Thursday, November 14, 2024
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മലയാളം
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Agriculture > Spices
> Turmeric (Curcuma longa)
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Crop Management
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Production of quality planting materials
Planting materials from rhizome
Rhizomes for seed purpose are generally stored by heaping in well-ventilated rooms
and covered with turmeric leaves. The seed rhizomes can also be stored in
pits with saw dust, sand, leaves of Glycosmis pentaphylla (panal),
Stychnos nux-vomica (kanjiram) etc. The pits are to be covered with
wooden planks with one or two openings for aeration. The rhizomes are to be
dipped in quinalphos (0.075%) solution for 15 minutes if scale infestations are
observed and in mancozeb (0.3%) to avoid storage losses due to fungi.
It is a nine month crop sown in July and harvested in April. Whole or split mother
rhizomes are used for planting and well developed healthy and disease free rhizomes
are to be selected. For sowing both the mother-rhizomes, the fingers are used. The
fingers are cut into pieces each 4-5 cm long, and the mother rhizomes are planted
as such or split into two; each having at least one sound bud. The seed is sometimes
sprouted under moist straw before sowing.
Small pits are made with a hand hoe in the beds in rows with a spacing of 25 cm
x 30 cm and covered with soil or dry powdered cattle manure. The optimum spacing
in furrows and ridges is between 45-60 cm between the rows and 25 cm between the
plants. A seed rate of 2,500 kg of rhizomes is required for planting one hectare
of turmeric.
Rapid Multiplication Through 'Tissue Culture'
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The preferred method of propagation of turmeric is through pieces of rhizome. But
this is a slow process since rhizome has a dormancy period. It only sprouts during
the monsoon, and only 5 to 6 plants can be obtained from rhizome in a year.
- A rapid method of multiplication is needed especially for newly developed high yielding
varieties, which are available in small quantities.
- Tissue culture is valuable for the propagation of several plant species.
- At the CPCRI, turmeric with curcumin content up to 14 to 14.5% have been selected.
These novel selections should be studied further with tissue-culture technique.
- As regards the future possibilities of utilizing tissue culture as a commercially
accepted technique, this has already been achieved in other countries and it will
only be a matter of time before similar commercial establishments spring up in India.
- The main limitation at the moment is high initial capital costs.
- However, small-scale tissue-culture laboratories, as in several South-East Asian
countries, can produce several plants at fairly economical rates.
- Several tissue culture raised plants were tested in the field where the main plus
points are the higher yields, early flowering and fruiting patterns.
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