International Journal of Agriculture, Environment & Biotechnology

Citation: IJAEB: 7(3): 517-525 September 2014

DOI Number: 10.5958/2230-732X.2014.01356.4

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©2014 New Delhi Publishers. All rights reserved

Soil Science

Effect of Fertilizer Levels, FYM and Bioinoculants on

Soil Properties in Inceptisol of Varanasi,

Uttar Pradesh, India

Hanuman Prasad Parewa, 1, 2* Janardan Yadav 2 and Amitava Rakshit 2

1 College of Agriculture, (Agriculture University, Jodhpur) Sumerpur, Pali, Rajasthan, INDIA.

2 Department of Soil Science & Agricultural Chemistry, Institute of Agricultural Sciences, BHU, Varanasi, Uttar Pradesh,

INDIA.

*Corresponding author: haniparewa@gmail.com

Paper No. 237

Received: August 12, 2014

Accepted: August 25, 2014

Published: September 4, 2014

Abstract

A field experiment was conducted during Rabi seasons of 2009-10 and 2010-11 at the Agricultural Research Farm, Banaras Hindu University,

Varanasi (U.P.) to study the effect of fertilizer levels, FYM and bioinoculants and their interaction effect on soil properties. The treatments

consisted four levels of recommended dose of fertilizer (0, 50, 75 and 100% NPK), two levels of farmyard manure (0, 10 t ha -1 ) and four

inoculation [no inoculation, PGPR ( Azotobactor chroococum W5 + Azospirillum brasilence Cd + Pseudomonas fluorescens BHU PSB06

+ Bacillus megaterium BHU PSB14), VAM (vesicular arbuscular mycorrhiza) and PGPR+VAM]. The experiment was replicated thrice in

a split plot design. The results revealed that application of different treatments did not affect the pH, EC and bulk density decreased, water

holding capacity, organic carbon and CEC significantly improved after harvest of wheat. The dehydrogenase, phosphatase enzyme activity

and soil microbial biomass carbon (SMBC) and available N, P and K and microbial population of soil after the harvest of wheat were

improved significantly due to the integration of inorganic fertilizers with FYM and bioinoculants. Positive impact of biological and organic

manure application have been recorded with an additional advantage of reduction of chemical fertilizer use.

Highlights

Physical, chemical and microbial properties of soil were improved by combined application of fertilizer levels, FYM and

bioinoculants over control.

Combined application of 75% NPK fertilizer, FYM @ 10 t ha -1 and bioinoculants emerged as an viable alternative for sustainable

maintenance of soil fertility, plant nutrient and wheat productivity

Keywords : PGPR, FYM, enzyme activity, SMBC

The integrated nutrient management advocates balanced

desired crop productivity. Fertilizers are very important

and conjoint use of inorganic fertilizer, organic manure,

sources of plant nutrients for increasing agricultural

(Rakshit et al., 2008) green manure and biofertilizer in

production. The inorganic fertilizer could supply only

order to maintenance or adjustment of soil fertility and

one, two or three nutrients but integrated use of inorganic

plant nutrient supply to an optimum level for sustaining

fertilizers, FYM and bioinoculants would provide N, P,