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Ferula assa-foetida L. is an important industrial and medicinal plant of Iran   which is mainly distributed in arid and semi-arid areas of Khorasan province   in north east of the country. Gum of this plant is widely used in   pharmacological industry. This plant is endangered because of more harvesting   and unsustainable harvesting methods. The objective of this study was to   evaluate the effects of different cutting methods (conventional, cut of crown   part, concave and surface) and times of cutting (5, 10 and 13 times) on gum   yield of this species in its wild habitat in Mazar region in Bajistan. The   treatments were studied under a factorial experiment which was arranged in a   completely randomized design with three replications. Results showed   significant differences among cutting methods and times of harvesting. Yield   of gum was affected by times of harvesting and the highest yield was obtained   in 10 cutting times. The highest and lowest gum yields were obtained in   concave method with 10 cutting times (25.24 g/plant) and superficial method   with 5 cutting times (2.02 g/plant), respectively. Results showed that   conventional cutting method destroys crown buds, which causes death of the   plant. The highest gum yields and the best plant regeneration rates were   obtained by using of concave method with 10 cutting times

Effects of different cutting methods and times of cutting on growth performance and gum resin production of ferula assa-foetida