Aeration as influenced by soil structure dynamics: a contribution to improve the acquisition of nutrients from the subsoil
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Kiel
Inst. für Pflanzenernährung und Bodenkunde der Christian-Albrechts-Univ.
2013
|
| Schriftenreihe: | Schriftenreihe / Institut für Pflanzenernährung und Bodenkunde, Universität Kiel
98 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Zsfassung in dt. Sprache |
| Beschreibung: | 133 S. Ill., graph. Darst. |
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Datensatz im Suchindex
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Titel: Aeration as influenced by soil structure dynamics
Autor: Uteau Puschmann, Daniel
Jahr: 2013
Table of contents
List of abbreviations and symbols.17
SUMMARY.19
KURZFASSUNG.20
1. First chapter: Introduction and hypothesis.23
1.1. General introduction.25
1.1.1 Soil structure and its importance on environmental factors.25
1.1.2 Abiotic and biotic factors affecting aggregate formation.25
1.1.3 Abiotic and biological factors affecting pore formation.27
1.1.4 Air transport mechanisms in soils.30
1.1.5 Pore functionality for air transport.34
1.1.6 Aeration influence on plant growth.35
1.1.7 Soil structure: the scale factor.37
1.2. Hypothesis and objectives.38
1.2.1 Hypothesis 1: Physical soil properties regarding transport processes of gas
and water in the pedon scale are a function of preceding crop sequences and
the ability of their root architectures in generate specific pore networks.39
1.2.2 Hypothesis II: Soil aeration parameters such as air-filled porosity, air
permeability and gas diffusion are result of a distinctive pore network which
develops in time (in a scale of years) and extension (in a scale of
centimeters).39
1.2.3 Hypothesis III: Redox potential dynamics are closely related to millimeter
space pÛ2 variability resulted from root respiration and microbial activity
hotspots near the root surface. In the rhizosphere, pÛ2 varies in a time scale
of hours as a function of matric potential.40
1.3. Literature.40
2. Second chapter: Improving subsoil water and gas transport by root drilling of three
preceeding fodder crops.47
2.1. Introduction.50
2.2. Materials and Methods.52
2.2.1 Experimental field description and soil sampling.52
2.2.2 Laboratory measurements.53
2.2.3 In situ measurements.55
2.2.4 Statistical analyses.57
2.3. Results.57
2.3.1 Effect of plant growth and composition on physical soil properties.57
2.3.2 Water and air content modeling.62
2.4. Discussioa.66
2.4.1 Root influence on soil physical properties.66
2.4.2 Modeled water and gas dynamics in dependence to the biological tillage
treatments.68
2.5. Conclusions.69
2.6. Acknowledgements.70
2.7. Literature.70
3. Third chapter: Root and time dependant soil structure formation and its influence on
gas transport in the subsoil.75
3.1. Introduction.78
3.2. Methods.81
3.2.1 Field description and soil sampling.81
3.2.2 Air permeability and gas diffusion measurements.81
3.2.3 Estimation of relative diffusion coefficients and pore geometry indices.83
3.2.4 Statistical analysis.84
3.3. Results.85
3.3.1 Advective and diffusive gas transport.85
3.3.2 Models for gas transport prediction.88
3.3.3 Continuity and tortuosity.89
3.4. Discussion.90
3.5. Conclusions.94
3.6. Acknowledgements.94
3.7. Literature.94
4. Fourth chapter: Rhizosphere effects of alfalfa on oxygen and redox dynamics in a
homogenized Luvisol.99
4.1. Introduction.102
4.2. Materials and Methods.104
4.2.1 Joint compartment experiment (JoiCEJ.104
4.2.2 Oxygen and redox potential profiles and monitoring.105
4.2.3 Carbon and pH profiles.106
4.2.4 Estimation of soil hydraulic parameters and oxygen diffusivity for the
calculation of soil respiration.106
4.3. Results.107
4.3.1 Hydraulic parameter estimations.107
4.3.2 Spatial gradients of oxygen in the rhizosphere depending on soil moisture 109
4.3.3 Dynamics of oxygen and redox potential.Ill
4.3.4 pH and C content in dependence of the distance to the root surface.112
