Details
| Original language | English |
|---|---|
| Article number | 012160 |
| Number of pages | 12 |
| Journal | IOP Conference Series: Earth and Environmental Science |
| Volume | 648 |
| Issue number | 1 |
| Publication status | Published - 22 Feb 2021 |
| Externally published | Yes |
| Event | 1st International Conference on Sustainable Tropical Land Management, ICSTLM 2020 - Bogor, Indonesia Duration: 16 Sept 2020 → 18 Sept 2020 |
Abstract
Soil aggregation is an important indicator of soil quality and highly responsive to management such as application of organic amendments. Compost generally increases aggregate stability and enhances soil microbial activity, while the effects of biochar on these factors remain inconclusive. We investigated the effect of biochar and compost on soil aggregation and microbial abundance at an experimental soil rehabilitation site in Ngaoundéré, Cameroon. Sampling was carried out 3.5 years after installation of the site. Both amendments improved bulk density, hydraulic conductivity, pH, and base saturation. Cation exchange capacity and soil organic matter (SOM) content were rather a function of soil texture than influenced by the amendments. Bacterial abundance increased in the compost, but not in the biochar treatment. Fungi were more frequent in smaller aggregates, but did not respond to the treatments. Macroaggregates 400 - 2,000 µm contributed ca. 75 % of the soil functions assessed. Yet, SOM content was 4 times higher in microaggregates < 50 µm than in macroaggregates throughout all treatments. We conclude that single applications of organic amendments can have positive long-term effects on soil aggregation in undisturbed degraded soils, particularly in the macroaggregate fraction. Microaggregates harbour fungal hyphae and are rich in SOM, independent of amendments.
ASJC Scopus subject areas
- Environmental Science(all)
- General Environmental Science
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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In: IOP Conference Series: Earth and Environmental Science, Vol. 648, No. 1, 012160, 22.02.2021.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Long-term impact of single biochar and compost application on soil aggregation
AU - Schnee, L. S.
AU - Koehler, H.
AU - Ngakou, A.
AU - Eickhorst, T.
N1 - Publisher Copyright: © Published under licence by IOP Publishing Ltd.
PY - 2021/2/22
Y1 - 2021/2/22
N2 - Soil aggregation is an important indicator of soil quality and highly responsive to management such as application of organic amendments. Compost generally increases aggregate stability and enhances soil microbial activity, while the effects of biochar on these factors remain inconclusive. We investigated the effect of biochar and compost on soil aggregation and microbial abundance at an experimental soil rehabilitation site in Ngaoundéré, Cameroon. Sampling was carried out 3.5 years after installation of the site. Both amendments improved bulk density, hydraulic conductivity, pH, and base saturation. Cation exchange capacity and soil organic matter (SOM) content were rather a function of soil texture than influenced by the amendments. Bacterial abundance increased in the compost, but not in the biochar treatment. Fungi were more frequent in smaller aggregates, but did not respond to the treatments. Macroaggregates 400 - 2,000 µm contributed ca. 75 % of the soil functions assessed. Yet, SOM content was 4 times higher in microaggregates < 50 µm than in macroaggregates throughout all treatments. We conclude that single applications of organic amendments can have positive long-term effects on soil aggregation in undisturbed degraded soils, particularly in the macroaggregate fraction. Microaggregates harbour fungal hyphae and are rich in SOM, independent of amendments.
AB - Soil aggregation is an important indicator of soil quality and highly responsive to management such as application of organic amendments. Compost generally increases aggregate stability and enhances soil microbial activity, while the effects of biochar on these factors remain inconclusive. We investigated the effect of biochar and compost on soil aggregation and microbial abundance at an experimental soil rehabilitation site in Ngaoundéré, Cameroon. Sampling was carried out 3.5 years after installation of the site. Both amendments improved bulk density, hydraulic conductivity, pH, and base saturation. Cation exchange capacity and soil organic matter (SOM) content were rather a function of soil texture than influenced by the amendments. Bacterial abundance increased in the compost, but not in the biochar treatment. Fungi were more frequent in smaller aggregates, but did not respond to the treatments. Macroaggregates 400 - 2,000 µm contributed ca. 75 % of the soil functions assessed. Yet, SOM content was 4 times higher in microaggregates < 50 µm than in macroaggregates throughout all treatments. We conclude that single applications of organic amendments can have positive long-term effects on soil aggregation in undisturbed degraded soils, particularly in the macroaggregate fraction. Microaggregates harbour fungal hyphae and are rich in SOM, independent of amendments.
UR - http://www.scopus.com/inward/record.url?scp=85102255785&partnerID=8YFLogxK
U2 - 10.1088/1755-1315/648/1/012160
DO - 10.1088/1755-1315/648/1/012160
M3 - Conference article
AN - SCOPUS:85102255785
VL - 648
JO - IOP Conference Series: Earth and Environmental Science
JF - IOP Conference Series: Earth and Environmental Science
SN - 1755-1307
IS - 1
M1 - 012160
T2 - 1st International Conference on Sustainable Tropical Land Management, ICSTLM 2020
Y2 - 16 September 2020 through 18 September 2020
ER -