Role of microbial inoculants on performance of rock phosphate in aerobic rice (Oryza sativa)
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Authors
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Devideen Yadav
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Y.V. Singh
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Komal Yadav
Keywords:
Aerobic rice, Arbuscular mycorrhizal fungi, Phosphorus solubilising bacteria, Rock phosphate, Soil health, Water productivity.Abstract
Performance of rock phosphate (RP) inoculated with phosphorus solubilising bacteria (PSB) and
arbuscular mycorrizal fungi (AMF) was evaluated in terms of water productivity, biological health
and available nutritional status of soil under aerobic rice (Oryza sativa L.) at ICAR- Indian Agricultural
Research Institute (IARI), New Delhi, during Kharif-2013. Results revealed that application of RP
inoculated with PSB and AMF enhanced irrigation water productivity by 16.1%, dehydrogenase
activity (DHA) by 54.9%, alkaline phosphatase activity (APA) by 18.9% and microbial biomass carbon
(MBC) by 64.3% over sole RP with same rate of application. Available nitrogen (N), phosphorus (P)
and potassium (K) status of soil were also improved by applying 30 kg P through RP inoculated
with PSB and AMF over 30 kg P through sole RP.