Replenishment of C, N, and P in a Degraded Alfisol Under Humid Tropical Conditions: Effect of Fallow Species and Litter Polyphenols

Tian, Guangming; Salako, F. K.; Ishida, Fusako

doi:10.1097/00010694-200109000-00005

Cited by 24 publications

(13 citation statements)

References 23 publications

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“…1a). This improvement is usually associated with litter accumulation and fine root turn over during the fallow period as reported in other studies (Rao et al 1998;Tian et al 2001). Soil organic carbon under A. mangium (1.3%) and under A. nilotica (1.1%) was higher than in soils under the natural fallow (0.9%), but similar to those found in the natural Miombo soils of semi-arid areas of Tanzania (Msanya et al 2003;Dondeyne et al 2004).…”

Section: Changes In Soil Nutrientssupporting

confidence: 74%

Nutrient use efficiency and biomass production of tree species for rotational woodlot systems in semi-arid Morogoro, Tanzania

et al. 2007

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Frequent nutrient removals accompanying wood and crop harvests from rotational woodlot systems may contribute to declining site productivity and sustainability because of soil nutrient depletion. However, selecting for nutrient-efficient tree species may well sustain productivity under this system. To test this hypothesis, a randomized complete block experiment was adopted to assess effects of five tree species on soil nutrients status, nutrient use efficiency and wood yield in semi-arid Tanzania. After 5 years rotation, top soils under Gliricidia sepium (Jaqua), Acacia polyacantha Willd. and Acacia mangium Willd. were the most fertile with soil organic carbon and exchangeable cation status raised close to those in natural Miombo systems. Soil inorganic N and extractable P levels reached sufficiency levels for subsequent maize culture. Wood productivity in tree fallows averaged three times higher than that of Miombo woodlands indicating the high potential of the woodlot system to supply fuelwood, and consequently relieve harvesting pressures on the natural forests. Acacia crassicarpa A. Cunn. ex Benth. produced the most wood (51 Mg ha À1 ) at low nutrient ''costs'' presumably due to high nutrient use efficiency. Wood yield of this species was 42 and 120% greater than that of A. polyacantha and A. nilotica, respectively, but contained comparatively less nutrients (42-60% less for P, K, and Ca). Gliricidia sepium and A. polyacantha returned the largest amount of nutrients through slash at harvests. Of all test species, A. crassicarpa exhibited the most promise to sustain wood production under rotational woodlot systems due to relatively high productivity and low nutrient export at harvest.

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Section: Changes In Soil Nutrientssupporting

confidence: 74%

Nutrient use efficiency and biomass production of tree species for rotational woodlot systems in semi-arid Morogoro, Tanzania

et al. 2007

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“…The high lignin content in fresh litter of a semi-deciduous rain forest slows decomposition processes of the litter (Bernhard-Reversat and Schwartz 1997). Moreover, plant polyphenols also govern the replenishment of SOC by slowing the decomposition process (Tian et al 2001). The most degraded system, namely food crops had a lower soil pH value compared to forest and tree-based systems, expressing soil acidification due to its recurrent use.…”

Section: Discussionmentioning

confidence: 99%

Effect of land-use on the earthworm assemblages in semi-deciduous forests of Central-West Ivory Coast

et al. 2010

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In this study, the impact of forest disturbance on earthworm assemblages was assessed using monoliths dug out at 5 m intervals along a gradient of land-use intensification. The land-use types comprised primary forest (as a baseline), secondary forest, tree plantation, fallow, perennial and annual crop. Forest disturbance resulted in a significant decrease in soil organic carbon and pH, while earthworm abundance and biomass increased along the gradient of disturbance. Surprisingly, anthropogenic disturbances in semideciduous forest areas have not led to the disappearance of native species to the benefit of exotic species as revealed in former studies. As a result, in this study land-use change had no impact on species richness at the landscape level, even if at local scales, recurrent Chromolaena odorata fallows, multispecies tree plantations and 4 year-old teak plantations hosted the highest average species richness. Multiple regression analyses performed between earthworm communities and environmental variables showed that soil organic carbon and pH are potential indicators of earthworm abundance change.

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“…Polyphenolics have multifaceted effects in soil systems. Effects include slowing organic matter decomposition (Zibilske and Materon, 2005) and slowing N mineralization (Tian et al, 2001), and have been purported to affect plant succession (Schimel et al, 1996).…”

Section: Water Extractable Polyphenolicsmentioning

confidence: 99%

Oxygen Effects on Carbon, Polyphenols, and Nitrogen Mineralization Potential in Soil

Zibilske

Bradford

2007

Soil Science Soc of Amer J

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Crop residue decomposition is affected by environmental factors and residue biochemical properties. These factors may contribute to management protocols that enhance soil organic matter accumulation in hot climates, which have characteristically high oxidation rates. The purpose of this experiment was to determine O2 effects on soil polyphenol oxidase (PPO), peroxidase (PO), water‐soluble polyphenolics (WEP), arginine ammonification (ARG), and water‐extractable C (WEC). Cowpea (Vigna unguiculata L.) and sorghum [Sorghum bicolor (L.) Moench] residues in soil were incubated with headspace O2 concentrations of 0.5, 10, or 21% (ambient) for up to 110 d. The PPO and PO were negatively related to WEP and WEC, mostly at 10 and 21% (P < 0.05). The WEP and WEC were significantly (P < 0.05) and negatively related to O2 concentration. The WEP ranged from 0.5 mg kg−1 soil at 0.5% O2 to near 0 at 10 and 21% O2 The WEC ranged from about 350 mg C kg−1 soil at 0.5% O2 to <25 mg C kg−1 soil at 10 and 21% O2 The ARG rates were also negatively related to O2 level with cowpea, but not as strongly as with sorghum. The ARG and WEC were negatively correlated. The ARG ranged from 6 mg N kg−1 soil at 0.5% O2 to <0.5 mg N kg−1 soil at 21% O2 through 110 d. The WEC and WEP varied independently during incubation. Our results suggest that soil organic C accumulation may be stimulated by (i) using cover crops with higher polyphenolic content, which could slow C mineralization, and (ii) restricting soil O2 availability via reduced tillage.

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Replenishment of C, N, and P in a Degraded Alfisol Under Humid Tropical Conditions: Effect of Fallow Species and Litter Polyphenols

Cited by 24 publications

References 23 publications

Nutrient use efficiency and biomass production of tree species for rotational woodlot systems in semi-arid Morogoro, Tanzania

Nutrient use efficiency and biomass production of tree species for rotational woodlot systems in semi-arid Morogoro, Tanzania

Effect of land-use on the earthworm assemblages in semi-deciduous forests of Central-West Ivory Coast

Oxygen Effects on Carbon, Polyphenols, and Nitrogen Mineralization Potential in Soil

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