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P-ISSN: 2349-8528, E-ISSN: 2321-4902   |   Impact Factor: GIF: 0.565

International Journal of Chemical Studies

Vol. 9, Issue 2 (2021)
Effect of organic manures and inorganic phosphorus on soil fertility status (N, P and K) in rice-blackgram cropping sequence


Author(s): I Jagga Rao, CH Sujani Rao, PRK Prasad, CH Pulla Rao and K Jayalalitha

Abstract: The present study attempts to relate the phosphorus dynamics in relation to nutrient management in rice- blackgram cropping sequence with respect to changes in soil fertility. Results of two years (2017-2019) experimentation revealed that at all growth stages of rice, significantly highest available nitrogen, phosphorus and potassium in soil were recorded with application of RDNK+Dhaincha @ 10t ha-1(M3) and this was on par with RDNK+ Sunhemp @ 10t ha-1(M2), whereas lowest was recorded in RDNK (M0) alone in all four seasons of study. Among the P levels the available nutrient status (N, P and K) were increased with the increasing level of P from 0 (P1) to 120 kg P2O5 (P5) ha-1, irrespective of the nutrients imposed to rice crop. Significantly highest was recorded in P5 (120 kg P2O5 ha-1) and this was on par with P4 (90 kg P2O5 ha-1), whereas the lowest was recorded in treatment P1 that received 0 kg P2O5 ha-1. However, as like preceeding rice crop the similar trend was observed at flowering and harvest in succeeding blackgram.

DOI: 10.22271/chemi.2021.v9.i2b.11710

Pages: 117-126  |  157 Views  23 Downloads

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How to cite this article:
I Jagga Rao, CH Sujani Rao, PRK Prasad, CH Pulla Rao, K Jayalalitha. Effect of organic manures and inorganic phosphorus on soil fertility status (N, P and K) in rice-blackgram cropping sequence. Int J Chem Stud 2021;9(2):117-126. DOI: 10.22271/chemi.2021.v9.i2b.11710
International Journal of Chemical Studies