Impact of Zinc and Silica Solubilizing Bacterial Consortia on Soil Physicochemical Properties, Microbial Population, Chlorophyll Content and Dry Matter Production of Paddy
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Authors
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S. VINOD BABU
Department of Agricultural Microbiology, Advanced Post Graduate Centre, ANGRAU, Lam, Guntur - 522 034, India
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A. VIJAYA GOPAL
Department of Agricultural Microbiology, Advanced Post Graduate Centre, ANGRAU, Lam, Guntur - 522 034, India.
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N. TRIMURTULU
Department of Agricultural Microbiology, Advanced Post Graduate Centre, ANGRAU, Lam, Guntur - 522 034, India
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G. KISHORE BABU
Department of Soil Science, RARS, ANGRAU, Lam, Guntur - 522 034, Andhra Pradesh, India
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S.L. BHATTIPROLU
Department of Plant Pathology, RARS, ANGRAU, Lam, Guntur - 522 034, Andhra Pradesh, India
Keywords:
"Chlorophyll content", "Dry matter production", "Microbial consortia", "Soil properties", "Zinc and silica solubilizing microorganisms"Abstract
Influence of zinc and silica solubilizing bacterial consortia on direct sown paddy was investigated at Agricultural Research Station (ARS), Jangamaheswarapuram, ANGRAU, Guntur, Andhra Pradesh during late Kharif and late Rabi seasons, 2019. Parameters including pH, EC, organic carbon, bacterial, fungal, actinomycetes population, zinc and silica solubilizing bacterial population, chlorophyll ‘a’, chlorophyll ‘b’, total chlorophyll content and dry matter production at different crop growth stages i.e., 45, 90 and 120 days after sowing (DAS) were estimated under field conditions with three replications and 13 treatments. Highest pH (8.2) and highest organic carbon content (0.46) were recorded in T13 {RDF + Zinc isolate from Kurnool Dist., Jupadu Bunglow village soil sample-4 (ZnKJJ-4) & (Zinc isolate from Prakasham Dist., Giddaluru village soil sample–1( ZnPGG-1) + Silica isolate from Kurnool Dist., Pamulapadu village soil sample–1 (SiKPP-1) & Silica isolate from Prakasham Dist., Yerragondapalem village soil sample–3 (SiPYY-3)} at 45 DAS and 120 DAS, respectively. At 90 DAS, the highest soluble salt content EC (0.46 dS m-1) was observed in T13 compared to other treatments. The highest total bacterial, fungal, actinomycetes population (9.96, 5.48 and 6.89 Log CFU g-1 of soil); total zinc solubilizing bacteria (ZnSB) and silica solubilizing bacteria (SiSB) population (6.98 and 6.94 Log CFU g-1 of soil) and highest chlorophyll ‘a’, chlorophyll ‘b’ and total chlorophyll content in leaves (1.26, 0.78 and 2.04, respectively) were observed in T13 at 90 DAS as against other treatments and control. The highest total dry matter production was observed in T13 (13936 kg ha-1) at 120 DAS. In conclusion, zinc and silica solubilizing bacteria and their consortia influenced the soil pH, EC, organic carbon, bacterial, fungal, actinomycetes population, zinc, silica solubilizing microbial population, chlorophyll ‘a’, chlorophyll ‘b’, total chlorophyll content and dry matter production at different crop growth stages in comparison to the individual microorganisms, thus having direct affect on the crop growth and yield.
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