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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 49, Number 3 (2000) → Effect of Nitrogen Fertilization Rate in the Seedbed on Growth of Loblolly Pine in the Field

Effect of Nitrogen Fertilization Rate in the Seedbed on Growth of Loblolly Pine in the Field

Varying rates of nitrogen were applied to loblolly pine (Pinus taeda L.) seedbeds at 2 nurseries in Virginia. At the New Kent Nursery, the rates were 168, 336, and 504 kg/ha (150, 300, and 450 lb/a) of elemental nitrogen. Seedlings with root collar diameters averaging either 4.7 or 5.5 mm from each nitrogen rate were planted in the field. At the Sussex Nursery, seedlings were fertilized with either 336 or 672 kg/ha (300 or 600 lb/a) of elemental nitrogen combined with either 13 or 25 mm (0.5 or 1.0 in) of sawdust tilled in just before seeding. Due to a higher seedbed density, only seedlings with root collar diameters averaging 4 mm were planted in the Sussex study. For both studies, nitrogen rate did not have a statistically significant effect on survival, height growth, or diameter growth after 7 years in the field. Tree Planters' Notes 49(3): 61-63; 2000.


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Author(s): Thomas A. Dierauf, Laurie A. Chandler

Publication: Tree Planters' Notes - Volume 49, Number 3 (2000)

Section: Little-Known Classics

Volume: 49

Number: 3