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.
Pages: 117-126 | 157 Views 23 Downloads
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