely BU soybean-2, BARI soybean-6 and Binasoybean-2, i.e. altogether seven genotypes were grown in 700 decimals land, both saline and non-saline soils, of 12 farmers in different upazillasof Noakhali, Laksmipur and Bhola districts. The seeds were sown by the last week of January’ 23. Salinity of the fields at harvestwas found 5- 13 dSm-1, thoughinitially varied from 0 – 4 dSm-1. Yield contributing characters were measured appropriately. Standard error was used for showing the mean differences. Farmers’ discussion on the performance of the genotypes were held from time to time. Salinity decreasedplant height, maturityduration, number of pods plant-1, 1000-seed weight and grain yield ha-1. However, AGS313 and G00028 were affected less than other genotypes. Under non-saline and low saline conditions relatively higher yield was found in BU soybean2 (2657 kg ha-1 in Bhola, 3397 kgha-1 in Subornachar), G00056 (2341 in Laksmipur sadar, 3390 kg ha-1 in Subornachar), AGS313 (2612 in Ramgoti, 3266 kg ha-1 in Subornachar) and G00028 (2464 in Bhola sadar, 3374 kg ha-1 in Subornachar) compared to other genotypes. The lowest yield was found in BARI soybean6 (1715 kg ha-1 in Ramgoti) followed by Binaoybean-2 (1868 kg ha-1 in Laksmipur sadar). However, under saline field conditions (5- 8 dSm-1) G00028 (866 kg ha-1 in Komolnagar, 1374 kg/ha in Subornachar) and AGS313 (860 kg ha-1in Ramgoti, 1333 kg ha-1 in Subornachar) produced substantially higher yield than other genotypes/ varieties. The lowest yield was obtained from G00056 (170 kg ha-1) from Komolnagar. Based on the results of multi-location trials, and discussions with the farmers the genotypes AGS313 and G00028 were registered as BU soybean-3and BU soybean-4, respectively as relatively salt tolerant varieties from the National Seed Board.