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Published online 1 January 2007
Published in Soil Sci Soc Am J 71:214-218 (2007)
DOI: 10.2136/sssaj2004.0376
© 2007 Soil Science Society of America
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Emission of Nitrogen Gas, Nitrous Oxide, and Carbon Dioxide on Rehydration of Dry Feathermosses

N. A. Startsev* and V. J. Lieffers

Dep. of Renewable Resources, Faculty of Agric. Forestry and Home Econ., Univ. of Alberta, Edmonton, AB, Canada, T6G 2H1


Figure 1
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Fig. 1. Locations of the moss collection sites. Samples were collected in July 2000.

 

Figure 2
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Fig. 2. Emission of N2 and N2O from the moss tissue that remained continuously moist or from mosses that were dried and rewetted (expressed in mg N per kg of the dry moss tissue). The treatments are: C, control (continuously moist); F, fertilized moss (continuously moist); D, moss dried before the experiment; FD, moss fertilized and dried before the experiment (n = 12). Error bars indicate 1 SE.

 

Figure 3
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Fig. 3. Emission of CO2 from moss tissue subjected to fertilization and/or a single drying/rewetting cycle (expressed in kg/kg of the dry moss tissue, after 20 h of incubation). Treatments are: C, control (continuously moist); F, fertilized moss (continuously moist); D, moss dried before the experiment; FD, moss fertilized and dried before the experiment (n = 12). Error bars indicate 1 SE.

 

Figure 4
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Fig. 4. Loss of mass of fertilized and unfertilized feathermoss over repeated dry–wet cycles. Weight of the moss samples after each drying was compared with the initial air-dry weight (i.e., the first drying time), and the weight differences were estimated as a fraction of the initial weight. Error bars indicate 1 SE.

 

Figure 5
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Fig. 5. Sugar and starch concentrations in the moss tissue after five repeated dry–wet cycles. Treatments are: C, control (not subjected to dry–wet cycles); F, fertilized moss (not subjected to dry–wet cycles); D, subjected to five dry–wet cycles; FD, moss fertilized and subjected to five dry–wet cycles (n = 12). Error bars indicate 1 SE.

 





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