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EFFECT OF NITROGEN AND POTASSIUM ON GROWTH AND YIELD OF HYBRID RICE

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Title EFFECT OF NITROGEN AND POTASSIUM ON GROWTH AND YIELD OF HYBRID RICE
 
Creator ARIVAZHAGAN, S
 
Contributor BUCHA REDDY, B
 
Subject EFFECT, NITROGEN, POTASSIUM, GROWTH, YIELD, HYBRID, RICE
 
Description An investigation entitled “Effect of nitrogen and potassium on growth and
yield of hybrid rice” was conducted at Agricultural College Farm, Rajendranagar,
Hyderabad during kharif, 2000. The experiment was laid out in split plot design
with three rice cultivars (two hybrids and one variety) in main plot and ten
treatment combinations of nitrogen and potassium management in sub plots
replicated thrice.
Plant height, leaf area, number of tillers m-2, Dry Matter Production (DMP),
productive tillers m-2, panciles hill-1, total and filled spikelets panicle-1, spikelet
sterility, grain and straw yield and NPK uptake by crop were significantly higher in
hybrid rices than variety IR64. The two rice hybrids APHR-2 and DRRH-1 were
similar in height, leaf area and filled spikelets panicle-1 while tillers m-2, DMP,
productive tillers m-2, panicles hill-1, grain and straw yield and NPK uptake were
significantly higher in hybrid APHR-2 than that of DRRH-1. Hybrid DRRH-1
recorded significantly higher total spiklets panicle-1 and spikelet sterility (%)
however, 1000 grain weight and available NPK were significantly more with
variety IR64. Significantly higher net returns were observed with rice hybrid
APHR-2 while benefit cost ratio was significantly higher with variety IR64. The growth, yield attributes, grain and straw yield, net returns and nutrient
uptake were comparable in the crop that received 150 kg N and 40 kg K2O ha-1 at
TP + 2% KCl FA once, 150 kg N and 20 kg K2O ha-1 each at TP and PI and 120 kg
N and 40 kg K2O ha-1 at TP + 2% KCl FA once and significantly superior to 150 kg
N and 0 kg K2O ha-1 and 120 kg N and 0 K2O ha-1, which were significantly lower
to all the treatments
There was no significant increase in yield beyond 120 kg ha-1. Irrespective
of N levels, significantly higher grain yield was obtained where, K management
either with 40 kg K2O ha-1 as basal in addition with foliar application of 2% KCl
one week after heading or 40 kg K2O ha-1 in two splits at TP and PI stages, as
compared to 40 kg K2O ha-1 as basal. There was significant increase in yield with
application of 40 kg K2O ha-1 and less than that led to significant yield reduction
either in 20 kg K2O ha-1 coupled with foliar application twice at 20 days prior and
one week after heading or no potassium application.
 
Date 2016-08-22T13:19:43Z
2016-08-22T13:19:43Z
2003
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/73282
 
Language en
 
Relation D6962;
 
Format application/pdf
 
Publisher ACHARYA N.G. AGRICULTURAL UNIVERSITY RAJENDRA NAGAR, HYDERABAD - 500 03 0