NDLI: Growth performance and gum arabic production of Acacia senegal in northwest lowlands of Ethiopia

Content Provider	Springer Nature Link
Author	Alemu, Asmamaw Yilma, Zewdu Eshete, Abeje Dejene, Tatek
Copyright Year	2013
Abstract	Despite the wide distribution of natural stands of Acacia senegal in Ethiopia, commercial exploitation of gum arabic is constrained by lack of tapping and development techniques. We evaluated the gum arabic yield from natural stands of A. senegal and the growth of 6 provenances in different parts of the country. For the gum yield evaluation from natural stands, four tapping positions and three tapping seasons were tested in a factorial RCB design. The second experiment in Metema evaluated survival and growth of six provenances. A. senegal trees in natural stands respond well to tapping if tapped during the appropriate season and at the correct position on the tree. The mean gum yield did not vary significantly by tapping season (p=0.63). Higher mean yield was, however, collected from trees tapped in October (96 g·tree$^{−1}$ per two harvests). The mean yield differed significantly (p=0.009) between the tapping positions. Mean separation (α=0.05) shows that trees tapped at mid stem gave higher yield (160 g·tree$^{−1}$ per two harvests). The interaction effect of tapping season and position was not significant. Higher mean yield ((70 ± 112) g·tree$^{−1}$) was recorded in mid October-mid stem in two harvests. The second experiment indicated statistically significant difference in mean survival (p=0.0298), height (p=0.000) and root collar diameter (RCD), (p=0.012) between the six provenances. Highest survival, height and root collar diameter growth was observed from Abderafi provenance (100%, (148±11) cm, (38±11) mm, respectively). We recommend October and mid-stem and branches as appropriate tapping season and position. We recommend planting of the Abderafi provenance for the study area due to its superior growth and survival. Our study contributes to the proper selection of provenances for plantation development and improved tapping technology for better production of gum arabic in the country.
Starting Page	471
Ending Page	476
Page Count	6
File Format	PDF
ISSN	1007662X
Journal	Journal of Forestry Research
Volume Number	24
Issue Number	3
e-ISSN	19930607
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-07-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	A. Senegal gum Arabic tapping season position provenances growth performance Forestry
Content Type	Text
Resource Type	Article
Subject	Forestry

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