Vol. 11, Issue 12 (2022)

Author(s):
Kaushal Kishor, SK Chaudhary, Dharminder, Shankar Jha, Kavita and Ashok Kumar Singh

Abstract:
An experiment was conducted in the research farm of Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar during Kharif season, 2018 to study the effect of different nitrogen sources of nutrients on productivity of rice (Oryza sativa L.). The texture of the soil in the experimental plot was sandy loam and calcareous in nature with low organic carbon content, low available Nitrogen, medium available Phosphorus and low available Potassium. Eight treatments with organic nitrogen sources namely Mycostraw @ 50% RDN, Mycostraw @ 75% RDN, Mycostraw @ 50% RDN + 25% RDN through Vermicompost, Mycostraw @ 50% RDN + 25% RDN through Vermicompost + green manure with dhaincha, Mycostraw @ 50% RDN + green manure with dhaincha, Mycostraw @ 75% RDN + green manure with dhaincha, Mycostraw @ 75% RDN + microbial consortium (Azospirillum + PSB) and Control and three treatment with inorganic nitrogen sources with 50% RDN, 75% RDN and 100% RDN were used in factorial Randomised Block Design with three replication. The result of the experiment revealed that plant height (123.02 cm), number of tillers/m² (319.33) and leaf area index (5.31) were recorded significantly higher in treatment Mycostraw @ 50% RDN + 25% RDN through Vermicompost + green manure with dhaincha as compared to rest of the treatments while in chemical fertilizer treatments, 100% RDN recorded significantly higher plant height (119.88 cm), number of tillers/m² (289.75) and leaf area index (4.82), dry matter production (1205.73 g/m²), grain yield (46.19 q/ha) and straw yield (58.56 q/ha) as compared to 50% RDN but was statistically at par with 75% RDN. Mycostraw @ 50% RDN + green manure with dhaincha recorded significantly higher dry matter production (1227.82 g/m²), grain yield (53.26 q/ha) and straw yield (67.37 q/ha).