EFFECT OF ORGANIC AND INORGANIC NUTREINTS ON THE YIELD AND QUALITY OF OKRA
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Date
2006
Authors
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ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD
Abstract
A field experiment was conducted during hot weather period, 2006 on
sandy loam soils of orchard block, Agricultural College Farm, Bapatla to study
the effect of both organic and inorganic fertilisers on Okra. The experiment
was laid out in Randomised block design with three replications.
An increase in vegetative growth was observed with 25 per cent NPK +
vermicompost + Azospirillum . Maximum plant height was observed with the
above treatment. This was on par with the treatment 25 per cent NPK + FYM
+ Azospirillum. Number of nodes was also maximum with the above treatment.
Days to 50 per cent flowering was observed early with 25 per cent NPK
+ vermicompost + Azospirillum i.e., 44.66 days. Maximum number of days to
50 per cent flowering was observed with unfertilized control. Manure applied
at 50 percent levels, recorded comparatively early flowering than manure and
organic alone.
Fruit length, weight and volume exhibited superior results with the
treatments receiving 25 per cent NPK + vermicompost + Azospirillum which
was on a par with that of 25 per cent NPK + farm yard manure + Azospirillum.
Sole inorganic and organic treatments recorded reduced results compared to the
combined effect of organic and inorganic fertilizers.
There was not much difference among the treatments in 100 seed weight.
However 25 per cent NPK + vermicompost + Azospirillum recorded maximum
100 seed weight. This was on par with 25 per cent NPK + Farmyard manure +
Azospirillum. The lowest 100 seed weight was recorded with unfertilized
control. Maximum number of seeds per fruit was observed with the above
treatment. Pure inorganic fertilizers resulted better than pure organic manures.
Maximum number of fruits per plant was recorded with T2 treatment
receiving pure inorganic nutrients followed by T6 treatment receiving 50%
farmyard manure+50% RDF.
Fruit yield was maximum with treatment receiving 25 per cent NPK +
vermicompost + Azospirillum which was on par with 25 per cent NPK + FYM
+ Azospirillum. Treatment receiving pure organic treatments recorded lesser
fruit yield compared to combination of both organic and inorganic fertilizers.
Leaf area and leaf area index was maximum with these treatments. NAR
increased upto 60 days and thereafter the growth decreased and was ready for
harvest.
Drymatter content increased with the crop growth. Maximum drymatter
content was observed with 25 per cent NPK + vermicompost + Azospirillum
and was on par with 25 per cent NPK + FYM + Azospirillum.
The nitrogen uptake was maximum with T2 treatment receiving sole
inorganic nutrient. Phosphorus and potassium uptake was maximum with 25
per cent NPK + Farm yard manure + Azospirillum and was followed by T2
treatment receiving sole application of inorganic fertilizer . Least uptake was
observed with unfertilized control.
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Keywords
EFFECT, ORGANIC, INORGANIC, NUTREINTS, YIELD, QUALITY, OKRA