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Soil Nutrients and Loblolly Pine Xylem Sap Composition

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The nutrient supply in a young stand of Pinus taeda L. was increased by the application of inorganic fertilizers and the effect upon xylem sap constitutuents was investigated. Nitrogen produced an increase in the total-N, "amino-N", and "amide-N" levels. Glutamine was the most abundant amino acid in all samples. The phosphorus level in the xylem sap was increased by phosphorus application but decreased by nitrogen. Examination of the NP and NK interactions indicated that the depressing effect of nitrogen occurred only when phosphorus or potassium was applied along with the nitrogen. Potassium application to the soil increased potassium levels in the sap.
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Document Type: Journal Article

Affiliations: Assistant Professor, Dept. of Forestry, Auburn Univ. Agric. Expt. Sta., Auburn, Ala.

Publication date: 1965-06-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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