Effect of Organic Manures and Phosphorus on Soil Nutrient Status in Kharif Rice

I. Jagga Rao *

KBR College of Agriculture, C.S Puram, Prakasam (Dt) - 523112, India.

Ch. Sujani Rao

Department of Soil Science, Technical Team of Subject Expert, Integrated Call Centre, Gannavaram, Vijayawada-521101, India.

P. R. K. Prasad

Department of Soil Science, ANGRAU, Lam, Guntur, Andhra Pradesh-522034, India.

Ch. Pulla Rao

Department of Agronomy, Agricultural College, Bapatla-522101, India.

K. Jayalalitha

Department of Crop Physiology, ANGRAU, Lam, Guntur, Andhra Pradesh-522034, India.

*Author to whom correspondence should be addressed.


Field experiments were conducted at Agricultural College Farm, Bapatla during Kharif and Rabi seasons of 2017-2018 and 2018-2019 to study the Phosphorus dynamics in relation to nutrient management in rice- blackgram cropping sequence with respect to changes in soil nutrient status. 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 both 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.

Keywords: Organic manures, phosphorus fertilizer, soil nutrient status, kharif rice

How to Cite

Rao , I. Jagga, Ch. Sujani Rao, P. R. K. Prasad, Ch. Pulla Rao, and K. Jayalalitha. 2023. “Effect of Organic Manures and Phosphorus on Soil Nutrient Status in Kharif Rice”. International Journal of Environment and Climate Change 13 (11):3497-3507. https://doi.org/10.9734/ijecc/2023/v13i113525.


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