Water infiltration under different land use in miombo woodlands outside Morogoro, Tanzania
Infiltration capacity is a measure of how much water that can enter the soil and hence become available to plant roots and micro organisms. A high infiltration capacity also means that less water is available for runoff and subsequent erosion. Infiltration capacity, bulk density and soil organic car...
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| Formato: | L3 |
| Lenguaje: | Inglés sueco |
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SLU/Dept. of Forest Ecology and Management
2008
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| Materias: |
| _version_ | 1855572028645441536 |
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| author | Nord, Helena |
| author_browse | Nord, Helena |
| author_facet | Nord, Helena |
| author_sort | Nord, Helena |
| collection | Epsilon Archive for Student Projects |
| description | Infiltration capacity is a measure of how much water that can enter the soil and hence become available to plant roots and micro organisms. A high infiltration capacity also means that less water is available for runoff and subsequent erosion. Infiltration capacity, bulk density and soil organic carbon content were measured in six land use types in miombo woodlands; natural forest, degraded forest, intensive agriculture, abandoned agriculture, degraded regenerating forest and Albizia plantation. The measurements were carried out in miombo woodlands about 50 km west of Morogoro, Tanzania. In the intensive agriculture and the abandoned agriculture the higher infiltration capacity was created by the mechanical disturbance and in the abandoned agricultural case also by the subsequent dense grass vegetation. The mechanical disturbance is, together with the presence of the tree roots, probably the cause of the high infiltration capacity in the Albizia plantation. Since the infiltration capacity increased after the establishment of an Albizia plantation, as well as the ability of the soil to receive high intensity rain increased when a degraded forest was left to regenerate and an Albizia plantation was established, this suggests that improved vegetation on a previously degraded land is positive. The mechanical disturbance created a low bulk density in the intensive agriculture and the abandoned agriculture; the dense grass may also have caused the bulk density in the abandoned agriculture to be the lowest of all land uses. Since a large number of measurements have been performed in this study it is also possible to estimate the variation within the land uses. The analysis showed that the variation within the intensive agriculture was significantly higher than in the natural forest, which may be a result of the mechanical disturbance in the intensive agriculture and a small variation in the natural forest. |
| format | L3 |
| id | RepoSLU12251 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés swe |
| publishDate | 2008 |
| publishDateSort | 2008 |
| publisher | SLU/Dept. of Forest Ecology and Management |
| publisherStr | SLU/Dept. of Forest Ecology and Management |
| record_format | eprints |
| spelling | RepoSLU122512017-11-01T12:31:19Z Water infiltration under different land use in miombo woodlands outside Morogoro, Tanzania Nord, Helena miombo land use management infiltration capacity steady state infiltrability bulk density soil organic carbon agriculture Albizia double-ring infiltrometer wet combustion Infiltration capacity is a measure of how much water that can enter the soil and hence become available to plant roots and micro organisms. A high infiltration capacity also means that less water is available for runoff and subsequent erosion. Infiltration capacity, bulk density and soil organic carbon content were measured in six land use types in miombo woodlands; natural forest, degraded forest, intensive agriculture, abandoned agriculture, degraded regenerating forest and Albizia plantation. The measurements were carried out in miombo woodlands about 50 km west of Morogoro, Tanzania. In the intensive agriculture and the abandoned agriculture the higher infiltration capacity was created by the mechanical disturbance and in the abandoned agricultural case also by the subsequent dense grass vegetation. The mechanical disturbance is, together with the presence of the tree roots, probably the cause of the high infiltration capacity in the Albizia plantation. Since the infiltration capacity increased after the establishment of an Albizia plantation, as well as the ability of the soil to receive high intensity rain increased when a degraded forest was left to regenerate and an Albizia plantation was established, this suggests that improved vegetation on a previously degraded land is positive. The mechanical disturbance created a low bulk density in the intensive agriculture and the abandoned agriculture; the dense grass may also have caused the bulk density in the abandoned agriculture to be the lowest of all land uses. Since a large number of measurements have been performed in this study it is also possible to estimate the variation within the land uses. The analysis showed that the variation within the intensive agriculture was significantly higher than in the natural forest, which may be a result of the mechanical disturbance in the intensive agriculture and a small variation in the natural forest. Infiltrationskapaciteten är ett mått på hur mycket vatten som kan tas upp av en jord och därmed bli tillgänglig för växtrötter och mikroorganismer. En god infiltrationskapacitet innebär därför att det finns mindre vatten kvar som kan orsaka ytavrinning och erosion. Infiltrationskapacitet, bulkdensitet och andel organiskt kol i marken mättes i sex markanvändningstyper: mindre störd skog, degenererad skog, intensivt jordbruk, övergivet jordbruk, degenererad återuppväxande skog samt Albizia-plantering. Mätningarna utfördes i miombo som är en tropisk torrskog, ca 50 km väster om Morogoro, Tanzania. Mekanisk bearbetning av jorden i det intensiva jordbruket och det övergivna jordbruket samt tätt, högväxande gräs i det övergivna jordbruket har skapat en hög infiltrationskapacitet i dessa markanvändningstyper. Den mekaniska bearbetningen av jorden är tillsammans med närvaron av trädrötter även troligtvis orsaken till den höga infiltrationskapaciteten i Albizia-planteringen. Då infiltrationskapaciteten var större i Albizia-planteringen än i den återuppväxande skogen, liksom jordens förmåga att ta emot regn av hög intensitet ökade efter att den degraderade skogen fick återuppväxa och då Albizia planterades, är det sannolikt att en ökad vegetation på tidigare degenererad mark är positiv. En låg bulkdensitet kan ha skapats i det intensiva jordbruket och det övergivna jordbruket på grund av den mekaniska bearbetningen av jorden. Det täta, högväxande gräset har även gjort att bulkdensiteten för det övergivna jordbruket är den lägsta. Då ett stort antal mätningar har genomförts har infiltrationskapacitetens variation inom markanvändningstyperna kunnat bedömas. Beräkningarna visade att variationen inom det intensiva jordbruket var större än variationen inom den mindre störda skogen, vilket kan bero på den mekaniska bearbetningen av jorden på det intensiva jordbruket och att variationen i den mindre störda skogen var mindre än förväntat. SLU/Dept. of Forest Ecology and Management 2008 L3 eng swe https://stud.epsilon.slu.se/12251/ |
| spellingShingle | miombo land use management infiltration capacity steady state infiltrability bulk density soil organic carbon agriculture Albizia double-ring infiltrometer wet combustion Nord, Helena Water infiltration under different land use in miombo woodlands outside Morogoro, Tanzania |
| title | Water infiltration under different land use in miombo woodlands outside Morogoro, Tanzania |
| title_full | Water infiltration under different land use in miombo woodlands outside Morogoro, Tanzania |
| title_fullStr | Water infiltration under different land use in miombo woodlands outside Morogoro, Tanzania |
| title_full_unstemmed | Water infiltration under different land use in miombo woodlands outside Morogoro, Tanzania |
| title_short | Water infiltration under different land use in miombo woodlands outside Morogoro, Tanzania |
| title_sort | water infiltration under different land use in miombo woodlands outside morogoro, tanzania |
| topic | miombo land use management infiltration capacity steady state infiltrability bulk density soil organic carbon agriculture Albizia double-ring infiltrometer wet combustion |