Influence of graded levels of inorganic with organics and biofertilizers on yield, quality and economics of turmeric (Curcuma longa L.)

Abstract

The study was carried out at horticulture experimental field of Central Agricultural University, Iroisemba, Imphal West, Manipur, during 2021-2022. Thirteen treatments and three replications were included in the RBD design of the experiment. Biofertilizers and organic manures are two more sustainable and alternative sources of nutrients. When biofertilizers and organic manure are mixed, the growth is affected by increased root biomass; total root surface increases nutrient absorption and yield by using less natural energy sources. The combination of organic manures viz., compost, vermicompost, mustard cake and neem cake and BF (biofertilizers) viz., nitrogenous (Azotobacter chroococcum), phosphate solubilizing bacteria (Bacillus polymixa) and potassic mobilizing (Fraturia aurantea) and three levels (100%, 75% and 50%) of NPK were included in this experiment along with recommended dose of NPK (150:60:150 kg/ha). Result of the present experimentation disclosed that the application of Vermicompost + NPK 100% + BF recorded significant value for yield per plot (15.40 kg 3.0 m -2 ), yield (38.50 t ha -1 ), curcumin content (6.32%) and oleoresin content (13.74%). The application of Vermicompost + NPK 100% + BF recorded maximum gross return (Rs. 1155000/ha), net return (Rs. 792252.04/ha) and highest B:C ratio (2.24) followed by Compost + NPK 100% + BF (2.11).