National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Phosphorus plays a significant role in several physiological and biochemical activities in plants. Phosphorus in soils is immobilized due to formation of insoluble complexes such as iron and aluminium hydrous oxides and calcium carbonate. Phosphate-solubilizing microorganisms (PSM) play an important role in insoluble phosphates into soluble forms involves processes of acidulation, ion chelation and exchange reactions. Present study, a field experiment was carried out to study the physiological and yield response of phosphate solubilising inoculants (JumpStart) on rice variety CO 47 under machine transplanting rice ecosystem. The present study revealed that the treatment P3S3 (100% P + JumpStart 10E5) was recorded increased total chlorophyll (3.03 mg g-1) and higher leaf carbohydrate (82.06 mg g-1) at 50% flowering stage. The lower enzyme activity of acid phosphatase (0.022 µmol of pNPP g-1 min-1) and ATPase (29.37 µg of Pi g-1 h-1) were recorded by treatment P3S3 (100% P + JumpStart 10E5) over control at 50% flowering stage. The uptake of phosphorus by plants was found higher in P3S3 treatment observed at all stages of crop growth. At 50% flowering stage, phosphorus (69.26 kg ha-1), uptake were observed higher in P3S3 treatment than control. The maximum grain yield of 8426 kg ha-1 was registered by P3S3 (100% P + JumpStart) with an increase of 16.4 per cent over control. This might be due to the significant increment of major yield components such as number of productive tillers per plant, panicle dry weight and number of grains per panicle by the application of 100 % recommended phosphorus with seed treatment of JumpStart 10E5.
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