Assessment of response to elevated carbon dioxide concentration in santalum album l.
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UASD
Abstract
Sandalwood (Santalum album L.) is a prized gift of the plant kingdom woven into the culture
and heritage of India. It has gained prominence over other tree species, because of high demand and
increasing commercialization. To fulfill the increasing demand it is needed to achieve fast growth of
the seedling in the nursery stage and as well in the planted site. Keeping this as theme, an attempt
was made to assess the growth response of sandalwood in context to elevated carbon dioxide
conditions. The ambient CO2 is enhanced by trapping the CO2 released during dark respiration of the
seedlings and also from soil respiration. Seedling were kept in the rectangular trench of 1.5m length,
1.2m width and 0.5m depth and then well exposed to sun light. The trenches were covered by
polythene sheets; during 4.00 pm to 11.00 am before closing chamber water was sprinkled. The
treatments were consists of control (ambient condition), elevated CO2 treatment with FYM (i.e., 3, 6,
9, 12 and 15 kg FYM) and elevated CO2 treatment with no FYM. The experiment was carried out in
Completely Randomized Design with four replications. The morphological parameters such as plant
height, collar diameter, and number of leaves, leaf area, seedling biomass and physiological
parameter such as photosynthetic rate, transpiration rate, and stomatal conductance were recorded at
120 days. Growth parameters found to be higher in the treatment of elevated CO2 with 15 kg FYM.
The increase in plant height, collar diameter, number of leaves and leaf area is 35.15, 109.85, 68.01
and 28.28 per cent respectively over control. Photosynthetic rate, transpiration rate and stomatal
conductance is also found highest in 15 kg FYM treatment i.e. 19.66 μ mol. m-2 s-1, 3.04 m mol. m-2 s-1
and 0.30 m mol. m-2 s-1.
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