IMPACT OF BIO-FUEL PLANTATIONS ON SOIL MICROBIAL COMMUNITIES AND NUTRIENTS STATUS
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Date
2018-07-26
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
Presently the world has been confronted with an energy crisis due to depletion of
fossil fuel reserves this leads to the search for an alternative fuel, such as biofuel. The field
study on impact of bio-fuel plantations on soil microbial communities and nutrients status,
was carried out in Bio-fuel Park, Madenur, Hassan district of Karnataka state India, during
pre and post-monsoon of 2017-2018. With objectives to assess the status of microbial
communities in soils as influenced by bio-fuel species and to compare the influence of
different bio-fuel species on soil nutrient status. Results revealed that Abundance of
microbial Population activities. Total bacteria, Cellulose decomposers, Azotobacter, PO4-
solubilizing microorganism, were found to be significantly higher in pre-monsoon season,
among biofuel species C.inophyllum and S. glacua influences higher and 0-15cm and 30-
45cm Soil depths was recorded higher microbes. In Enzymatic activities was significantly
higher in pre-monsoon and among biofuel species, C. inophyllum A. indica, further in soil
depths 15-30 cm. AMF spore density, show differences between two season, M. latifolia
recorded significantly higher, and 30-45 cm soil depth. SMB in Post-monsoon significantly
recorded high, among the trees species, S. glauca was highest in both Carbon and nitrogen.
In soil chemical, soil pH and EC (Dsm-1) show significantly higher in post-monsoon season
while O.C (%), Available N, P2O5, K2O was recoded significantly higher in pre-monsoon,
in bio-fuel trees higher in C. inophyllum and S. glauca, soil depth was highly at15-30, 0-
15. Microbiologically characters week to best relation-ship in maintaining good soil health
at landscape level. Pre-monsoon and C. inophyllum, S. glauca were positively impacting
microbes and nutrients.
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