drivers of soil respiration of root and microbial ... - Unitus DSpace

More documents

Recommendations

Info

54 RS RHET 8 6 6 4 25 4 2 2 25 20 T 20 T 15 15 10 10 5 5 0 0 SWC 0.1 0.2 0.3 0.4 SWC 0.1 0.2 0.3 0.4 Fig. 14 Relationship of total (Rs) and microbial-derived (Rhet) soil respiration with soil temperature (T) and soil water content (SWC) at 5 cm depth for the year 2007. In figure 15 the residuals (measured value – fitted value) of Rs estimation were plotted vs. gross primary production of the day before each measurement. The model clearly underestimates the soil respiration under high values of GPP and overestimates under low. After correction of the residuals for the GPP, the model’ s fitting have slightly improved.
Residuals (µmol m -2 s -1 ) Predicted CO2 (µmol m -2 s -1 ) Predicted CO2 (µmol m -2 s -1 ) 11 10 9 8 7 6 5 4 3 2 1 0 2.0 1.5 1.0 0.5 0.0 -0.5 -1.0 -1.5 -2.0 -2.5 11 10 9 8 7 6 5 4 3 2 1 0 (a) regression line (b) R 2 = 0.59 line 1:1 Measured CO 2 (µmol m -2 s -1 ) 0 1 2 3 4 5 6 7 8 9 10 11 0 2 4 6 8 10 (c) regression line R 2 = 0.73 GPP (µmol m -2 s -1 ) line 1:1 Measured CO 2 (µmol m -2 s -1 ) 0 1 2 3 4 5 6 7 8 9 10 11 Fig. 15 a) Measured vs. predicted CO2 efflux b) Residuals vs. Gross primary production (GPP); c) Measured vs. predicted CO2 efflux including GPP in the model equation. Data of 2006 and 2007 were used. 55
Page 1:
!!"% ( !"+ "!$ (!'! ,' - !"+ "!$ ##
Page 4 and 5: explain diurnal and seasonal change
Page 6 and 7: sull’intensità del flusso respir
Page 8 and 9: 8 3.2.4. Data analyses and definiti
Page 11 and 12: 1. INTRODUCTION AND OVERVIEW 11
Page 13 and 14: times as much carbon as the terrest
Page 15 and 16: Fig. 3 Different soil C pools with
Page 17 and 18: 1.3. Soil respiration sources Soil
Page 19 and 20: conditions, like soil type, plants
Page 21 and 22: For grasslands, the nature, frequen
Page 23 and 24: (a) (b) (c) Fig.7 Amplero (AQ, Ital
Page 25 and 26: magnitude of root respiration and o
Page 27 and 28: efficiency, indicating future posit
Page 29 and 30: approaches for studying of the cont
Page 31 and 32: Houghton R.A., 2003. Revised estima
Page 33: Vleeshouwers L.M., Verhagen A. 2002
Page 36 and 37: 2.1. Introduction 36 Soil respirati
Page 38 and 39: 38 In the year 2005 ten PVC collars
Page 40 and 41: 2.2.4. Biochemical analyses Microbi
Page 42 and 43: 42 Variation of soil respiration fr
Page 44 and 45: CO 2 efflux (mmol m -2 s -1 ) 44 CO
Page 46 and 47: 46 All diurnal measurements of root
Page 48 and 49: 48 Q10 R 2 p Rs 2.51 0.77 0.000 Ra
Page 50 and 51: the photosynthesis and its followin
Page 52 and 53: 2.3.3. Inter-annual variation of so
Page 56 and 57: 2.4. Discussion 2.4.1. Partitioning
Page 58 and 59: measurements, the possibility to fi
Page 60 and 61: and Schlesinger, 1992; Moyano et al
Page 62 and 63: Janssens I.A., Pilegaard K., 2003.
Page 64: Xu X., Kuzyakov Y., Wanek W., Richt
Page 67 and 68: 3.1. Introduction Soil respiration
Page 69 and 70: Our experiment was conducted in a m
Page 71 and 72: Lactic acid 13 C 13 CO2 Root-derive
Page 73 and 74: At the end of the process, the subl
Page 75 and 76: where, MAs - the mean age of the co
Page 77 and 78: 13C of respiration ( o / oo ) 155 1
Page 79 and 80: Total Label Recovered (TLR, %) Ra R
Page 81 and 82: GPP (mmol m -2 s -1 ) 25 20 15 10 5
Page 83 and 84: frequent and possibly they missed t
Page 85 and 86: 3.4.3. Destructive vs. Non-destruct
Page 87 and 88: Gavrichkova O., Kuzyakov Y., 2008.
Page 90 and 91: Chapter source: 90 4. THE EFFCT OF
Page 92 and 93: Bardgett et al. (1997) showed that
Page 94 and 95: 94 Partitioning plots were installe
Page 96 and 97: Microbial C was calculated as a dif
Page 98 and 99: taken from 1 µg N-NO2 ml -1 soluti
Page 100 and 101: ates between clipped and unclipped
Page 102 and 103: Fig. 7 Total (Rs), root (Ra)- and m
Page 104 and 105:
104 Rh, (CO 2 , mmolm -2 s -1 ) 7 6
Page 106 and 107:
Fig. 11 Cumulative microbial respir
Page 108 and 109:
108 After the calculation of synthe
Page 110 and 111:
Fig. 16: a) Relationship between sy
Page 112 and 113:
an annual mowing the measurement wa
Page 114 and 115:
mineral N available to plants and N
Page 116 and 117:
Cambardella C.A., Elliott E.T., (19
Page 118 and 119:
Rice C.W., Moorman T.B., Beare M, 1
Page 120 and 121:
120
Page 122 and 123:
5.1. Introduction 122 Nitrogen (N)
Page 124 and 125:
specie, c) an additional aim was to
Page 126 and 127:
5.2.4. Sampling and analyses 126 Na
Page 128 and 129:
the differences between N and contr
Page 130 and 131:
130 specific root respiration (max
Page 132 and 133:
Fig. 4 a) Intensity of 14 CO2 efflu
Page 134 and 135:
Fig. 6 a) values above zero: root-d
Page 136 and 137:
136 Zea mays: A clear diurnal dynam
Page 138 and 139:
plants. The growth stage could cont
Page 140 and 141:
nitrates. At temperatures of 15 - 2
Page 142 and 143:
experiment could be responsible for
Page 144 and 145:
Horwath W.R., Pretziger K.S., Paul,
Page 146 and 147:
146
Page 148 and 149:
148 6.1 . Introduction In studies o
Page 150 and 151:
Regression analyses technique, whic
Page 152 and 153:
152 The respiratory response with g
Page 154 and 155:
154 100% 80% 60% 40% 20% 0% 85% 13%
Page 156 and 157:
6.3.2. 2008: Mesh- exclusion vs. re
Page 158 and 159:
6.4. Discussion 6.4.1. Mesh-exclusi
Page 160 and 161:
introduction in a small soil sample
Page 162 and 163:
component, expressing a total soil
Page 164 and 165:
Kucera C.L., Kirkham D.R., 1971. So
Page 166:
Acknowledgements This work was poss
show all

drivers of soil respiration of root and microbial ... - Unitus DSpace

Create successful ePaper yourself

Delete template?

Save as template?