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- W263308596 abstract "Native red spruce and loblolly pine soils were amended with either 0, 150, 300, 600 and 1200 mg/kg lead as lead chloride. Six-month-old spruce and six-week-old pine seedlings were treated for 19 weeks with simulated rain of either pH 4.5 or 3.0. Rain was applied directly to the soils at a rate of 1.5 cm per week. Photosynthesis (mg CO/sub 2/ hr/sup -1/g/sup -1/), height, and needle, shoot and root weight were measured at the completion of the experiment. Rain pH had no significant effect on the growth of either species. However, red spruce photosynthesis was higher at a rain pH of 3.0, averaging 2.7 compared to 2.0 at pH 4.5. Loblolly pine photosynthesis exhibited the same pattern but differences were not significant. Growth and photosynthesis of red spruce were reduced even at the lowest lead level with additional lead resulting in successive reduction. Photosynthesis ranged from 3.7 in control seedlings to 1.5 at the 1200 mg/kg lead level. Loblolly pine growth was less sensitive to lead with growth being reduced only at the higher concentrations. Loblolly pine photosynthesis exhibited no decline even at the highest lead level." @default.
- W263308596 created "2016-06-24" @default.
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- W263308596 date "1986-04-01" @default.
- W263308596 modified "2023-09-25" @default.
- W263308596 title "Photosynthesis and biomass of red spruce and loblolly pine seedlings as influenced by soil lead and acidic deposition" @default.
- W263308596 hasPublicationYear "1986" @default.
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