Vol. 12, Issue 4 (2023)

Author(s):
Jyotiprakash Mishra, Sabyasachi Biswal, Sanghamitra Pattnaik, Swapnashree Sahoo, Sweekruta Mohapatra, Jayashankar Pradhan, Subrat Kumar Mahapatra and Soumyashree Swain

Abstract:
The field study was conducted during the kharif and rabi seasons of 2016-17, 2017-18 and 2018-19 to evaluate the effect of green manuring and establishment methods on the growth parameters of the rice-rice system. The experimental site was sandy loam in texture, slightly acidic in reaction, low in available N (198 kg/ha), medium in available P (18 kg/ha), K (193 kg/ha), OC (0.51%) with EC (0.20 dS/m). The rice variety “Swarna sub-I” and “Lalat” were grown in kharif and rabi seasons, respectively. The experiment was designed with two groups of treatments, one without green manuring and the other with green manuring with Sesbania in the main plot along with nine establishment methods i.e PTR-PTR, PTR-NPTR, PTR-DSR, NPTR-PTR, NPTR-NPTR, NPTR-DSR, DSR-PTR, DSR-NPTR, DSR-DSR as subplots in kharif and rabi seasons. From the above experiment, it is observed that green manuring recorded higher grain yield of 9211 kg/ha, recovering higher N from the soil (163.9 kg/ha) while, registering higher internal nitrogen use efficiency of 56.0 kg/kg and irrigation water productivity of 0.52 kg/m³. Among the different establishment systems, NPTR-PTR method was found to be superior with a yield of 11337 kg/ha, nitrogen uptake of 186.8 kg/ha, internal nitrogen uses efficiency of 60.7 kg/kg and irrigation water productivity of 0.67 kg/m³.