International Trials of Acacia and Prosopis: Overview of results

bullet1 Pakistan
bullet2 Site: Dagar Kotli

bullet3 Trial 21: Provenance trials of Acacia albida, A. senegal and A. tortilis

This trial comprises two provenances of Acacia albida from Senegal, five provenances of A. senegal from Pakistan and one provenance of A. tortilis from Israel. The trial was established in 1984 with a spacing of 3x3 metres. The trial was assessed at an age of eight years in 1992. Different growth parameters were measured and subjected to analyses of variance and multivariate analyses.

The provenances of A. albida had a markedly faster growth in height and crown area than the other provenances, although it did not differ in survival. The fastest growing provenance of this species had an increment rate in basal area of 1 m2 ha-1 y-1, corresponding to a dry weight production of approximately 1.5 t ha-1 y-1. This is remarkable considering that the annual precipitation at the site is only 100 mm.

A. tortilis was growing very slowly, but since only one provenance was represented no conclusion can be made on the production of this species at the site. In A. senegal, there were significant differences between provenances in survival and crown area, and the best performance was obtained in a provenance from South-eastern Sind.