TAILIEUCHUNG - Effect of phosphorus solubilizers on enzymatic activity and microbial parameters in the soil

An experiment was carried out in the Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani during 2017-18 in order to evaluate the effect of phosphate solubilizers on the activity of different enzymes and microbial parameters in the soil and its impact on crop growth and yield of test crop tomato var. Vellayani Vijai. The experiment was laid out in a randomized block design with fourteen treatments and three replications. Treatments were the combinations of four doses of P (100%, 75%, 50%, 25%) along with P solubilizers (AMF, Pseudomonas, and Bacillus.). From the study, an increasing activity of dehydrogenase was observed over a period of four months. At the harvesting stage, the highest value of μg of TPF released g -1 was observed in the treatment T3 (75% P +AMF). It was observed that the activities of acid and alkaline phosphatase were significantly influenced by the treatment at 2, 3 and 4 MAP. An increasing trend of acid phosphatase was observed up to 3MAP followed by a decline. At 4MAP, the highest value of μg of p-nitrophenol released g-1 of soil 24 h-1 was observed in T11 (PSB). From the study, it was observed that the treatment did not impose any significant effect on the activity of urease upto 3 MAP. However, an increasing trend of urease enzyme over a period of 4 months is noticed. The highest activity was noticed with the application of 50% P and AMF ( ppm of urea hydrolysed g -1 ). Regarding MBC, the treatment T9 (25% P + AMF) registered the highest value of 380 μg g-1 soil where the treatment T5 (50% P + PSB) recorded the highest MBP content of μg g-1 soil. The highest value for MB C/P was recorded by the treatment T14 (Absolute control) (). Microbial load of P solubilisers was found to be high in the treatment T5 (50% P + PSB) with average value of log cfu g-1 . | Effect of phosphorus solubilizers on enzymatic activity and microbial parameters in the soil

• Nông nghiệp
• Microbial inoculants
• Acid phosphatase
• Alkaline phosphatase
• The soil
• Microbial parameters in the soil
• Enzymatic activity
• Bacillus subtilis NRCSS 1
• Quality standards
• Microbial inoculants as biofertilizer
• Quality assessment of microbial inoculants
• Soil microorganisms
• Growth hormones
• Microbial and organic formulations
• Baby corn (Zea mays L )
• Green house condition
• Microbial inoculants for production
• Carrier materials
• Growth pattern
• IAA production
• Different formulation for mass production
• Characterization of microbial inoculants
• Rock phosphate
• Enriched compost
• Soil nutrients
• Phosphorus uptake by rice
• Sustainable agriculture
• Chemical fertilizer and microorganism
• Food production
• Adverse effects on soil richness
• Plant growth promoting rhizobacteria
• Phosphorus solubilizing bacteria
• Trichoderma viride
• Seed treatment
• Different microbial inoculants
• Chemical properties
• Nutrient availability
• Soybean grown on Vertisol
• Soil using microbial cultures
• Nutrient availability in soil
• Fatty acids
• Fermentation biotechnology
• Grass silage
• Lactic acid bacteria
• Polyunsaturated fatty acids
• Biomass ratio
• Green manure
• Kharif Maize
• Microbial communities
• Soil enzymes
• Green manures
• Chemical fertilizers
• Impact of different sources
• Organic nutrients
• Soil under irrigated condition
• Direct seeded rice
• Phosphorus fertilization
• Phosphorus fertilization effects
• Growth parameters
• Liquid biofertilizers
• Precision farming system
• Rhizobium and PSB
• Yield performance of greengram
• Bio fertilizers
• Approaches in flower crops
• Integrated nutrient management
• Soil inoculation
• Crop residue
• Enzyme activity
• Maize under maize wheat cropping system
• Residue retention
• Fluorescein diacetate activity