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Comparative effects of dominant forest tree species on soil characteristics and microbial biomass

100%

Yohannes Y., Shibistova O. B., Guggenberger G.

International Letters of Natural Sciences

2020

tom 78

Tree species differ in litter quality and belowground biomass, thereby exerting species-specific impact on soil properties and microbial biomass. A study was conducted to find out the comparative effects of Podocarpus falcatus and Croton macrostachys on basic soil characteristics and microbial biomass, in the Munessa forest, Ethiopia. Four experimental plots under the canopies the respected tree species (two from each) were established for sample collection. From these plots, soil samples were collected from a depth 0-10 cm and 10-25 cm. The results showed that, from the depth 0-10 cm, concentration of organic carbon (C) and nitrogen (N) was larger under C. macrostachys and from the depth 10-25 cm these values were greater under P. falcatus. There was significant difference (p < 0.05) in cation exchange capacity being larger under C. macrostachys. There were no differences in microbial composition between the plots. However, the total phospholipid fatty acids (PLFA) concentration as an entry for microbial biomass determination tended to be significantly larger in soil under Podocarpus plots (382.7 ± 60.9 nmol PLFA g⁻¹ dry soil) vs. 262.2 ± 32.8 nmol PLFA g⁻¹ dry soil (Croton plots). The varying impacts of tree species on soil characteristics and microbial biomass may be partly explained by differences in functional traits related to life-history strategy of the respected species.

Indiscriminate devegetation under improper farming system: a root cause for surface and underground water and food crisis in Ethiopia

59%

Jiru D.

International Journal of Ecohydrology and Hydrobiology

2010

tom 10

nr 2-4

Deforestation has caused surface and underground water imbalance in the hydrologic cycle followed by subsequent food, feed and wood productivity crisis. This paper reviews the role of traditional farming systems in wet and dry agroecology. It further compares it with existing improper farming practice, which productivity is examined from agroecology based climatic and edaphic perspective. Experiments were carried out to determine the amount of rainfall intercepted by dominant trees on farm, namely by Cordia africana, Afrocarpus falcatus, Millettia ferruginea, Juniperus procera, Syzygium guineense, Olea europaea subsp. cuspidata, Acacia albida, Albizia gummifera and Moringa stenopetala. Deep rooted trees planted on farms are found to be sources of feed, food and moisture conservers, that sustain and boost production in moisture scarce agriculture. Under irrigation they are found to be good for salinity protection and marginal land reclamation. Soil infiltration data from secondary sources were examined for cultivated area, wood land and open overgrazed pasture in central Rift Valley. The relative infiltration rates are highest for grasslands. This research work is intended to initiate interdisciplinary networking approach in water and natural resource conservation, proper land use potential development and environmental sustainability.

Ograniczanie wyników

1 International Journal of Ecohydrology and Hydrobiology

1 International Letters of Natural Sciences

1 Guggenberger G.

1 Jiru D.

1 Shibistova O. B.

1 Yohannes Y.

1 2020

1 2010

Wyniki wyszukiwania

Comparative effects of dominant forest tree species on soil characteristics and microbial biomass

Indiscriminate devegetation under improper farming system: a root cause for surface and underground water and food crisis in Ethiopia