Effect of Water Regimes on the Survival, Growth, and Morphology of Tupelo Seedlings
Survival of swamp and water tupelo seedlings grown under six saturated soil-water regimes was nearly 100 percent in all water treatments. Height growth in moving water was about double that in comparable stagnant water treatments, and total dry weight growth was 2 to 5 times greater. Reduced height growth occurred under all water treatments in late May and early June, but the rate in moving water did not drop as low as in stagnant water treatments. Root growth was severely restricted in stagnant water, and the top/root ratio increased with degree of flooding. Growth was correlated positively with pO2 and negatively with pCO2 in soil water. Lenticels proliferated on all flooded stems. Water roots developed on stems that were flooded continuously with moving water; such roots were more abundant on swamp tupelo (82 percent) than on water tupelo (17 percent). Forest Sci. 16:304-311.
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