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Effect of Stand Composition and Season on Chemistry of Throughfall and Stemflow of Ponderosa Pine Forests

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A 3-year study was conducted in the Arizona ponderosa pine forest to determine the influence of several forest stand conditions on input and cycling of seven major nutrients by precipitation, throughfall, and stemflow. Timber stand conditions studied included (1) dense 54-year old saplings and small poles, (2) large poles, and (3) thinned large poles. Stand conditions significantly influenced both the concentration and amount of nutrients transferred in throughfall and stemflow. Total Kjeldahl nitrogen and NO3-N were absorbed from incident rainfall by sapling and small pole stands while throughfall of all stands gained in Ca, Mg, and K. Gain of Ca and Mg in throughfall was greatest in large pole stands. Concentration of stemflow nutrients was greatest for large pole stands, but amount of stemflow nutrients was greatest in sapling and small pole stands. The pattern for amount of nutrients transferred was strongly seasonal with the largest amount delivered in midsummer, probably by leaching from leaves and bark. The seasonal pattern for concentration of nutrients was less regular than for amount of nutrients and more strongly affected by dry fallout. Forest Sci. 29:871-887.
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Keywords: Pinus ponderosa; nutrient cycling

Document Type: Journal Article

Affiliations: Statistician, University of Arkansas, Fayetteville, AR 72701

Publication date: 1983-12-01

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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