Relationship between environmental factors, tapping dates, tapping intensity and gum arabic yield of an Acacia senegal plantation in western Sudan
- 作者：M.E. Ballal ; E.A. El Siddig ; M.A. Elfadl and O. Luukkanen
- 关键词：Acacia senegal ; Climatic factors ; Tapping ; Gum arabic yield ; Plantation ; Sudan
- 刊名：Journal of Arid Environments
- 出版年：2005
- 期刊代码：93_01401963
- 类别：ear
- 出版时间：2005
- 卷：63
- 期：2
- 页码：379-389
- 文件大小：199 K
摘要
Gum arabic yield, from Acacia senegal, and yield trends were studied at the Demokeya (13° 16′; 39° 29′E; Alt.560 m) experimental site in Western Sudan. The effects of the date and intensity of tapping, rainfall and the minimum and maximum temperatures at tapping and gum collection on gum arabic yield were examined for eight years (1992–1999/2000) in a 12-year-old plantation. The objective of the study was to establish an understanding of the causes of variability in gum arabic yield and yield trends as a basis for yield control, prediction and stability. The results showed tapping dates produced roughly similar gum production patterns across years. Yield was found to be positively correlated with tapping intensity, rainfall and the minimum and maximum temperatures at tapping time, and negatively correlated with tapping time and the minimum and maximum temperatures at gum collection. The time of tapping, tapping intensity, rainfall and the maximum temperature at gum collection were found to explain 85%of the total variability in gum yield per unit area. The gum yield (g) of the first pick was highly correlated (r