| Popis: |
The present study is focused on improving the growth and phosphate uptake of leafy vegetables by supplying phosphate bioinoculants. For the study of plant growth and phosphate uptake in leafy vegetables, a total of 41 PSF were isolated, from the 50 rhizosphere soil samples through a serial dilution method using Pikovskaya’s medium. Among them, 6 PSF were selected with maximum solubilization index (3.08 to 3.86) and further evaluated their phosphate solubilization ability under laboratory and field conditions. The selected 6 PSF showed good results in decreased pH (4.0 to 3.1 from initial pH of 6.89), titrable acidity (30.16g/L to 38.08g/L), and concentration of phosphate in culture broth was (60µg to 25µg). With these results, the PSF bio inoculants were prepared and treated with selected seeds of methi and palak under field trials. Among the selected six PSF, PSF 39 (Penicillium oxalicum) showed maximum plant growth and yield in methi, the parameters including plant height and number of leaves (7.8cm, 15 leaves at 15 days after sowing and 10.1cm, 21 leaves at harvest), root length (5.5cm), biomass (2.11g of fresh weight and 1.01g of dry weight) and yield of leafy vegetable (2.01g). The maximum plant phosphorus uptake was recorded in plants (0.393%) and maximum P (Kg/ha) available in the rhizosphere soil was recorded (346.96Kg/ha). PSF 38 (Aspergillus japonicus) showed maximum plant growth and yield in palak, the parameters including plant height and number of leaves (15.7cm, 8 leaves at 15 days after sowing and 30.6cm, 11 leaves at harvest), root length (10.9cm), biomass (11.23g of fresh weight and 3.82g of dry weight) and yield of leafy vegetable (10.32g). The maximum plant phosphorus uptake was recorded in plants (0.369%) and maximum P (Kg/ha) available in the rhizosphere soil was recorded (346.29 Kg/ha). |
