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PERFORMANCE OF QUALITY PROTEIN MAIZE (QPM) UNDER VARIED LEVELS OF NITROGEN AND PHOSPHORUS

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Title PERFORMANCE OF QUALITY PROTEIN MAIZE (QPM) UNDER VARIED LEVELS OF NITROGEN AND PHOSPHORUS
 
Creator NANDITA JENA
 
Contributor VANI, K.P
 
Subject nitrogen, maize, yields, grain, proteins, planting, harvesting, crops, fertilizers, protein quality
 
Description A field experiment entitled “Performance of Quality Protein Maize (QPM) under
varied levels of nitrogen and phosphorus” was conducted during kharif, 2012 at College
Farm, College of Agriculture, Rajendranagar, Hyderabad on sandy loam soils (pH of 8.32),
low in organic carbon (0.43%), medium in available nitrogen (309 kg ha-1),
phosphorus(31.23 kg ha-1) and potassium (320 kg ha-1). The treatments comprised of four
levels of nitrogen (0, 120, 180 and 240 kg N ha-1) along with four levels of phosphorus (0,
60, 80 and 100 P2O5 kg ha-1). This experiment consisted of 16 combination of treatments
applied to Quality Protein Maize hybrid (HQPM-1) laid out in a Randomized Block Design
and replicated thrice. The results revealed that, different levels of nitrogen and phosphorus
significantly influenced the growth parameters, yield attributes, yield and protein content of
Quality Protein Maize.
Application of nitrogen significantly influenced the growth parameters, yield
attributes, yield and quality parameters of QPM. The plant height, leaf area index, dry
matter production, number of grains cob-1, cob length, cob girth and 100 grain weight
increased significantly with each increment of nitrogen up to 240 kg N ha-1.
Similarly,applying 100 kg P2O5 ha-1significantly improved the growth parameters,
yield attributes, yield and protein content of QPM compared to lower doses like 60, 80 kg
P2O5 ha-1 and control.
Interaction effect of nitrogen and phosphorus levels of QPM was found to be nonsignificant
on plant height, leaf area index and dry matter production at all growth stages.
Among the four levels of ‘N’ tested, application of 240 kg N ha-1 registered
significantly higher grain yield (6383 kg ha-1) over 180, 120 kg N ha-1 and control. Among
the phosphorus treatments, application of 100 kg P2O5 ha-1 recorded the highest grain yield
(5010 kg ha-1) over 80, 60 kg P2O5 ha-1 and control. Nitrogen × Phosphorus interaction
effect on grain yield and stover yield was non-significant. Application of 240 kg N ha-1
recorded the highest stover yield (7050 kg ha-1) over 180, 120 kg N ha-1 while, the lowest
stover yield (2198 kg ha-1) was observed in unfertilized plots. Application of 100 kg P2O5
ha-1 recorded significantly the highest stover yield (5562 kg ha-1) while, lowest stover yield
was observed with no phosphorus treatments (4378 kg ha-1).
Application of 240 kg N ha-1 resulted in higher harvest index of 47.5% and least
index was recorded with no nitrogen fertilizer (45.3%). Out of four levels of ‘P’, 100 kg
P2O5 ha-1 recorded highest harvest index of 47.3% followed by 80, 60 kg P2O5 ha-1 and
control.
Application of 240 kg N ha-1 and 100 kg P2O5 ha-1 significantly improved the protein
content. Nitrogen × Phosphorus interaction effect on protein content was not significant.
Further, nitrogen ,phosphorus and potassium uptake significantly increased with nitrogen
and phosphorus application up to 240 kg N ha-1 and 100 kg P2O5 ha-1 respectively. Post
harvest soil status was significantly influenced by different nitrogen and phosphorus levels.
Gross monetary returns ( 70,875 ha-1), net monetary returns ( 46,954 ha-1) and B: C
ratio (2.97) was significantly highest with nitrogen (240 kg N ha-1). Similarly crop fertilized
with 100 kg P2O5 ha-1 yielded highest gross returns ( 55,664 ha-1), net returns ( 30,996
ha-1) and B: C ratio (2.22) compared to rest of the treatments.
From this investigation it can be concluded that, out of four levels of N and P tested,
application of 240 kg N ha-1 and 100 kg P2O5 ha-1 was ideal for realizing higher growth
parameters, yield attributes, grain yield, stover yield, protein content and economic returns
apart from maintaining better post harvest soil nutrient status
 
Date 2016-06-13T10:11:30Z
2016-06-13T10:11:30Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67229
 
Language en
 
Relation D9304;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY