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Abstract
Royal paulownia is becoming an important hardwood plantation species in the southern U.S. A study was done to investigate two novel site preparation techniques for aiding the establishment of royal paulownia seedlings in the Virginia Piedmont. The effects of these treatments on the foliar nutrition of first year seedlings was determined, as was the relationship between soil fertility levels and foliar nutrition in the three study blocks. Seedlings established following both trenching and subsoiling treatments had significantly higher levels of foliar P than the control seedlings. Seedlings growing in the trenched plots had higher levels of foliar N than the control seedlings. For example, the seedlings growing in the trenched plots had average foliar N levels of slightly over 25,000 mg/kg, while the control seedlings had levels of 17,250 mg/kg. The seedlings in control plots also had lower, but not significantly so, foliar levels of K, Ca, Fe, and Mn. Soil fertility levels, based on soil test measurements, had positive and significant relationships with the foliar nutrient levels, as determined by simple linear regression.
Citation
Johnson, James E.; Mitchem, David O.; Kreh, Richard E. 2002. The Relationship Between Soils and Foliar Nutrition For Planted Royal Paulownia. In: Gen. Tech. Rep. SRS-48. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pg. 239-244
