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Standardization of Tapping Techniques of Gum Extraction in Lannea coromendelica:A Valuable Gum Yielding Tree
Gum collection from trees is important livelihood sources for local dwellers in drought prone Rajasthan and its surroundings areas. The industrial application of natural gums have been expanded tremendously in recent years. Traditional method of gum tapping is crude and unscientific; the deep incision, untimely extraction and high concentration of chemicals in gum have affected the Lannea coromendelica species in its natural habitat. The studies were conducted for two years to standardize the tapping methods, tapping seasons, chemical concentration on trees having dbh >40cm from natural stands. For obtaining the maximum gums from these species, different tapping techniques have been applied to enhance the gum production. In bore hole tapping method, a hole of 5 cm is made on tree stem yielded higher gum yield when injected with ethephon concentration of 300 mg/ml and 400mg/ml in Lannea coromendelica. The Maximum gum production was obtained in borehole tapping method and minimum was procured from V-shaped tapping method. Ethephon has proved better extraction chemical over the sulphuric acid. Ethephon concentration of 300mg/ml showed the highest gum production of 144.2 grams/tree. However, lower concentration of sulphuric acid did not show significant results Ethephon induces gummosis without affecting the health of tree. Tapping seasons also significantly affect the gum production, the highest gum production of 66.94 gram /tree was obtained in April -June tapping season
Natural Gums, Tapping, Borehole Method, Ethephon, Lannea coromendelica.
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