Vegetatio

, Volume 27, Issue 1–3, pp 131–162 | Cite as

Autecology of Acacia Senegal (L.) Willd.

  • M. S. Z. A. Cheema
  • S. A. Qadir
Article

Abstract

Acacia senegal (L) Willd. is a small sized tree species of Tropical arid region of Southern West Pakistan. It is well-known for producing gum arabic.

Fruits from dry streams with loamy sand soil type were of bigger size whereas seed output per pod and seed weight were higher in hilly regions.

The seeds possess external dormancy (seed coat), which can be broken by mechanical and chemical scarification, water (cold and boiling) and dark treatments. Seeds gave high percentage of germination in fine sand in pot culture. Germination percentage was high in May–July. The growth rate of seedlings both in pot culture and field conditions was high in April, May, June and July. Seeds collected from different localities showed considerable variation in germination capacity. Percentage and rate of germination increased with the lapse of time.

Correlation of growth and abundance ofAcacia senegal was found with topography, soil texture, soil structure, soil consistence, maximum water holding capacity, wilting coefficient (sub-surface soil), soil carbonates (surface soil) soil pH (surface soil) and community associates.

The plant can be propagated by shoot cuttings. Smaller and thinner cuttings are easily propagated.

The plant is infested by Buffaloe tree hopper and is also infected byCladosporium herbarum. Occasionally seedlings are attacked byFusarium sp.

The relative turgidity of branches was found to be high throughout the study period, but the leaves showed considerable variation.

Keywords

Germination Percentage Loamy Sand Dark Treatment Germination Capacity Loamy Sand Soil 

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Copyright information

© Dr. W. Junk b.v.-Publishers 1973

Authors and Affiliations

  • M. S. Z. A. Cheema
    • 1
  • S. A. Qadir
    • 1
  1. 1.Department of BotanyUniversity of KarachiPakistan

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