The of roots, fresh and dry weight

The study was conducted to evaluate the effect of Indole Butyric Acid
(IBA) on pomegranate propagation through stem cuttings. The experiment was
carried out under the poly-house condition at horticulture farm of Agricultural
Research Station, Pakhribas. The experiment comprised of five levels of IBA (0,
3000, 6000, 9000, 12000ppm) concentrations for treating hardwood stem cutting
of pomegranate crop. During the study period, data on success percentage of the
cuttings, number of roots, length of roots, fresh and dry weight of the roots were
recorded. The concentration of the IBA played a role in the success in rooting
of the hardwood cuttings. The maximum number of sprouts per cuttings (4.1), number
of roots per cutting (14.92), fresh weight of roots (1.04g) dry weight of roots
per cutting (0.68g) was observed from the treatment with 9000ppm concentrations
of IBA while the length of root (10.65cm) from the treatment with 12000ppm
concentration of IBA. The experiment showed that 9000ppm concentration of IBA was
better among the other treatments as it gave 67.5 per cent success in rooting
of the hardwood cuttings of pomegranate crop.

 

 

Key words: concentration, cutting, hardwood, pomegranate,
propagation

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Introduction

 

Pomegranate (Punica
granatum L.) is a well-known table fruit of tropical and subtropical
regions of the world. It belongs to the Punicaceae family with two species
namely: Punica granatum L. and P. protopunica Balf.  The tissues of pomegranate fruit, flowers,
bark and leaves contain bioactive phytochemicals that are antimicrobial, reduce
blood pressure and act against serious diseases such as diabetes and cancer. Even
juice works as medicines for curing of dyspepsia Negi et al., 2003. For
healing of diarrhoea and dysentery, there is a practice of use of seeds, bark
and rind of the fruits.

 

Pomegranate can be
grown from terai to mid hills region of Nepal. The crop shades its leaves and
acts as deciduous nature while grown in sub-tropical region while, evergreen in
nature in tropical ie. terai region. It grows best in hot dry summer and cold
winter. Propagation by seeds as well as cutting are the usual practice of
propagation while, grafting and layering are also practiced for propagation
Hartmann et al., 1997. Seed as a propagation is not used for establishing the
orchard commercially. Propagation from seed takes longer time for fruiting as
well may not be true to the type. Compared to the seed; saplings produced from
cuttings produce true to the type to parents in both vegetative and
reproductive traits. It broadly favours cutting to be the best suited method of
propagation in pomegranate Saroj et al., 2008.

 

Pomegranate can
easily root from the cuttings without any treatments as auxins. It has been
reported that the exogeneous application of auxins favours success of rooting
in cuttings. Auxins helps in induction of roots from cuttings. It is reported
that the rooting percentage is increased by three folds in pomegranate crop
when treated with auxins (Saroj et al., 2008 and Polat and Caliskan,
2009). Multiplication of the pomegranate cuttings depends on concentrations of
IBA, type of cuttings and even the media used for rooting of cuttings (Singh,
2017b). Thus, the objective of the work was to study the rooting capacity of
pomegranate in different concentrations of IBA.

 

Materials and
methods

 

The experiment
was carried out at Agricultural Research Station, Pakhribas, Dhankuta during February
to June 2017. The experiment was set-up under the poly-house structure constructed
within the nursery area of horticulture farm. The study was aimed to find the effect
of different concentrations of IBA on success of rooting of hardwood cutting of
pomegranate. A total of four concentrations of IBA (3000, 6000, 9000, 12000ppm)
and a control (without treatment) were placed for evaluation. The hardwood cuttings
of length 20-25 cm were taken from the pomegranate plant for the experiment
purpose. The proximal ends of the prepared cuttings were dipped for 10 seconds
to each IBA concentrations and in water for control as treatment before they
were placed in the experiment plot. The cuttings were placed 8cm deep in the
poly-bags filled with two parts of virgin forest soil and one part of well
decomposed farm yard manure.

 

The response to
rooting of the hardwood cuttings of pomegranate to IBA concentrations were
recorded for the success percentage of the cuttings, number of roots per
cutting, root length, fresh and dry weight of roots per cuttings. Randomized
Complete Block Design (RCBD) was the design used where; each treatment was
replicated four times. A total of 20 hard wood cuttings of pomegranate were
placed in each treatment. Data was analyzed using Gen STAT and the differences
between the means were compared by using the least significant difference at p