Gosal, S.K.Dhanjal, Sukhmani2018-01-182018-01-182017http://krishikosh.egranth.ac.in/handle/1/5810039551A pot experiment was carried out to study the effect of biofertilizers and inorganic fertilizers on soil health and growth of Eucalyptus clone 413. Significantly higher bacterial population (190 × 108 CFU/g of soil), PGPR population (86 ×105 CFU/g of soil) and soil dehydrogenase activity (8.83μg TPF formed/hr/g of soil) was observed in treatment having consortium + N100P100 while the maximum fungal population (22 ×104 CFU/g of soil) and diazotrophic population (89 ×105 CFU/g of soil) was found in treatments having Azotobacter inoculation. PSB population (48 ×104 CFU/g of soil) and soil alkaline phosphatase activity (3.01 μg pNP formed/ h /g of soil) was observed to be maxmum in treatment having PSB inoculation. Actinomycetes population and urease activity showed varying trend as actinomycetes population (48 ×105 CFU/g of soil) was observed to be significantly higher in control and urease activity (394.6 μg urea hydrolysed/ hr/ g of soil) in treatment having consortium + N100P100. Soil organic carbon (0.33%) and available N (171.34 Kg/ha), P (21.0 Kg/ha), K (152.4 Kg/ha) were found to be significantly higher in treatment having consortium + N100P100. Significantly higher plant N( 1.20 g/plant) and K (0.92 g/plant) uptake was found in treatment having Azotobacter + N100P100 while, plant P uptake(0.22 g/plant) was highest in treatment having consortium + N100P100. Plant growth parameters viz root shoot biomass, leaves, branches and root shoot length were found to be significantly higher in treatment having Azotobacter + N100P100while, collar diameter was found to be highest in consortium + N100P100. The present study was also done by using two cultures of Glomus fasiculatum as AM1 and AM2. Significantly higher bacterial population (138 × 108 CFU/g of soil), PSB population (86 ×105 CFU/g of soil), diazotrophic population(58 ×105 CFU/g of soil), soil dehydrogenase activity (7.67 μg TPF formed/hr/g of soil) and alkaline phosphatase activity (3.01 μg pNP formed/ h /g of soil) were observed in treatment having AM1 and inorganic fertilizer combinations while, the maximum fungal population (24 ×104 CFU/g of soil) and PGPR population (64 ×105 CFU/g of soil) was found in treatments having AM2 and inorganic fertilizer combinations. Actinomycetes population and urease activity showed varying trend and urease activity (367.7 μg urea hydrolysed/ hr/ g of soil) in treatment having AM2 + N-100% P-100%. Soil organic carbon (0.33%), available K (144.7 Kg/ha) and plant K uptake (0.83 g/plant) were found to be significantly higher in treatment having AM2 and inorganic fertilizers combinations while significantly higher available N (162.9 Kg/ha), available P (18.6 Kg/ha), plant N (0.92 g/plant) and plant P (0.14 g/plant) uptake were found in treatment having AM1 and inorganic fertilizer combinations.. Plant growth parameters viz root shoot biomass, leaves, branches and collar diameter were found to be significantly higher in treatment having AM2 and inorganic fertilizer combinations while, root and shoot length was found to be highest in AM1 and inorganic fertilizer combinations. Hence the combined effect of biofertilizers and inorganic fertilizers boost the soil health and growth parameters of Eucalyptus.ennullThesis