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Sewage Sludge Increases Early Growth and Decreases Fusiform Rust Infection of Nursery-Run and Rust-Resistant Loblolly Pine

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An intensively prepared site in a high-rust hazard area was fertilized with municipal sewage sludge to provide 300 or 600 lb/ac total nitrogen before planting nursery-run and fusiform rust-resistant seedlings. Rust-resistant seedlings had significantly greater first-year survival and significantly lower rust infection at age 6. The sludge treatments increased 6-year diameter and volume growth and decreased rust infection significantly; there were no differences between the two sludge levels. Sludge fertilization significantly increased average height, diameter, and stem volume of the largest 300 trees/ac and has begun to stimulate crown class differentiation. The greater growth of the larger trees did not alter the proportion infected by rust. Results indicate that even in areas of high-rust hazard, intensive site preparation and sludge fertilization can increase early growth and accelerate stand development of loblolly pine if rust-resistant stock is planted. South J. Appl. For. 13(2):68-71.

Document Type: Journal Article

Affiliations: USDA Forest Service, Southeastern Forest Experiment Station, Athens, Georgia 30602

Publication date: 1989-05-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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