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Subject: Agronomy × Author: Gurpreet Singh × End date: 2022 × Start date: 2020 × Type: Thesis ×
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    Growth and productivity of lentil (Lens culinaris Medik.) genotypes as influenced by seed rate
    (Punjab Agricultural University, Ludhiana, 2022) Gurpreet Singh; Guriqbal Singh
    The study entitled ‘Growth and productivity of lentil (Lens culinaris Medik.) genotypes as influenced by seed rate’ was carried out in the rabi season of 2019-20 and 2020-21 as a field experiment at the research farm of the Pulses Section, Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana. The experimental field had normal soil reaction and electrical conductivity, low organic carbon & available nitrogen, medium available phosphorus and available potassium. The eight treatment combinations comprising four seed rate levels (30.0, 37.5, 45.0 and 52.5 kg ha-1) and two lentil genotypes (LL 1373 and LL 931) were laid out in Factorial Randomised Complete Block Design and replicated four times. Crop was planted at a row spacing of 22.5 cm and followed recommended cultural practices. The highest seed yield, averaged over both the years, was recorded at seed rate of 45.0 kg ha-1. Harvest index, gross returns, net returns and benefit cost ratio were also recorded the highest at seed rate of 45.0 kg ha-1. Genotype LL 1373 recorded higher growth parameters (shoot dry matter accumulation plant-1, number of branches, stem diameter) and took lower number of days to 50% flowering and maturity than LL 931. Symbiotic parameters were significantly higher for LL 931 than genotype LL 1373. Genotype LL 1373 recorded significantly higher 100-seed weight than LL 931. Averaged over both the years, significantly the highest seed yield was recorded for genotype LL 1373 at seed rate of 45.0 kg ha-1 (1783 kg ha-1) over all other treatment combinations. Gross returns, net returns and B:C averaged over both the years were obtained significantly the highest for genotype LL 1373 at seed rate of 45.0 kg ha-1 over all other treatment combinations (except B:C ratio which was at par with genotype LL 1373 at the seed rate of 37.5 kg ha-1). However, small seeded genotype LL 931 was found to be economically viable only when sown at 30.0 and 37.5 kg ha-1 seed rate. It can be concluded that, for obtaining high productivity and net returns, sowing of lentil genotype LL 1373 at seed rate of 45.0 kg ha-1 is found to be the most efficient.