Impact of nitrogen fertilizer from organic and conventional sources on seed yield of Niger (Guizotia abyssinica Cass.)
By: Monaswita Talukdar, P B S Bhadoria, Subhash Chandra Mahapatra
Key Words: Niger, organic sources, Vermicompost, Bonemeal, Minor oil seed crop, Oilcake.
Int. J. Agr. Agri. Res. 9(1), 16-24, July 2016.
Niger (Guizotia abyssinica Cass.), a minor oil seed crop cultivated on marginal and sub marginal lands under poor or neglected nutrient management practices in India has a good production potential even under low nutrient input conditions. However, not much study has been made on nutrient management practices for optimising plant growth and thereby seed yield. The study was undertaken to determine the growth and seed yield response of Niger to different nitrogen sources in rainfed acid lateritic uplands. Nitrogen was applied through chemical (Urea) and organic sources (Vermicompost, Mustardoilcake and Bonemeal) separately and in combination of these at two levels (30 and 60 kg ha-1) in consecutive two years (2013-’14 and 2014-’15). Maximum seed yield (580 kg ha-1) and dry matter yield (4530 kg ha-1) of Niger were obtained where oilcake was applied in combination with chemical nutrients. However, varying sources or level of nitrogenous nutrients had no impact on oil content in seeds of Niger. Among the various sources of Nitrogen, combination of oilcake and chemical provided sufficient amount of Nitrogen to the soil which was observed through highest uptake as well as leftover available Nitrogen in soil.