Growth and Mortality of Pin Oak and Pecan Reforestation in a Constructed Wetland: Analysis with Management Implications

Date Written: 
Mon, 07/13/2009

ABSTRACT: Pin oak (Quercus palustris Muenchh.) and pecan (Carya illinoensis (Wangenh.) K. Koch) trees were planted on reforestation plots at Four Rivers Conservation Area in west-central Missouri. The study was conducted to determine survival and growth rates of the two species under different production methods and environmental variables. Production methods included direct seeding, bare root seedlings, and RPM® planting stock. Combi-nations of planting stock and species were implemented on two elevations (mounded or unmounded soils). Survival rates were not significantly different between species for any treatments throughout the six-year study period. The lowest survival rate was observed in pecan RPM® planting stock in mounded soil (82%). Pin oak bare root seedlings had a 100 % survival rate. Pin oak and pecan exhibited the highest growth rates in mounded RPM® planting stock (9.7 cm, 4.3 cm, and 294 cm, 154 cm for pin oak and pecan dbh and height, respectively). The smallest average dbh and height in 2007 was found in direct seeded trees at high elevations for both species (2.6. cm, 1.7 cm, and 117 cm, 76 cm for pin oak and pecan dbh and height, respectively). Growth rates between species were significantly different across all treatments except unmounded RPM® planting stock for which pecan data was unavailable.

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