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Germination Requirements of Lotebush (Ziziphus obtusifolia var. obtusifolia)

Elizabeth R. Speer and Henry A. Wright
Journal of Range Management
Vol. 34, No. 5 (Sep., 1981), pp. 365-368
DOI: 10.2307/3897905
Stable URL: http://www.jstor.org/stable/3897905
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Germination Requirements of Lotebush (Ziziphus obtusifolia var. obtusifolia)
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Abstract

Optimum average temperatures for germination of lotebush (Ziziphus obtusifolia var. obtusifolia) seeds in the laboratory were 20° to 30°C. Although some germination occurred without light and without a cold treatment, both of these factors tripled germination when they were present. Aging was unnecessary to obtain optimum germination. Best emergence in the field occurred when average soil temperatures ranged from 22.4° to 27.1°C. These field temperatures are most common in early spring and early fall. Litter enhanced germination in late spring and summer. Timing of precipitation is a limiting factor during the warmest months.

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