EFFECT OF DIFFERENT LEVELS OF NPK ON PLANT GROWTH, YIELD AND FLOWER QUALITY OF ZINNIA (Zinnia elegans L.) 3370
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Date
2021-09
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JAU JUNAGADH
Abstract
Zinnia, nitrogen, phosphorus, potassium, interaction
The field experiment entitled “Effect of different levels of NPK on plant
growth, yield and flower quality of zinnia (Zinnia elegans L.)” was carried out during
February to June, 2020. The experiment ware laid out in Factorial Randomized Block
Design (FRBD) with control vs rest concept. Total thirteen treatment combinations of
three levels of nitrogen viz., 100 kg ha-1
(N1), 150 kg ha-1
(N2) and 200 kg ha-1
(N3),
two levels of phosphorus viz.,50 kg ha-1
(P1) and 75 kg ha-1
(P2) and two levels of
potassium viz., 50 kg ha-1
(K1) and 75 kg ha-1
(K2) and replicated thrice.
The result of experiment revealed that individual effect of nitrogen 200 kg ha-1
(N3) recorded. higher plant height, number of branches per plant, plant spread (N-S),
fresh weight of plant, chlorophyll content and it was at par with 150 kg ha-1
(N2) in
such parameter, but higher plant spread (E-W) was observed in 150 kg ha-1
(N2) and at
par with 200 kg ha-1
(N3) level. The minimum days to first flower bud appearance
reported in 100 kg ha-1
(N1). Maximum duration of noted in 150 kg ha-1
(N2) and at
par with 200 kg ha-1
(N3) level.
The higher flower bud length, number of flower per plant, weight of single
flower, flower yield per plant, higher flower yield per plot and flower yield per
hectare was observed in 150 kg N ha-1
(N2).
For the phosphorus, maximum number of branches per plant, fresh weight of
plant, flower head diameter and flower head diameter were found in 75 kg ha-1
(P2).
Higher phosphorus content in plant was observed in 75 kg ha-1
(P2). but, it was also at
par with in 50 kg P2O5 ha-1
(P1). However, higher phosphorus uptake was recorded in
150 kg ha-1
(N2) level.
In the potassium, higher flower bud length, vase life of flower of flower was
found in 75 kg ha-1
(K2) and maximum potassium uptake was showed in 150 kg ha-1
(N2) treatment.
The interaction effect of NPK was found significant for plant height and
recorded maximum plant height in treatment combination 200: 75: 75 NPK kg ha-1
(N3: P2: K2), but it was at par with 150: 50: 75 NPK kg ha
-1
(N2: P1: K2), 150: 75: 50
NPK kg ha-1
(N2: P2: K1), 200: 50: 75 NPK kg ha-1
(N3: P1: K2) and 200: 75: 50 NPK
kg ha-1
(N3: P2: K1). Flower head diameter was noted maximum in treatment
combination of 200: 75 NP kg ha-1
(N2: P2) and it was found at par with 150: 50 NP
kg ha-1
(N2: P1). Shelf life of flower was maximum in treatment combination 200: 50
NP kg ha-1
(N3: P1) and found at par with 150: 75 NP kg ha-1
(N2: P2). Maximum
flower yield per plant was noted in treatment combination 150: 75: 50 NPK kg ha-1
(N2: P2: K1) and it was found at par with 150: 50: 75 NPK kg ha-1
(N2: P1: K2) and
150: 75: 75 NPK kg ha-1
(N2: P2: K2). Maximum potassium uptake was noted in
treatment combination 150: 50 NK kg ha-1
(N2: K1) which was at par with 150: 75 NK
kg ha-1
(N2: K2) and 200: 50 NK kg ha-1
(N3: K1). Maximum potassium uptake was
noted in treatment combination 150: 75: 50 NPK kg ha-1
(N2: P2: K1) and found at par
with 150: 50: 75 NPK kg ha-1
(N2: P1: K2).
It is concluded that zinnia are fertilized @150 kg N ha-1
in two split (half dose
at the time of transplanting and the remaining half dose the at the 20 days after
transplanting) plus 75 kg P2O5 ha-1
and 50 kg K2O ha-1
as basal dose for higher flower
yield, net return and BCR under South Saurastra region condition.