Effectuality of Azotobacter inoculation on wheat (Triticum aestivum L.) grown under diverse nitrogen regimes
2022
Davinder Singh | Jayesh Singh | Achla Sharma | Anu Kalia
The present investigation was conducted at the research farm of wheat Section, Department of Plant Breeding& Genetics, Punjab Agricultural University, Ludhiana during rabi 2014-15 and 2015-16 in split plot designwith three replications. The treatments included inoculation of seed and soil with Azotobacter besidesthe uninoculated control as check in main plots and different levels of recommended nitrogen (0, 50, 75 and100% of recommended nitrogen) in sub plots. The seed of wheat when inoculated with Azotobacter recordedsignificantly highest growth attributes at maturity viz. plant height (82.6 cm), tiller density (320.9), drymatter accumulation (94.0 q/ha), LAI (3.32), PAR interception (79.6% and chlorophyll content (2.03 mg/g offresh wt.). The trend for soil inoculation was similar to that of seed inoculation but the values of the abovesaid parameters were either equivalent or a bit lower than that recorded for seed inoculation. The grainyield (48.0 and 47.3 q/ha) and quality in terms of protein content (11.49 and 11.34%) of wheat on inoculationwith Azotobacter (either seed or soil respectively) also improved over uninoculated plot. Among the nitrogenlevels (100%, 75% and 50% of recommended N), application of 100% recommended nitrogen resulted insignificantly higher growth than other levels of nitrogen in terms of plant height (92.8 cm), tiller count(366.8), dry matter accumulation (104.8 q/ha), LAI (3.89), PAR interception (89.0%), chlorophyll content(2.34 mg/g of fresh weight) and also productivity in terms of grain yield (56.3 q/ha) The quality of wheat interms of protein (11.84%) and gluten index (77.12) also improved with application of 100% recommendednitrogen
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