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Regeneration of earthworm populations in a degraded soil by natural and planted fallows under humid tropical conditions

dc.contributor.authorTian, G.
dc.contributor.authorOlimah, J.
dc.contributor.authorAdeoye, G.
dc.contributor.authorKang, B.
dc.date.accessioned2019-12-04T11:21:09Z
dc.date.available2019-12-04T11:21:09Z
dc.date.issued2000
dc.identifier.citationTian, G., Olimah, J., Adeoye, G. & Kang, B. (2000). Regeneration of earthworm populations in a degraded soil by natural and planted fallows under humid tropical conditions. Soil Science Society of America Journal, 64(1), 222-228.
dc.identifier.issn0361-5995
dc.identifier.urihttps://hdl.handle.net/20.500.12478/3687
dc.description.abstractEarthworm populations (predominantly Hyperiodrilus africanus and Eudrilus eugeniae) were sampled monthly for 1 yr during 1994 and 1995 in natural regrowth vegetation fallow (dominated by the natural fallow shrub Chromolaena odorata L.), planted fallow (the woody species Senna siamea Lam., Leucaena leucocephala Lam., and Acacia leptocarpa), and intercropped maize (Zea mays L.)–cassava (Manihot esculenta Crantz) established in 1989 in a degraded Alfisol (Oxic paleustalf) in southwestern Nigeria. Compared to leaves of Chromolaena (3.3% N), N concentrations were lower in those of Senna and Acacia, and higher in Leucaena Acacia and Leucaena had higher polyphenol relative to the natural fallow (2%). The lignin was lower in Leucaena than the natural fallow leaves (14%). For 65% of the sampling dates, earthworm numbers under all fallows were significantly higher than under continuous maize–cassava. The mean earthworm numbers (no. m−2) during the rainy season (April–October) decreased in the following order: Chromolaena (147), Senna (131), Leucaena (92), Acacia (80), and maize–cassava (14). Earthworm fresh weights in fallow plots were higher than in the maize–cassava plot, though this was significant for only 4 out of 11 sampling dates. Higher earthworm numbers and biomass in fallow plots were attributed to higher litterfall, lower soil temperature, and higher soil moisture. The mean earthworm numbers were directly correlated with the mean soil moistures (r2 = 0.80, P < 0.05) in fallow plots and N/polyphenol ratios of fallow litterfall (r2 = 0.95, P < 0.05). Increase in earthworm population by fallows led to an increase in leaf-litter decomposition, soil organic matter, available P, and extractable cations and pH; and a decrease in soil bulk density and penetrometer resistance in the fallow plots.
dc.language.isoen
dc.subjectVegetation
dc.subjectNutrient
dc.subjectBiomass
dc.subjectEarthworm Population
dc.subjectSoil Organic Matter
dc.subjectFarmers
dc.titleRegeneration of earthworm populations in a degraded soil by natural and planted fallows under humid tropical conditions
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Ibadan
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectSoil Fertility
cg.iitasubjectSoil Information
cg.iitasubjectSoil Health
cg.iitasubjectIntegrated Soil Fertility Management
cg.iitasubjectNutrition
cg.iitasubjectFood Security
cg.iitasubjectCrop Husbandry
cg.iitasubjectLivelihoods
cg.iitasubjectFarm Management
cg.iitasubjectPlant Production
cg.iitasubjectHandling, Transport, Storage And Protection Of Agricultural Products
cg.iitasubjectAgribusiness
cg.iitasubjectCapacity Development
cg.iitasubjectSmallholder Farmers
cg.accessibilitystatusLimited Access
local.dspaceid95842
cg.identifier.doihttps://doi.org/10.2136/sssaj2000.641222x


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