POTASSIUM DYNAMICS THROUGH ORGANIC MANURES AND POTASSIUM SOLUBILIZING BIOFERTILIZER IN OKRA (Abelmoschus esculentus L.)
Loading...
Files
Date
2017
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Acharya N.G. Ranga Agricultural University
Abstract
A field experiment entitled “Potassium dynamics through organic
manures and potassium solubilizing biofertilizer in Okra (Abelmoschus
esculentus L.)” was conducted at Agricultural College Farm, Bapatla during
2016. The test soil was non-saline, sandy loam in texture with neutral reaction.
The soil was low in available nitrogen, medium in phosphorus and high in
potassium status. The available Cu, Zn, Mn and Fe were above their respective
critical limits.
The experiment was laid out in Randomized Block Design (RBD) with
ten treatments replicated thrice. The treatments comprised of T1: RDF; T2: RDF
+ FYM @ 5 t ha-1
; T3: RDF + Vermicompost @ 5 t ha-1
; T4: RDF + Poultry
manure @ 5 t ha-1
; T5: RDNP + 30 kg K2O + FYM @ 5 t ha-1 + K solubilizing
biofertilizer; T6: RDNP + 30 kg K2O + Vermicompost @ 5 t ha-1
+ K
solubilizing biofertilizer; T7: RDNP + 30 kg K2O + Poultry manure @ 5 t ha-1
+
K solubilizing biofertilizer; T8: RDNP + FYM @ 5 t ha-1 + K solubilizing
biofertilizer; T9: RDNP + Vermicompost @ 5 t ha-1
+ K solubilizing
biofertilizer; T10: RDNP + Poultry manure @ 5 t ha-1
+ K sloubilizing
biofertilizer. Well decomposed organic manures viz., FYM, vermicompost and
poultry manure @ 5 t ha-1 were applied one week before sowing along with
potassium solubilizing biofertilizer @ 5 kg ha-1
. Recommended dose of nitrogen
was applied in four splits in the form of urea; recommended dose of phosphorus
was applied in the form of SSP at basal uniformly to all the treatments.
Potassium was as per the treatment in the form of muriate of potash.
The influence of various treatments on growth parameters, yield, quality
parameters, nutrient content and uptake and soil properties (physico-chemical,
available nutrients, different potassium fractions) were determined by standard
procedures at different stages.
Different fractions of potassium were significantly influenced by different
treatments. Higher content of water soluble K and exchangeable K were
recorded under RDF + poultry manure @ 5 t ha-1
followed by RDF +
vermicompost @ 5 t ha-1
. Lowest non exchangeable K and step K content was
recorded under RDNP + poultry manure @ 5 t ha-1
+ K solubilizing biofertilizer
followed by RDNP + vermicompost @ 5 t ha-1
+ K solubilizing biofertilizer. The
total K content of soil was not significantly influenced by different treatment.
The soil properties viz., pH and EC were not markedly influenced by the
imposed treatments, while significantly high organic carbon was recorded in
organic manures treated plots. There was a significant influence of the
treatments on available nitrogen, phosphorus and potassium. The available
potassium content was markedly influenced by levels of potassium, organic
manures and K solubilizing biofertilizer at all the crop growth stages. Among
micronutrients (Cu, Zn, Mn and Fe), the treatmental influence was significant
with all four nutrients.
Highest dry matter production and fruit yield were recorded by the
treatment that received RDF + poultry manure @ 5 t ha-1 followed by RDF +
vermicompost @ 5 t ha-1
. The fruit quality parameters viz., crude fibre, crude
protein and ascorbic acid content of fruits were significantly influenced by
imposed treatments.
The potassium content of okra plants at vegetative, flowering and harvest
was markedly influenced by the treatments with highest K recorded in treatment
supplied with RDF + poultry manure @ 5 t ha-1
. The effect of treatments on
other nutrients in plants was not significant.
The uptake of macronutrients at vegetative, flowering and harvest was
markedly influenced by the treatments with maximum values recorded by the
treatment that received RDF + poultry manure @ 5 t ha-1 which was on par with
RDF + vermicompost @ 5 t ha-1
and RDF + FYM @ 5 t ha-1
.
The highest net returns and B: C ratio was recorded in the treatment
RDF+ PM @ 5 t ha-1
followed by RDF + VC @ 5 t ha-1
.
Description
D5450
Keywords
null