Document Type : Research Paper
Author
Nabiei, M. G. (Member of scientific board of Research Center of Natural Resources & Livestock Affairs of Zanjan Province). NO. 1216,6th. Eastern Ave., phase 3., Shahrak-e-Karmandan, 45139116367, Zanjan-IRAN.
Abstract
This expriment was initiated in order to determine the effect of gum extraction, using a side cut on plant lump, on the survival and regeneration of Ferulla gummosa in a split plot design with 3 replication including: 2 main treatments one time and two times gum extraction, and 4 subtreatments including: 1,2,3 times side cut on plant lump and control (treatment without any side cut) in the Shilander, Tarom-e-Olia, a natural site for Ferulla gummosa, located at kilometer 55 from northeastern of Zanjan city.This experimental plan were put into practice in 1995 for a period of 7 years.
Gum production of main treatments and subtreatments were collected and weighed in 1995 and 1998 years only. And finally the complex averages per shrub unit was compared using Dunkan's test.
Obtained results from gum production show that, there is a significant difference between the number of cuts, and the highest production belong to three times cut. There is no significant diffrence between main treatments (gum extraction), and since the highest production belong to two times gum extraction so two times can be adviced.comparison of complex average of the interaction effect of main treatment and subtreatment show that there is a significant difference between interaction effect of two times gum extraction along with three times side cut has the highest gum production and interacion effect of one times gum extraction along with one time side cut had the lowest gum production.
Keywords
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