Journal of Rangeland

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This study aimed to evaluate the effects of various utilization methods on gum production from Ferula assa foetida in Tangsorkh rangeland, Kohgiluyeh and Boyerahmad province.  A completely randomized approach with factorial design, ten replication, and three treatments including age of plants (5-6 years, 5-7 years and 9-10 years), method of cutting (one-sided (90°), two-sided (90°) and conventional), and the number of cutting (10, 15 and 20 cutting) was conducted for the current study. Comparisons of means were performed by Duncan's multiple range tests.  The results showed that there is a significant difference between oleo-gum-resin productions in the species with various age classes. The greatest oleo-gum-resin was collected from the species of 9-10 years old with an average of 61.38 gram per plant. Also, the gum production varied significantly between various utilization methods and the number of cutting per plant. The highest gum production per plant was observed in conventional method as well as 20 cutting treatments with 50.91 and 56.74 gr respectively. The interaction between the age of plants, utilization methods and the numbers of cutting treatments on the gum production were significantly different (P < 0.05). The lowest and highest gum production were collected in 5-6 years old plant with 10 one-sided cutting (13.61gr) and 9-10 years old plants with 20 cutting with the conventional method (93.79 gr) respectively.  Although the conventional utilization method yields the more gum production, the chance of plant survival after the cutting in this method is very low. We concluded two side cutting is an appropriate utilization method because it produces high amount of gum with low risk of dying for the species.
 

Keywords: Ferula assa foetida L., Oleo-gum-resin, Utilization, Tangsorkh rangeland, Kohgiluyeh and Boyerahmad.

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