RHIZOSPHERE MICROBIOME, SOIL ENZYMES AND GROUNDNUT YIELD AS INFLUENCED BY ADDITION OF BIOCHAR AND FERTILIZERS IN IRRIGATED ALFISOL OF NORTH COASTAL ANDHRA PRADESH


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Authors

  • B. GOWTHAMI and P. GURUMURTHY* Department of Soil Science and Agricultural Chemistry, Acharya N.G. Ranga Agricultural University, Agricultural College, Naira- 532 185

https://doi.org/10.58537/jorangrau.2023.51.4.06

Keywords:

Alfisol; Biochar; Groundnut; Rhizosphere microbiome; Soil enzymes

Abstract

The field experiment was conducted in irrigated Alfisols of North coastal Andhra Pradesh to
study the effect of biochar and chemical fertilizers on rhizosphere microbiome, soil enzymes and
yield performance of groundnut crop (variety K-6) during rabi, 2018-19. Biochar application to
soil significantly increased soil bacterial, fungal and actinomycetes population. At pod development
stage, the highest number of bacterial count (39.0 x106 CFU g-1 soil) was observed in T5
 (100%
RDF + biochar @ 6 t ha-1) which was on par with all the biochar applied treatments (T3, T4
, T6, T7
,
T8
). The Biochar applied @ 6 t ha-1 (T5 & T8
) significantly increased the bacterial population as
compared to non-biochar applied treatments (T1 & T2). Fungal and actinomycetes population
followed the similar trend of bacterial count. Soil urease activity was significantly superior in
biochar applied treatments (T3, T4, T5, T6, T7, T8) compared to non biochar applied treatments (T1
and T2). With increased rates of biochar application the urease activity markedly increased in
soil. Similar trend was noticed with respect to dehydrogenase, acid phosphatase and alkaline
phosphatase enzymes in soil in response to addition of biochar. At pod development stage, the
highest leaf area index (3.16) was recorded with 100% RDF + biochar @ 6 t ha-1(T5
) which was
significantly higher than T1 (control), T2 (100% RDF) and T6 (75% RDF + biochar @ 2 t ha-1). The
highest drymatter accumulation of 2951 kg ha-1 at peg penetration and 6428 kg ha-1 at pod
development was observed in T5 (100% RDF + biochar @ 6 t ha-1) which was on par with T3
(100% RDF + biochar @ 2 t ha-1), T4 (100% RDF + biochar @ 4 t ha-1), T8 (75% RDF + biochar @
6 t ha-1) treatments. Groundnut pod yield was highest (4019.58 kg ha-1) in treatment received
100% RDF + biochar @ 6 t ha-1, which was on par with T4 (100% RDF + biochar @ 6 t ha-1) and T8
(75% RDF + biochar @ 6 t ha-1).

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Submitted

20-02-2024

Published

26-03-2024

How to Cite

B. GOWTHAMI and P. GURUMURTHY*. (2024). RHIZOSPHERE MICROBIOME, SOIL ENZYMES AND GROUNDNUT YIELD AS INFLUENCED BY ADDITION OF BIOCHAR AND FERTILIZERS IN IRRIGATED ALFISOL OF NORTH COASTAL ANDHRA PRADESH. The Journal of Research ANGRAU, 51(4), 47-56. https://doi.org/10.58537/jorangrau.2023.51.4.06

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