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Effects of Herbaceous Weeds on Fourth Year Water Relations and Gas Exchange of Loblolly Pine

Published online by Cambridge University Press:  12 June 2017

Thomas H. Green ,
Robert J. Mitchell ,
Kailash C. Paliwal ,
Uday V. Pathre ,
Bruce R. Zutter  and
Dean H. Gjerstad
Thomas H. Green
Affiliation:
School of Forestry and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849-5418
Robert J. Mitchell
Affiliation:
School of Forestry and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849-5418
Kailash C. Paliwal
Affiliation:
School of Forestry and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849-5418
Uday V. Pathre
Affiliation:
School of Forestry and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849-5418
Bruce R. Zutter
Affiliation:
School of Forestry and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849-5418
Dean H. Gjerstad
Affiliation:
School of Forestry and Alabama Agric. Exp. Stn., Auburn Univ., AL 36849-5418
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Abstract

Stands of four-year-old loblolly pines grown with and without herbaceous competition were compared to determine whether early increases in soil moisture and plant water status had been maintained throughout the first four years. Non-weeded stands tended to have greater soil moisture than weeded stands, although these differences were never statistically significant (P > 0.05). Plant water potential was remarkably similar between treatments, as were photosynthesis and stomatal conductance. The increase due to weed control in foliage production early in stand development apparently caused a depletion in available soil moisture to levels similar to non-weeded stands. Therefore, the direct benefit of increased soil resources with weed control is short lived.

Keywords

Loblolly pine, Pinus taeda L.
Type
Research
Information
Weed Technology , Volume 5 , Issue 4 , December 1991 , pp. 753 - 758
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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