Bio-decomposer and nitrogen management in super seeder sown wheat (Triticum aestivum l.) after combine harvested rice
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Date
2022-10
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G. B. Pant University of Agriculture and Technology, Pantnagar
Abstract
Field experiments entitled “Bio-decomposer and nitrogen management in super seeder sown wheat (Triticum aestivum L.) after combine harvested rice” were conducted in B-1 block of Norman E. Borlaug Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar (Uttarakhand) during 2020-21 and 2021-22. The experiments aimed the to study effect of bio-decomposer nitrogen dose and its scheduling on initial growth and productivity of wheat, properties of soil and weed densities and biomass and economics of different treatments. Field experiment was laid in split plot design with two factors in the main plot viz. without and with application of bio-decomposer and Nitrogen level @150 and @80 kg/ha and three nitrogen splits viz. 50%:25%:25%, 40%:30%:30% and 30%:35%:35% and replicated thrice. Bio-decomposer
was prepared and sprayed prior 5 days before sowing of the wheat crop. The variety (PBW-373) was used during the study. Emergence was not influence by various factors whereas, growth parameters i.e., plant height, no. of shoot/m2, dry matter accumulation were recorded significantly higher in treatment receiving nitrogen @180 kg/ha and split as 50%:25%:25% which was at par with 40%:30%:30% over 150 kg N/ha and split as 30%+35%+35% during both the years of study. Application of decomposer did not influence the growth parameters. Yield attributes such as spike length and 1000-grains weight were not influence by different factors whereas effective tillers/m2, no. of grains/spike and grain weight/spike were recorded significantly higher in in treatment receiving additional nitrogen i.e., 180 kg/ha and split as 50% as basal which was at par with 40%:30%:30% over recommended dose @150 kg N/ha and split as 30%:35%:35% during both the years of study. Harvest index was not influence by different factors while grain yield, straw yield and biological yield were recorded significantly higher in nitrogen @180 kg/ha and split as 50%:25%:25% which was at par with 40%:30%:30% over 150 kg N/ha and split as 30%:35%:35% during both the years of study. Non-significant effect was observed in bio-decomposer application in all the above parameters although higher values were recorded with bio-decomposer application than without its application. Bulk density, soil pH and EC were not affected by various factors. P and K were not affected by various factors except P was significantly influence by application of decomposer. While N was significantly affected by different factors. Significantly higher net returns and B: C ratio was recorded with nitrogen @180 kg/ha and split as 50%:25%:25% over 150 kg N/ha and split as 30%:35%:35%. The magnitude of increase was 11.4, 10.3 and 15.3, 18.8% respectively, during both the years of study. Bio-decomposer did not influence net returns and B:C ratio, although, higher values were recorded with the application of bio-decomposer than without the decomposer.