Response of new genotype pea (Pisum sativum L. var. hortense) to varying seed rates and fertility levels
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Date
2022-11-17
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Palampur
Abstract
This investigation was carried out at CSK HPKV, Palampur during rabi season of 2021-
22. Twelve treatments combination of three seed rates (60, 75 and 90 kg/ha) and four fertilizer levels
[control, 50% NPK, 100% NPK (50:60:60 kg/ha NPK) and 150% NPK] were evaluated for growth,
development, productivity, soil properties and profitability of a new genotype/line of garden pea. Soil
of experimental field was silty-clay loam in texture and acidic in reaction. The soil was high in
available nitrogen, medium in potassium and phosphorus. Significantly highest plant population/m2
,
plant height and dry matter accumulation/m2 were observed with seed rate of 90 kg/ha. However, dry
matter accumulation/plant was found to be significantly highest with seed rate of 60 kg/ha. The
developmental parameters were not significantly affected by seed rates. Green pod yield, seed yield,
haulm yield, straw yield and biological yield, all were significantly highest with seed rate of 90 kg/ha.
N, P and K content in seed and straw was highest with seed rate of 60 kg/ha. However, with 90 kg/ha
of seed rate had significantly higher N, P and K uptake which was at par with 75 kg/ha. Partial factor
productivity, agronomic efficiency, NPK apparent recovery, all were increased with increasing seed
rate from 60 to 90 kg/ha. Net returns and B: C were significantly higher with 90 kg/ha of seed rate
which was at par with 75 kg/ha. Total output, input and net energy (MJ/ha) was significantly highest
with seed rate of 90 kg/ha. Whereas, energy productivity (kg/MJ) and energy intensity in economic
term (MJ/rupee) was significantly higher with 90 kg/ha of seed rate which was at par with 75 kg/ha.
Amongst fertility levels, 150% NPK had significantly highest plant height, dry matter
accumulation/plant and dry matter accumulation/m2
. However, number of nodules/plant was highest in
50% NPK. Days taken to 50% flowering, pod initiation, first picking, last picking and maturity of
garden peas were significantly higher in the treatment where 150% NPK was applied which was at par
with 100% NPK. The significantly higher green pod yield, seed yield, haulm yield, straw yield and
biological yield, all were recorded with 150% NPK which was at par with 100% NPK. Significantly
higher N, P and K uptake was observed with 150% NPK which was at par with RDF. Partial factor
productivity, agronomic efficiency, NPK apparent recovery and physiological efficiency, all were
decreased with increasing fertility level from 50% to 150% NPK. 150% NPK had significantly higher
net returns and B: C ratio which were found to be at par with RDF. Total input and output energy were
significantly highest with 150% NPK among fertility levels while net energy and energy intensity in
economic terms was significantly higher with 150% NPK which was at par with RDF. Significantly
highest energy productivity was obtained in control and lowest was recorded with 150% NPK.