Vol. 11, Issue 4 (2022)

Author(s):
Haramohan Rath, AK Verma and BB Panda

Abstract:
The effect of System based phosphorus management on available nutrients and enzymatic activities of soil under rainfed rice-greengram cropping system was evaluated under medium land situation at ICAR-NRRI, Cuttack, Odisha. The experiment was carried out in both kharif and rabi season of the years 2019-20 and 2020-21. The experiment was laid out in a split plot design with three replication with treatments consisted of i) four nutrient management practices in rice viz. Recommended Dose of Fertilizer (RDF), RDF+ 25% additional phosphorus through FYM, RDF+ 25% additional phosphorus through fertilizer and RDF₇₅ and ii) five nutrient management practices in greengram viz. Control (C), RDF, RDF+PSB Inoculation (RDF+ PSB), RDF+ Foliar spray of 2% DAP at flowering (RDF+ FS) and RDF+ PSB inoculation+ foliar spray of 2% DAP at flowering (RDF+PSB+FS). Effect of system based phosphorus management had significant effect on available nutrients and enzymatic activities of soil. Among the nutrient management practices in rice, the mean highest soil available nitrogen was recorded under RDF while the mean highest soil available phosphorus was recorded under RDF + 25% additional phosphorus though fertilizer. Among the sub plot treatments, significant difference in soil available phosphorus was observed in the second year. The mean highest and lowest soil available phosphorus was recorded under RDF and control respectively. With respect to acid and alkaline phosphatase activity of soil, the mean highest alkaline and acid phosphatase activities was recorded under RDF + 25% additional phosphorus through FYM, RDF + PSB +FS in nutrient management in rice and greengram respectively.