Factors affecting nitric oxide and nitrous oxide emissions from ...
Factors affecting nitric oxide and nitrous oxide emissions from ...
Factors affecting nitric oxide and nitrous oxide emissions from ...
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Figure 5.6 Soil NO2 - -N concentrations over time following urine application to soil at 4 different<br />
WFPS (n = 9, error bars are ± the s.e.m.). .........................................................................76<br />
Figure 5.7 Mesh plot showing the interaction between WFPS <strong>and</strong> temperature on soil NO2 - -N<br />
concentrations. Values are treatment means over the entire experimental period.............77<br />
Figure 5.8 Mesh plots of soil NO2 - -N concentrations versus time <strong>and</strong> soil WFPS following urine<br />
application to soil at 3 different temperatures (a) 5 o C, (b) 15 o C, (c) 22 o C. .......................78<br />
Figure 5.9 Soil NO3 - -N concentrations versus time following urine application to soil at 3<br />
different temperatures (n = 12, error bars are ± the s.e.m.). ..............................................82<br />
Figure 5.10 Soil NO3 - -N concentrations versus time following urine application to soil at 4<br />
different WFPS (n = 9, error bars are ± the s.e.m.). ..........................................................83<br />
Figure 5.11 Mesh plot showing the interaction between soil WFPS <strong>and</strong> temperature on soil NO3 - -<br />
N concentrations. ...............................................................................................................83<br />
Figure 5.12 Mesh plots of soil NO3 - -N concentrations versus time <strong>and</strong> soil WFPS after urine<br />
application to soil at 3 different temperatures (a) 5 o C, (b) 15 o C, (c) 22 o C. .......................84<br />
Figure 5.13 Net NH4 + -N depletion <strong>and</strong> net NO3 - -N accumulation (ng g -1 soil h -1 ) in urine affected<br />
soil as influenced by soil temperature treatments (n = 12, error bars are ± the s.e.m.). ....86<br />
Figure 5.14 Net NH4 + -N depletion <strong>and</strong> net NO3 - -N accumulation (ng g -1 soil h -1 ) in urine affected<br />
soil as influenced by soil WFPS treatments (n = 9, error bars are ± the s.e.m.)................86<br />
Figure 5.15 Soil NH4 + -N : NO3 - -N ratio versus time at 3 different temperatures (n = 12, error bars<br />
are ± the s.e.m.)..................................................................................................................87<br />
Figure 5.16 Soil NH4 + -N : NO3 - -N ratio versus time at 4 different WFPS (n = 9, error bars are ±<br />
the s.e.m.)...........................................................................................................................88<br />
Figure 5.17 Mesh plot of soil WFPS <strong>and</strong> temperature versus the soil NH4 + -N : NO3 - -N ratio<br />
following urine application................................................................................................88<br />
Figure 5.18 Surface soil pH over time after urine application to soil at 3 different temperatures (n<br />
= 12, error bars are ± the s.e.m.)........................................................................................90<br />
Figure 5.19 Surface soil pH over time after urine application to soil at 4 different WFPS (n = 9,<br />
error bars are ± the s.e.m.). ................................................................................................90<br />
Figure 5.20 Soil HNO2 concentration versus time following urine application to soil at 3 different<br />
temperatures (n = 12, error bars are ± the s.e.m.). .............................................................91<br />
Figure 5.21 Soil HNO2 concentration versus time following urine application to soil at 4 levels of<br />
WFPS (n = 9, error bars are ± the s.e.m.) ..........................................................................92<br />
Figure 5.22 Soil NO-N flux versus time following urine application to soil at 3 different<br />
temperatures (n = 12, error bars are ± the s.e.m.).Values are means over WFPS. ............94<br />
Figure 5.23 Soil NO-N flux versus time following urine application to soil at levels of WFPS (n =<br />
9, error bars are ± the s.e.m.). Values are means over soil temperature. ...........................94<br />
Figure 5.24 Mesh plots of soil NO-N flux versus time <strong>and</strong> soil WFPS following urine application<br />
to soil at 3 different temperatures (a) 5 o C, (b) 15 o C, (c) 22 o C...........................................95<br />
Figure 5.25 Mesh plot showing the interaction of soil WFPS <strong>and</strong> temperature verses soil NO-N<br />
fluxes. Values are the means over the 35 day sample period. ...........................................96<br />
Figure 5.26 Cumulative NO-N fluxes, as a percentage of urine-N applied after 35 days, versus soil<br />
WFPS at 3 different temperature treatments (n = 3, error bars are ± s.e.m.).....................96<br />
Figure 5.27 Q10(5-15 o C) values for NO-N at different WFPS during experiment (n = 9, error bars<br />
are ± the s.e.m.)..................................................................................................................97<br />
Figure 5.28 Q10(15-22 o C) values for NO-N at different WFPS during experiment (n = 9, error bars<br />
are ± the s.e.m.)..................................................................................................................98<br />
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