Limitations to Seedling Growth and Survival by the Quantity and Quality of Rooting Space: Implications for the Establishment ofThuja occidentalison Cliff Faces
| Autor: | D. W. Larson, U. Matthes‐Sears |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | International Journal of Plant Sciences. 160:122-128 |
| ISSN: | 1537-5315 1058-5893 |
| DOI: | 10.1086/314105 |
| Popis: | Thuja occidentalis is the dominant tree of ancient, stunted cliff‐face forests of the Niagara Escarpment, Ontario, Canada, and in Michigan and Wisconsin, U.S.A. Previous field research has shown that nutrient and water limitations at the sapling stage are absent or small, yet seedling recruitment is relatively rare. To study the relationships between rooting space, nutrient supply, growth, and survival in very young seedlings, plants were grown from seed in three pot volumes (1 mL, 10 mL, and 100 mL) and under three nutrient regimes (watering with water, one‐tenth‐strength Hoagland's solution, and half‐strength Hoagland's solution). Elongation of the main axis and side branches was measured, and survival also was monitored over 2 yr. All measures of seedling growth were significantly increased by higher nutrient levels. Effects of pot size on growth were smaller and less consistent; main axis elongation tended to be greatest in the smallest pots, but branch elongation was not affected. Survival results sh... |
| Databáze: | OpenAIRE |
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