4.3.5 Oxygen consumption in the rhizosphere as function of matric potential.112
4.4. Discussioa.113
4.4.1 Oxygen distribution in the rhizosphere.113
4.4.2 Redoxpotential dynamics in dependence of matric potential.115
4.4.3 Total C and pH gradients from the root surface.116
4.5. Conclusions.117
4.6. Acknowledgements.117
4.7. Literature.117
5. Fifth chapter: General discussion.121
5.1 Discussion.123
5.1.1 Abiotic and biological factors affecting aggregate and pore formation.123
5.1.2 Pore functionality and air transport mechanisms in soils.126
5.1.3 Significance of aeration and pore formation to root growth and nutrient
acquisition.128
Acknowledgements.133
Appendix I: Other works of the author.135
Appendix II: Curriculum vitae.141 |
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| discipline | Agrarwissenschaft Agrar-/Forst-/Ernährungs-/Haushaltswissenschaft / Gartenbau Pflanzenbau Geographie |
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| spelling | Uteau Puschmann, Daniel 1980- Verfasser (DE-588)1048538591 aut Aeration as influenced by soil structure dynamics a contribution to improve the acquisition of nutrients from the subsoil vorgelegt von Daniel Uteau Puschmann Kiel Inst. für Pflanzenernährung und Bodenkunde der Christian-Albrechts-Univ. 2013 133 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Schriftenreihe / Institut für Pflanzenernährung und Bodenkunde, Universität Kiel 98 Zsfassung in dt. Sprache Zugl.: Kiel, Univ., Diss., 2013 Boden-Pflanze-System (DE-588)4274826-4 gnd rswk-swf Bodenluft (DE-588)4454255-0 gnd rswk-swf Bodenatmung (DE-588)4389796-4 gnd rswk-swf Nährstoffaufnahme (DE-588)4171098-8 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Bodenatmung (DE-588)4389796-4 s Bodenluft (DE-588)4454255-0 s Boden-Pflanze-System (DE-588)4274826-4 s Nährstoffaufnahme (DE-588)4171098-8 s DE-604 Institut für Pflanzenernährung und Bodenkunde, Universität Kiel Schriftenreihe 98 (DE-604)BV001898129 98 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027259667&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Uteau Puschmann, Daniel 1980- Aeration as influenced by soil structure dynamics a contribution to improve the acquisition of nutrients from the subsoil Boden-Pflanze-System (DE-588)4274826-4 gnd Bodenluft (DE-588)4454255-0 gnd Bodenatmung (DE-588)4389796-4 gnd Nährstoffaufnahme (DE-588)4171098-8 gnd |
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| title | Aeration as influenced by soil structure dynamics a contribution to improve the acquisition of nutrients from the subsoil |
| title_auth | Aeration as influenced by soil structure dynamics a contribution to improve the acquisition of nutrients from the subsoil |
| title_exact_search | Aeration as influenced by soil structure dynamics a contribution to improve the acquisition of nutrients from the subsoil |
| title_full | Aeration as influenced by soil structure dynamics a contribution to improve the acquisition of nutrients from the subsoil vorgelegt von Daniel Uteau Puschmann |
| title_fullStr | Aeration as influenced by soil structure dynamics a contribution to improve the acquisition of nutrients from the subsoil vorgelegt von Daniel Uteau Puschmann |
| title_full_unstemmed | Aeration as influenced by soil structure dynamics a contribution to improve the acquisition of nutrients from the subsoil vorgelegt von Daniel Uteau Puschmann |
| title_short | Aeration as influenced by soil structure dynamics |
| title_sort | aeration as influenced by soil structure dynamics a contribution to improve the acquisition of nutrients from the subsoil |
| title_sub | a contribution to improve the acquisition of nutrients from the subsoil |
| topic | Boden-Pflanze-System (DE-588)4274826-4 gnd Bodenluft (DE-588)4454255-0 gnd Bodenatmung (DE-588)4389796-4 gnd Nährstoffaufnahme (DE-588)4171098-8 gnd |
| topic_facet | Boden-Pflanze-System Bodenluft Bodenatmung Nährstoffaufnahme Hochschulschrift |
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