Abstract:
This research is intended to contribute to knowledge concerning tree establishment. The study was conducted in the season 2016-2017 to assess the effect of sowing date and shade on seedling performance of Acacia senegal. The experiment was carried out at the Nursery of the Institute of Gum Arabic Research and Desertification Studies, University of Kordofan, El Obeid, Sudan. The experimental design used was the complete block design method where three different sowing dates replicated four times, this was conducted under direct sun light and under shade, and the experimental unit consists of 80 seedlings. Excel was used for data analysis. Study results showed significant the length and number of leaves were very high significant affected by the sowing date, shade and under sun (p = 0.0001). Diameter was no significantly by the sowing date, shade and under sun. However October 10th sowing had significantly bigger root collar diameter compared to all sowing date. The Seedlings under shade recorded the longest seedling length (25.3 cm) and number of leaves showed high significant under sun (18.2 leaves).
There is a hardening and rapid establishment of seedlings that were planted outside the shade and this appears by increasing the number of leaves for the seedlings, and these are advantages of plantation establishment for their dependence on photosynthesis
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