| Autor: |
Hadinejad, M., Erfanzadeh, R., Ghelichnia, H. |
| Zdroj: |
Iranian Journal of Range & Desert Research; 2020, Vol. 27 Issue 4, p125-139, 15p |
| Abstrakt: |
The present study was conducted to investigate the canopy cover effect of three woody species of Almond (Amygdalus scoparia), daphne (Daphne mezereum), and Ebenus stellata on the composition and density of the seed bank of the soil under their stratum. The study was performed in the early fall of 2017 after the end of the growing season and the fall of their seeds in the Chenarnaz village rangelands of Yazd province. Fifteen individuals were selected from each of the mentioned woody species. Soil samples were taken by an auger from under the canopy of woody species with a control treatment outside the canopy. Soil seed density and composition in the samples were measured by cultivation in a greenhouse. The results of oneway analysis of variance showed that the total density of the seed bank under the canopy of three woody species A. scoparia (with an average of 1133.17 seeds m²), D. mezereum (with an average of 823.10 seeds m²), E. stellata (with an average of 793.21 seeds m²) were significantly different from each other. Besides, the total density of the seed bank under the canopy of the three mentioned woody species was significantly higher than outside the canopy (with an average of 134.48 seeds m2). Also, species with hemicryptophyte biological form had the highest abundance in the soil seed bank. The results of this study showed the positive effect of canopy cover of woody species in semi-arid regions of the country on increasing the density of seed bank under the canopy compared to the environment, and the higher effect of A. scoparia on the density of seed bank under the canopy compared to D. mezereum and E. stellata was proved, and the conservation of this species was emphasized. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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