Evaluation of Lentil Genotypes in Different Sowing Windows in the New Alluvial Zone of West Bengal

Abstract

Background: Being a cool season crop, lentil is very sensitive to temperature during its growth stages. It is found that delayed harvest of the preceding crop which is most frequently rice causes the majority of the country’s lentil sowings to be postponed in India. As a result, the late-sown crop suffers during the seed-filling stage due to the rising high temperatures in most of its cultivated areas and results in lower yield. Therefore, there is a need to work out the optimum sowing time for realizing maximum yield potential as well as the selection of varieties suitable for normal as well as late sown condition of the crop. Methods: A field experiment was carried out in the new alluvial zone of West Bengal at the District Seed Farm of BCKV, Kalyani during the two subsequent rabi seasons (November-March) of 2019-2020 and 2020-2021 to examine the difference in yield between normal and late seeding conditions for various lentil cultivars. There were a total of ten genotypes evaluated, with each one being planted at one of two different times (15th Nov and 30th Nov). Result: The experimental findings revealed that lentil sown on 15th November recorded higher seed yield (2.34 t ha-1) compared to 30th November sown crop (1.63 t ha-1). Among the ten varieties, unreleased genotype C23E21 recorded the highest seed yield (2.25 t ha-1), followed by ILL 10802 (2.25 t ha-1). According to the results of this study, delaying the sowing window from the middle to the end of November can reduce yields by as much as 27.77%. Therefore, it is prudent to encourage the lentil farmers in the new alluvial zone region of West Bengal to sow their crops no later than the 15th of November of the Rabi season, to prevent a drop in production.