EFFECT OF NANO SCALE NUTRIENTS ON GROWTH, FLOWER YIELD AND VASE LIFE OF GERBERA (Gerbera jamesonii Bolus ex Hooker F.) GROWN UNDER POLYHOUSE CONDITIONS
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Date
2021-03-15
Authors
Journal Title
Journal ISSN
Volume Title
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COLLEGE OF HORTICULTURE, ANANTHARAJUPETA, Y.S.R KADAPA DISTRICT, -516 105, ANDHRA PRADESH
Abstract
The present investigation “Effect of nano scale nutrients on growth, flower
yield and vase life of Gerbera (Gerbera jamesonii Bolus ex Hooker F.) grown under
polyhouse conditions” was conducted during the period from November 2018 to
September 2020 at College of Horticulture, Dr. Y.S.R Horticultural University,
Anantharajupeta, Y.S.R District of Andhra Pradesh.
Experiment-I was laid out in Completely Randomized Design CRD with
three replications and nine treatments (T1: Nano ZnO @ 100 ppm, T2: Nano
ZnO @ 150 ppm, T3 : Nano ZnO @ 200 ppm, T4: Nano ZnO @ 300 ppm, T5:
Nano FeO @ 100 ppm, T6: Nano FeO @ 150 ppm, T7: Nano FeO @ 200 ppm,T8:
Nano FeO @ 300 ppm and T9: Control (water spray)). Among different
concentrations of nano ZnO used, ZnO @ 300 ppm recorded maximum plant
height (36.85 cm) number of leaves plant-1
(24.60), leaf length (27.51 cm), leaf
width (12.53 cm), leaf area (276.00 cm
2
), plant spread (36.20 cm), flower stalk
length (58.40 cm), stalk diameter (7.79 mm), neck diameter (5.80 mm), flower
head diameter (11.90 cm), flower disc diameter (2.70 cm) and number of flowers
plant-1
(18.40) whereas ZnO @ 200 ppm took minimum number of days for
flower bud initiation (47.07 days), number of days taken for bud burst (52.00
days) and days taken taken to reach marketable stage from bud burst (5.80 days).
Among different concentrations of nano FeO applied, FeO @ 300 ppm has
significantly increased plant height (35.55 cm), number of leaves plant-1
(22.43),
leaf length (26.98 cm), leaf width (12.20 cm), leaf area (263.81 cm
2
) and plant
spread (33.37 cm), maximum flower stalk length (56.97), stalk diameter (7.57),
neck diameter (5.63), flower head diameter (11.73), flower disc diameter (2.40)
and number of flowers plant-1
(17.97) and also took lesser number of days for
flower bud initiation (49.07 days), number of days taken for bud burst (53.93
days) and days taken taken to reach marketable stage from bud burst (6.07 days).
Experiment-II was carried out to study the effect of nano and conventional
forms of zinc conditions.
and iron and their combined effect on growth, yield and quality of
Author : A. DEVI PRIYA
Title of thesis : Effect of nano scale nutrients on growth, flower
yield and vase life of Gerbera (Gerbera jamesonii
Bolus ex Hooker F.) grown under polyhouse
gerbera in a Completely Randomized Design with three replications and 12
treatments (T1: ZnO @ 300 ppm, T2: ZnO @ 200 ppm, T3: FeO @ 300 ppm, T4:
FeO @ 200 ppm, T5: FeSO4 @ 0.2%, T6: ZnSO4 @ 0.2%, T7: ZnO @ 300 ppm +
FeO @ 300 ppm, T8: ZnO @ 300 ppm + FeO @ 200 ppm, T9: ZnO @ 200 ppm +
FeO @ 300 ppm, T10: ZnO @ 200 ppm + FeO @ 200 ppm, T11: ZnSO4 @ 0.2%
+ FeSO4 @ 0.2%, T12: control (Water spray)).
Among all the treatments T8 (ZnO @ 300 ppm + FeO @ 200 ppm)
recorded maximum plant height (47.15 cm) number of leaves plant-1
(41.43), leaf
length (34.32 cm), leaf width (14.09 cm), leaf area (386.58 cm
2
), plant spread
(50.78 cm), number of suckers plant-1
(7.15), flower stalk length (65.47 cm), stalk
diameter (7.63 mm), neck diameter (5.90 mm), flower head diameter (12.97 cm),
flower disc diameter (2.64 cm), length of ray floret (5.46 cm), width of ray floret
(1.08 cm) and also number of flowers produced plant-1
(66.27), number of
flowers m
-2
(397.64), number of flowers hectare-1
(39.76 lakhs) and net returns
(lakh Rs. 84.82 ha-1
) with higher B:C ratio (1:3.33) upto 360 DAP. The number
of days taken to flower bud initiation, bud burst, and days to reach marketable
stage from bud burst (44.38 days, 49.41 days and 6.00 days respectively) was
found to be early in T9 (ZnO @ 200 ppm + FeO @ 300 ppm).
Maximum chlorophyll (1.69 mg g-1
FW) and carotenoid (8.84 mg 100 g-1
)
content was recorded in T9 (ZnO @ 200 ppm + FeO @ 300 ppm). The available
N (4.97%), P (1.17 %) K (5.40 %), Zn (119.50 %) and Cu (36.17 %) content of
gerbera leaf were recorded highest with foliar application of T8 (ZnO @ 300 ppm
+ FeO @ 200 ppm) at 360 DAP. The highest B (68.19 ppm) and Mn (131.60
ppm) content was recorded in T9 (ZnO @ 200 ppm + FeO @ 300 ppm whereas
Fe content (356.67 ppm) was found to be highest in T7 (ZnO @ 300 ppm + FeO
@ 200 ppm) at 360 DAP.
Experiment-III was carried out with three replications and 12 treatments
(T1: Deionized water, T2: Sucrose@ 2%, T3: Sucrose@ 4%, T4: Silver nitrate@
20 ppm, T5: Silver nitrate@ 20 ppm+ Sucrose@ 2%, T6: Silver nitrate@ 20
ppm+ Sucrose@ 4%, T7: Nano silver particles @5 ppm, T8: Nano silver
particles @10 ppm, T9: Nano silver particles @5 ppm + sucrose 2%, T10: Nano
silver particles @5 ppm + sucrose 4%, T11: Nano silver particles @10 ppm +
sucrose 2%, T12: Nano silver particles @10 ppm + sucrose 4%). Among different
treatments, (T11) 10 ppm nano silver + sucrose 2% recorded maximum fresh
weight of flower (20.08 g), water uptake (8.78 g), TLW (8.63 g), water balance
(1.54 g) and vase life (19.77 days).
Description
1. To standardize the suitable concentrations of nano micronutrients (Fe and Zn)
for production of gerbera.
2. To study the influence of nano micronutrients (Fe and Zn) on growth, flower
yield and quality of gerbera.
3. To find out the effect of silver nano particles on vase life of gerbera cut
flower.
4. To work out the economics of gerbera flower prouction as influenced by foliar
application of nano micronutrients (Fe and Zn).