HARPREET KAUR OBEROI* AND MANINDER KAUR
Department of Pant Breeding and Genetics,
Punjab Agricultural University, Ludhiana (Punjab), India
*(e-mail : harpreetoberoi@pau.edu)
(Received : 3 March 2020; Accepted : 30 June 2020)
SUMMARY
The efficiency towards nitrogen uptake and its utilization may vary in different sorghum genotypes due to inherited biological nitrification inhibition potential. In this study, four sorghum single cut genotypes (SPH 1890, SPH 1891, CSV 30F and CSV 32F) were grown with three fertility levels (75% RDF, 100% RDF and 125% RDF). The results revealed that higher the fertilization (125% RDF) higher the biomass yield obtained with improved fodder quality parameters. Sorghum genotype CSV 32F had the highest green and dry fodder yield and it also had better digestibility in comparison to other genotypes. The highest nitrogen uptake was recorded in the genotype SPH 1891 which resulted in higher crude protein yield in this genotype but it noticed to have positive correlation with HCN (anti-nutrient) which is not desirable in livestock feed. In conclusion, use of 125% RDF and the genotypes CSV 32F would enhance the fodder yield due to comparatively better nitrogen uptake ability and its significant positive correlation with fodder quality parameters and growth attributes.
Key words:Nitrogen uptake, sorghum, biomass yield, fodder quality