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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(12): 355-365
DOI: https://doi.org/10.20546/ijcmas.2017.612.043


Effect of Biofertilizer and Integrated Nutrient Management on Growth of Potato and Soil Microbial Activity
R. Chutia1*, P.C. Bhagawati1 and D.J. Nath2
1Department of Agronomy, 2Department of Soil Science,Assam Agricultural University, Jorhat­785013, India
*Corresponding author
Abstract:

Integrated nutrient management through bio­fertilizers, organic fertilizer and chemical fertilizers can sustain soil quality and improve plant growth. A field experiment titled “Effect of Biofertilizer and Integrated Nutrient Management on Growth of Potato and Soil Microbial Activity” was conducted during rabi seasons of 2014­15 and 2015­16 at the instructional cum research farm of Assam agricultural university. The experiment consisting of eight treatments viz., 100% recommended dose of Nitrogen (T1), 75% recommended dose of Nitrogen+ 25% Nitrogen through Enriched Compost (T2), 75% recommended dose of Nitrogen+ 25% Nitrogen through Vermicompost (T3), 50% recommended dose of Nitrogen+ 50% Nitrogen through Enriched Compost (T4), 50% recommended of Nitrogen + 50% Nitrogen through Vermicompost (T5),50% recommended dose of Nitrogen + 25% Nitrogen through Enriched Compost + 25% Nitrogen through Vermicompost (T6), 50% recommended dose of Nitrogen + 25% Nitrogen through Enriched Compost (T7) and 50% recommended dose of Nitrogen + 25% Nitrogen through Vermicompost (T8) was laid out in randomized block design with three replications. The soil of the experimental site was sandy loam in texture, acidic (5.66) in reaction, medium in organic carbon (0.72%), available N (290kg/ha), P2O5 (25.78kg/ha) and K2O (270.89kg/ha).Soil physico­chemical characters at harvest of potato were significantly influenced by INM practices of which T6 (50% recommended dose of Nitrogen + 25% Nitrogen through Enriched Compost + 25% Nitrogen through Vermicompost) recorded the highest values for all the soil parameters viz., soil pH (5.58 and 5.62), soil organic carbon (SOC) (0.96 and 1.08%), available N (405 and 548.15 kg/ha), P (23.20 and 23.96 kg/ha) and K (333.89 and 336.55 kg/ha) during both the years of experimentation. Soil biological characters were also found to be statistically superior in respect of microbial biomass carbon (335.55 and 367.41μg g­1 soil), dehydrogenase activity (191.29 and 201.19 μg TPFg­124hr­1), phosphomonoesterase activity (356.44 and 382.46 μg p-nitrophenol g­1hr­1), fluorescein di­acetate hydrolysis activity (9.22 and 9.26 μg fluorescein g­1 hr­1) at T6 followed by T4 (50% recommended dose of Nitrogen + 50% Nitrogen through Enriched Compost). The Organic carbon showed strong correlation with microbial biomass carbon (r=0.794*), Dehydrogenase (r=0.807**) and Available N (r=0.700*). Similarly the enzyme phosphomonoesterase established significant correlation with Available P2O5 (r=0.668*) indicating the role of enzyme in releasing the P from organic sources.


Keywords: Biofertilizer, Soil microbial biomass carbon, Dehydrogenase activity, Phosphomono esterase activity (PMEase activity), Fluorescein di­acetate, Enriched compost, Vermicompost.
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How to cite this article:

Chutia, R., P.C. Bhagawati and Nath, D.J. 2017. Effect of Biofertilizer and Integrated Nutrient Management on Growth of Potato and Soil Microbial Activity.Int.J.Curr.Microbiol.App.Sci. 6(12): 355-365. doi: https://doi.org/10.20546/ijcmas.2017.612.043