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RESPONSE OF CANDIDATE WHEAT VARIETY ‘NIA-8/7’ TO DIFFERENT LEVELS/RATIOS OF NITROGEN AND PHOSPHORUS
MUHAMMAD YOUSUF MEMON, PARVEZ KHAN*, MUHAMMAD IMTIAZ, JAVAID AHMED SHAH AND NIZAMUDDIN DEPAR
Abstract:
Field experiments
were conducted for two consecutive years (2007-08 and 2008-09) to evaluate the response of a candidate wheat variety
NIA-8/7 to different ratios of nitrogen and phosphorus. Four levels of N
(0, 120, 150 and 180 kg ha-1) and nine levels of P2O5
(0, 30, 40, 45, 60, 75, 90, 110 and 135 kg ha-1) along
with 60 kg K2O ha-1 in 10 combinations were
employed in 4:1, 4:2 and 4:3 N:P2O5 ratios. The
results showed that the grain yield increased significantly (P <0.05)
with fertilizer levels up to 150 kg N, and 110 kg P2O5
ha-1. The differences in grain yield at 150:110 and
180:135 levels of N: P2O5 were not significantly
different with each other during both years. Yield traits viz., spike
length, number of grains per spike and 100-grain weight were higher at
150:110 kg N and P2O5 ha-1 as compared
with other treatments. The test genotype NIA-8/7, produced significantly
highest yield (5417 kg ha-1) at 150 kg N and 110 kg P2O5
ha-1, therefore, it is observed that it could be adopted as
the most economical dose for obtaining the maximum yield from
this wheat genotype under the agro-climatic conditions of Sindh.
Soil Science Division, Nuclear Institute of Agriculture,
Tando Jam -70060, Pakistan
*E-mail:
parvez_08@yahoo.com
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