Response of barley to fertilizer levels and different combinations of biofertilizers
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Date
2018
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CCSHAU
Abstract
The present study entitled, “Response of barley to fertilizer levels and different combinations
of biofertilizers” was conducted during the Rabi season of 2015-16 and 2016-17 at the Agronomy
research farm of Chaudhary Charan Singh Haryana Agricultural University, Hisar .The experiment
was laid out in split plot design with three fertilizer levels (50, 75 and 100 per cent RDF) in main plots
and seven different combinations of biofertilizers (Uninoculated, seed inoculation with Azotobacter,
Azospirillum, PSB, Biomix, Azotobacter+PSB and Azospirillum+PSB) in sub plots replicated thrice.
Based on the research investigation it was found that significantly taller plants, higher dry matter
production and Leaf area index were recorded with the application of 100 % RDF than lower fertilizer
levels (50 and 75 % RDF). Increasing levels of fertilizer resulted in significant higher yield attributes
(number of spikes per meter row length, more number of grains per spike and test weight) and yield
(grain, straw and biological yield) of barley. However, plant population, harvest and attraction index,
quality parameters (Proportion of thin and bold grains percentage and hectoliter weight), canopy
temperature of barley and available nutrient status of soil (N, P and K) after the harvest of barley were
statistically similar under all the fertilizer levels. While malt content of barley decreased significantly
with increase in fertilizer levels during both the years of experimentation. Application of 100 % RDF
recorded significantly higher protein content, NDVI value of barley, N content and N, P and K uptake
in grain and straw, net returns, gross returns and benefit: cost ratio than the lower fertilizer levels (50
and 75 % RDF).
Among different combinations of biofertilizers, seed inoculation with Biomix recorded
significantly higher plant height, dry matter accumulation, LAI, all the yield attributes (number of
spikes per meter row length, number of grains per spike and test weight), grain, straw, biological
yield, protein content, N content in grain , P content in grain in the year 2015-16, N, P and K uptake
in grain and straw, higher gross returns, net returns and benefit: cost ratio of barley during both the
years of experimentation . But harvest index, proportion of thin and bold grains percentage, hectoliter
weight, malt content, canopy temperature, NDVI value of barley, P content in grain in 2016-17 and K
content in grain and N, P and K content in straw and available N, P and K status of soil after the
harvest of barley did not differ significantly due to seed inoculation with different combinations of
biofertilizers during both the years of experimentation. Seed inoculation with Biomix in association
with 75 % RDF was found to be significantly superior in terms of grain and straw yield of barley.
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