Nutrient requirement of mango- ginger (Curcuma amada Roxb.)
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Date
1997
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Department of Horticulture, College of Agriculture, Vellayani
Abstract
A field experiment was conducted at the College of
Agriculture, Vellayani, during the period June-December 1995, to
study the effects of different doses of nitrogen, phosphorus and
potassium on the growth, yield and quality of mango-ginger. The
treatments consisted of factorial combinations of 3 levels each
of nitrogen (15, 30 and 45 kg N ha-1), phosphorus (15, 30 and 45
kg P2O5 ha-1) and potassium (30, 60 and 90 kg K2O ha-l) with
absolute control. The experiment was laid out as 33+1 Factorial
Randomised Block Design with three replications.
Nitrogen (30 kg ha-1) recorded maximum values for most
of the characters namely plant height, leaf area index, dry
matter production, crop growth rate, bulking rate, top yield,
fresh rhizome yield, recovery of dry rhizome, volatile oil.
Application of highest dose namely, 45 kg N ha-l resulted in
highest number of tillers, number of leaves, utilization index,
harvest index, non-volatile ether extract, fibre content and
chlorophyll content.
Phosphorus (30 kg ha-1) registered higher values for
plant height, number of leaves, leaf area index, bulking rate,
rhizome spread, fresh rhizome yield and recovery of dry rhizome.
Application of 45 kg P205 ha-1 produced maximum sprouting, number
of tillers, number of leaves, dry matter production, net assimi-
lation rate, top yield, volatile oil, fibre content and
chlorophyll fractions.
Application of 60 kg K20 ha-1 registered maximum leaf
area index, bulking rate, fresh rhizome yield, recovery of dry
rhizome, utilization index, harvest index and fibre content.
Potassium at 90 kg K20 ha-1 recorded highest plant height, number
of tillers, number of leaves and top yield. Lower dose of 30 kg
K20 ha-1 produced higher volatile oil, non-volatile ether extract
and chlorophyll contents.
Significant increase in nutrient uptake was observed
with their application at higher levels. Soil nutrient status
after the experiment was maximum at higher rates of application
of the respective nutrients.
Among treatment combinations 30:30:60 kg NPK
recorded maximum fresh rhizome yield.
This combination also
recorded the highest net returns and benefit cost ratio. Thus
30:30:60 kg NPK ha-1 can be recommended as the fertilizer dose
for mango-ginger. The physical and economic optimum dose was
worked out to be 33:28:62 kg N, P2O5 and K2O ha-1.
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Citation
171258