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Soil Moisture Influence on Growth, Transpiration, and Nutrient Uptake of Pine Seedlings

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Pinus radiata and P. rigida seedlings were grown for 52 days in two soils under three soil-moisture treatments. Daily transpiration losses were recorded and the plants were analyzed for height, weight, Na, Mg, Ca, K, and P at harvesting. Transpiration was lowest in the low soil-moisture treatments. Waterlogging also retarded transpiration. Statistically significant effects due to treatments were shown by certain nutrients and growth parameters. However, there were no consistent treatment effects on growth or nutrient uptake, although the medium soil-moisture treatment was the most favorable in some cases. Phosphorus and water uptake by P. radiata seedlings were studied with radioactive tracers over a 36-hour period. Uptake of tritiated water decreased, but uptake of 32P per unit uptake of tritiated water increased with increasing soil-moisture tension especially in the high and medium treatments. Both long- and short-term experiments showed that transpiration and nutrient uptake were not positively correlated. Forest Sci. 19:281-288.

Keywords: Moisture stress; Pinus radiata; Pinus rigida; radioactive tracers; water use

Document Type: Journal Article

Affiliations: Assistant Professor, Department of Ecology and Behavioral Biology, University of Minnesota, St. Paul, Minn. 55101

Publication date: December 1, 1973

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.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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