Nitrogen management and lopping schedule for optimization of crop growth, grain yield and quality of October sown dual purpose malt barley (Hordeum Vulgare L.)
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Date
2016
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Punjab Agricultural University, Ludhiana
Abstract
The field experiment entitled “Nitrogen management and lopping schedule for optimization
of crop growth, grain yield and quality of October sown dual purpose malt barley (Hordeum
vulgare L.)” was conducted on loamy sand soil, low in organic carbon and available nitrogen,
high in phosphorus and medium in potassium at Student's Research Farm, Department of
Agronomy, Punjab Agricultural University, Ludhiana. Experiment was laid out in randomized
complete block design with nine treatments i.e. no lopping with application of whole nitrogen
(N) at sowing (L0N1) and other eight treatments included combination of two lopping
schedules (50/60 DAS) and four N application modules viz. application of whole N at sowing
(L50/L60N1); half at sowing + ½ after first irrigation (L50/L60N2); ¼ at sowing + ¼ after first
irrigation + ½ after lopping (L50/L60N3); ¼ after first irrigation + ¾ after lopping (L50/L60N4)
replicated four times. The uncut crop fertilized with whole N at sowing (L0N1) attained
significantly higher plant height, number of effective tillers and dry matter at harvest. The
highest green and dry fodder yield was recorded from the crop lopped 60 days after sowing
fertilized with whole N at sowing (L60N1) than crop lopped 50 days after sowing under all N
modules but was at par with L60N2. Crop lopped 50 days after sowing (L50N1) produced
fodder of superior quality in terms of crude protein, total ash and digestibility (in-vitro) over
the crop lopped 60 days after sowing (L60N1) but had higher nitrate nitrogen content than the
later treatment. The highest grain and straw yield was obtained from the uncut crop fertilized
with whole N at sowing (L0N1) but the grain yield of uncut crop was at par with L50N3 and
L50N4. Crop lopped 50 days after sowing as fodder and fertilized in two splits (L50N2) gave
highest net returns among all the treatments.
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Keywords
barley, lopping schedule, nitrogen management