Soil microbial functional capacity and diversity in a millet-shrub intercropping system of semi-arid Senegal

Diakhaté, Sidy; Guèye, Mame Codou; Chevallier, Tiphaine; Diallo, N.H.; Assigbétsé, Komi; Abadie, Josiane; Diouf, M.; Massé, Dominique; Sembène, M; Ndour, Yacine Badiane; Dick, Richard P.; Chapuis‐Lardy, Lydie

doi:10.1016/j.jaridenv.2016.01.010

Cited by 33 publications

(28 citation statements)

References 38 publications

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“…Soil enzyme activities are attractive as soil quality indicators because they are sensitive to soil management and relatively simple and cost effective [31]. Not surprisingly, this study found that year-round shrub management resulted in greater β-glucosidase activity compared to soil collected from outside the shrub area, except for the soils incubated for 45 days (Figure 5), which is consistent with previous studies [1] [10] [11]. However, decreases in β-glucosidase activity after DRW cycles, followed by a subsequent increase back to baseline levels, further suggests greater resiliency of the soil microbial communities collected from beneath the shrub canopy.…”

Section: Microbial Response To Drw Cyclessupporting

confidence: 91%

“…Overall, soils collected from beneath the shrub responded negatively to the disturbance from the DRW cycles, except for available nitrogen. Similar observations were previously reported a negative correlation between imposed water stress and basal respiration [1]. The decreased rates of basal respiration were more noticeable in soils collected outside the shrub canopy, supporting the concept that these shrubs act as "resource islands" [12] and buffer against soil disturbance [1] [5].…”

Section: Microbial Response To Drw Cyclessupporting

confidence: 85%

“…The analyses revealed that soils collected from beneath the shrub had less differences in their microbial and biochemical parameters than soils collected outside the shrub area when subjected to DRW cycles ( Figure 6). There is now considerable evidence that the shrub P. reticulatum increases water availability by performing hydraulic redistribution [13], has higher levels of microbial activity and diversity [1] [2] [10], and suppresses plant parasitic nematodes [24] [38]. Drying and rewetting cycles led to an increase in soil microbial biomass and β-glucosidase activity after 2 days of incubation.…”

Section: Shrub Effects On Microbial Activities Under Drw Effectsmentioning

confidence: 99%

“…To our knowledge, there is very little information on the legacy effects of shrubs impact on microbial responses to DRW disturbances, particularly, in Sub-Saharan Africa. This research builds on Bright [5] and Diakhate [1] findings, which suggest that long-term shrub management can buffer against impacts of climate change and that the soil microbial communities can adapt to water stress. To determine the potential of a long-term shrub presence in buffering impacts of severe disturbance on soil microbial activity, a laboratory experiment was conducted under various temperature and humidity regimes.…”

Section: Introductionmentioning

confidence: 98%

“…In Sub-Saharan Africa, perennial woody shrubs have been shown to significantly influence soil microbial communities in cropped fields of the semi-arid Sahel [1] [2] [3]. A regional meta-analysis reporting the effects of shrub presence in African agricultural fields found an overall positive effect on total soil carbon (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Temporal Microbial Response to Wetting-Drying Cycles in Soils within and Outside the Influence of a Shrub in the Sahel

Diatta¹,

Diakhaté²,

Founoune-Mboup³

et al. 2019

OJSS

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Piliostigma reticulatum is a native woody shrub found in cropped fields in the Sahel and has been shown to increase crop productivity and soil quality. Frequently occurring drying and rewetting cycles (DRW) may alter the soil quality beneath these shrubs. We investigated the effect of DRW cycles on microbial community in soil beneath and outside the P. reticulatum canopy and the roles of this shrub in the adaptation of the microbial community to abiotic stress. Soils were incubated in a climate controlled chamber for 45 days, after exposure to 10 consecutive days of DRW cycles at 75% of water holding capacity (WHC). Basal respiration, β-glucosidase activity, microbial biomass carbon (MB C ), and available nitrogen ( 4

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Section: Microbial Response To Drw Cyclessupporting

confidence: 91%

Section: Microbial Response To Drw Cyclessupporting

confidence: 85%

Section: Shrub Effects On Microbial Activities Under Drw Effectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Temporal Microbial Response to Wetting-Drying Cycles in Soils within and Outside the Influence of a Shrub in the Sahel

Diatta¹,

Diakhaté²,

Founoune-Mboup³

et al. 2019

OJSS

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Microbial community shifts in pearl millet root zone soils with Guiera senegalensis intercropping along a rainfall and soil type gradient in the Sahel

Mason

Debenport

DeLay

et al. 2023

Soil Science Soc of Amer J

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The Sahel of West Africa has vulnerable agroecosystems that threatens food security. A potential solution is intercropping with the indigenous shrub, Guiera senegalensis J.F. Gmel. Previous research of the Optimized Shrub‐intercropping System (OSS) (high density of ∼1,500 shrubs ha‐1 and coppiced residue incorporation) has been shown to dramatically improve pearl millet [Pennisetum glaucum (L.) R. Br.] yield, which is attributed to improved soil quality, nutrient and water availability, and harboring a distinct microbial community. Whether this response is consistent over a climate and soil type gradient in farmers’ fields has not been investigated. Therefore, the objective was to determine the impact of G. senegalenis on soil chemistry, enzyme activity, microbiomes, and metabolic pathways of millet root zone soils in farmers’ fields. The experiment was a three‐by‐two factorial with three rainfall and soil type sites along a north–south gradient in the Senegal Peanut Basin and two sampling locations (millet root zone soil within and outside the influence of the G. senegalensis). Guiera senegalensis shifted certain predicted bacterial metabolic pathways and enriched some bacterial and fungal genera. Notably, the increased crop growth due to G. senegalensis positively correlated with the abundance of genera having plant growth promoting properties (e.g., Enterobacter agglomerans and Paraburkholderia). Paucibacter, a genera that has deleterious and/or pathogenic properties, was highly abundant in non‐shrub soil but completely suppressed beneath the shrub. The results showed that G. senegalensis in farmers’ fields even at typical, low densities, where coppiced residues are annually burned, still increased soil chemical and microbial properties, suggesting that a more important factor than litter is the presence of shrub roots that provide root turnover and exudates, and water inputs through hydraulic lift.

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Intercropping with two native woody shrubs improves water status and development of interplanted groundnut and pearl millet in the Sahel

et al. 2018

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Soil microbial functional capacity and diversity in a millet-shrub intercropping system of semi-arid Senegal

Cited by 33 publications

References 38 publications

Temporal Microbial Response to Wetting-Drying Cycles in Soils within and Outside the Influence of a Shrub in the Sahel

Temporal Microbial Response to Wetting-Drying Cycles in Soils within and Outside the Influence of a Shrub in the Sahel

Microbial community shifts in pearl millet root zone soils with Guiera senegalensis intercropping along a rainfall and soil type gradient in the Sahel

Intercropping with two native woody shrubs improves water status and development of interplanted groundnut and pearl millet in the Sahel

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