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    Author(s): Deborah A. Abrahamson; Phillip M. Dougherty; Stanley J. Zarnoch
    Date: 1998
    Source: Water Resources Research, Vol. 34, No. 12, Pgs. 3503-3512, December 1998
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (315 KB)

    Description

    Fertilizer and irrigation treatments were applied in a 7- to l0-year-old loblolly pine (Pinus taeda L.) plantation on a sandy soil near Laurinburg, North Carolina. Rainfall, throughfall, stemflow, and soil water content were measured throughout the study period. Monthly interception losses ranged from 4 to 15% of rainfall. Stemflow ranged from 0.2 to 6.5% of rainfall. Rainfall, leaf area index (LAI), basal area (BA), and the interactions of rainfall with LAI or BA influenced prediction models of throughfall, but not stemflow, on a stand level. We found significant differences due to the effects of treatments in the soil water of the top 0.5- and l-m soil layers by the beginning of the second growing season and throughout the remainder of the study period. Average daily water use and loss from a l-m soil layer reflected the low water-holding capacity of the sand. Soil water in a l-m layer was rapidly depleted to within 10% of available water during periods of little or no rainfall. Irrigation did not significantly affect productivity and created a greater potential for loss of water to drainage below 1 m. On the basis of Zuhner's [1966] method of soil water depletion in a sandy soil under forest cover, total drainage to below 1 m was 55% of evapotranspiration in unirrigated plots and 150% of evapotranspiration in irrigated plots.

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    Citation

    Abrahamson, Deborah A.; Dougherty, Phillip M.; Zarnoch, Stanley J. 1998. Hydrological Components of a Young Loblolly Pine Plantation on a Sandy Soil with Estimates of Water Use and Loss. Water Resources Research, Vol. 34, No. 12, Pgs. 3503-3512, December 1998

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