PJB-2000-34
ECOLOGICAL STUDIES ON RAWDHAT SYSTEM IN SAUDI ARABIA - II. SOIL SEED BANK OF RAWDHAT KHORIM
M.N. AL-YEMENI, M.M. AL-FARRAJ AND AHMED AL-FARHAN
Abstract
The germinable seeds in the seed bank in the uppermost two centimeter layer of the soil of Rawdhat Khorim in the Riyadh region of Central Saudi Arabia was studied using 1250 cm2 soil samples collected in winter season from three line transects. The seed bank composition was determined using germination experiment. Most of the seedlings emerged in the first three weeks. The final number of seedlings ranged from 18 to 1190/m2. The floristic composition of the emerged seedlings consisted of 56 plant species. There was a compositional difference in the emerged seedlings between sites having different soil texture. Biomass of the emerged seedlings ranged from 2.14 to 51.8 g/m2 depending on the seedling density and soil texture.
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