Study on nitrogen metabolism under the influence of different planting dates in oat (Avena sativa L.)
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Date
2020
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Punjab Agricultural University, Ludhiana
Abstract
The current investigation was carried out to evaluate the effect of staggered planting dates
(Oct 9, Oct 24, Nov 13, Nov 26, Dec 11 and Dec 26) and growth stages (40, 50 and 60 DAS)
in oat through field experiment during Rabi season using two genotypes. The OL-10 is a fast
growing genotype with high regeneration potential and OL-11 is relatively slow growing
single cut variety. The activities of nitrate reductase and nitrite reductase were observed high
during optimum (Oct 24) and sub-optimum (Oct 9 and Nov 13) planting dates but low during
late planting dates (Nov 26, Dec 11 and Dec 26). The activities of glutamine synthetase,
glutamate synthase, glutamate dehydrogenase, glutamate oxaloacetate transaminase and
glutamate pyruvate transaminase were observed high during late planting dates but were
stable or slightly low at optimum and sub-optimum ones. The optimum and sub-optimum
planting dates were also characterized by higher total chlorophyll, dry matter (DM), ash,
crude fat, acid detergent fibre (ADF) and neutral detergent fibre (NDF) content in comparison
with late planting dates. Crude protein, non-protein crude protein, in vitro dry matter
digestibility, nitrate-N, nitrite-N and free amino acids increased with delay in planting dates.
Meanwhile, the quality attributes of the oat except DM, ADF, NDF and free amino acids got
declined with advancing maturity of vegetative fractions of plant. Furthermore, yield and
yield attributes got declined with delay in planting time. Overall, OL-10 had higher nitrogen
assimilation potential, nutritive value and yield potential as compared to OL-11 genotype.
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Citation
Aanchaldeep Kaur (2020). Study on nitrogen metabolism under the influence of different planting dates in oat (Avena sativa L.) (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.