Notes: Survival, Dry Matter Accumulation, and Water Use of Loblolly Pine Seedlings Treated with Chemical Antitranspirants

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In tests on 1,670 seedlings, different volumes of decenyl succinic acid (DSA) and phenylmercuric acetate (PMA) were sprayed at concentrations ranging from 1 molar to 10-5 molar in several carriers. DSA at 10-1.5 molar and PMA at 10-3 molar concentration reduced transpiration for at least 3 weeks. Height growth was unaffected after one growing season, but root and needle weights were less than those of controls. Seedlings treated with these metabolic retardants and then subjected to droughts of up to 6 weeks' duration survived no better than controls. Forest Sci. 20:372-374.

Keywords: Pinus taeda; Transpiration

Document Type: Miscellaneous

Affiliations: Principal Soil Scientist at the Forest Hydrology Laboratory, which is maintained at Oxford, Mississippi, by the Southern Forest Experiment Station, USDA Forest Service, in cooperation with the University of Mississippi

Publication date: December 1, 1974

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