Internal oxygen levels decrease during the growing season and with increasing stem height

@article{Eklund2000InternalOL,
  title={Internal oxygen levels decrease during the growing season and with increasing stem height},
  author={Leif Eklund},
  journal={Trees},
  year={2000},
  volume={14},
  pages={177-180}
}
The oxygen levels in the sapwood of Norway spruce [Picea abies Karst. (L.)] trees were measured by GC-MS (gas chromatography – mass spectrometry) as stem growth progressed during the growing season. The measurements were made on 30-year-old, 13–15 m high, trees growing on three plots which were irrigated, left undisturbed or subjected to drought. The oxygen measurements were done at 1.5, 4 and 8 m above the ground. The internal oxygen levels dropped to about 5% of the level in air in irrigated… CONTINUE READING

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