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Effects of plant growth promoting rhizobacteria and NPK fertilizers on biochemical and microbial properties of soils under ginger (Zingiber officinale Rosc.) cultivation

DSpice at Indian Institute of Spices Research

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Field Value
 
Creator DINESH, R
ANANDARAJ, M
KUMAR, A
SRINIVASAN, V
BINI, Y K
SUBILA, K P
ARAVIND, R
HAMZA, S
 
Date 2013-07-20T16:20:24Z
2013-07-20T16:20:24Z
2013
 
Identifier Agricultural Research Vol. 2(4) 346-353 (2013)
http://hdl.handle.net/123456789/1049
 
Description For the study, plant growth promoting rhizobacteria (PGPR) were isolated from soils under ginger and shortlisted based on their nutrient mobilization traits. The promising isolates (Burkholderia cepacia, Klebsiella sp. Serratia marcescens and Enterobacter sp.) were either applied alone or in combination with varying rates of NPK fertilizers to determine their effects on sensitive biochemical and microbial properties of soils under ginger (Zingiber officinale Rosc.). The properties studied were soil organic carbon (SOC), dissolved organic- C (DOC) and –N (DON), microbial biomass-C (CMIC), -N (NMIC) & -P (PMIC), net N mineralized (NMIN), soil respiration (SR), metabolic quotient (qCO2) and activities of dehydrogenase (DHA), acid phosphatase (AcP), β-glucosidase (βG) and urease (UR). Results revealed a 24% increase in mean DOC level in treatments with PGPR + NPK compared to control. Similarly, mean CMIC and NMIC levels were greater by 27% and 71% respectively in treatments involving PGPR + NPK compared to treatments with only fertilizers. Also, combined application of PGPR and fertilizers positively influenced PMIC and NMIN rates compared to sole application of PGPR or NPK. While SR did not vary considerably among the treatments, qCO2 levels across PGPR + NPK treatments were lower by 15-20 % relative to treatments with only NPK or PGPR. Results also revealed that DHA activity was on an average greater by 49.0%, UR by 15%, AcP by 40% and βG by 35% in PGPR + NPK treatments compared to only NPK.
 
Format 231936 bytes
application/msword
 
Language en
 
Publisher Springer India
 
Subject Soil microbial biomass
Soil enzyme activity
Soil respiration
Metabolic quotient
 
Title Effects of plant growth promoting rhizobacteria and NPK fertilizers on biochemical and microbial properties of soils under ginger (Zingiber officinale Rosc.) cultivation