| Title | Soil macrofaunal activity, microbial catabolic limitations and nutrient cycling in cropping systems amended with woody residues and nitrogen inputs |
| Publication Type | Journal Article |
| Year of Publication | 2020 |
| Authors | Guebre D., Traore S., Hien E., Some D., Bationo B.A, Wiesmeier M. |
| Journal | Pedobiologia |
| Volume | 83 |
| Pagination | 10 |
| Date Published | Nov |
| Type of Article | Article |
| ISBN Number | 0031-4056 |
| Accession Number | WOS:000591875500008 |
| Keywords | Agriculture, agroecology, amendments, availability, Biogenic structures, burkina-faso, C/N ratio, carbon, decomposition, Environmental Sciences & Ecology, n, nitrogen availability, Organic carbon, organic-matter, respiration, Soil respiration, south-sudanese zone, subtropical forest, use efficiency |
| Abstract | Agroecological practices are emerging as efficient alternatives to address the challenge of sustainable agriculture. The objective of this study was to examine whether plant residue amendments from stems and leaves (SL) of an agroforestry shrub (Piliostigma reticulatum) enriched with nitrogen (N) sources improve nutrient cycling in Soudano-Sahelian cropping systems. The experimental design was organized into four replicates with six treatments consisting of two treatments of SL residue amendments (amended and non-amended) in combination with three treatments including additional N sources (natural soils, urea, and cowpea as intercrop). The results showed that the activity of termites (Nasutitermes torquatus) and ants (Messor galla and Pachycondyla rufipes) was 12-13 and 2-3 times higher in the SL amended soils than in non-amended soils, respectively. The activity of earthworms (Millsonia inermis) was highest in the SL amended soils associated with the cowpea intercrop, and was significantly lower in the urea enriched soils. SL amendments and N enrichments had no effect on soil basal respiration. The substrate-induced respiration with N substrates (L-alanine and L-arginineL) was 25 and 52 % higher in the SL amended soils than in the natural soils without any N inputs, indicating N limitation of microbial activity. This corroborates the higher C/N ratio (14.3) observed in the SL amended soils compared to the natural soils without any inputs (10.3). The N enrichment decreased the C/N ratio of the SL amended soils but was not efficient to alleviate microbial catabolic limitations, likely by switching from N to C limitation. Overall, the SL amendments with or without N enrichments triggered temporarily the soil macrofaunal activity, increased the NH4-N availability compared to that of NO3-N, and improved crop performance.
|
| Short Title | PedobiologiaPedobiologia |
| Alternate Journal | Pedobiologia |
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Guebre, Daouda Traore, Salifou Hien, Edmond Some, Der Bationo, Babou Andre Wiesmeier, Martin
Wiesmeier, Martin/N-3066-2014
Wiesmeier, Martin/0000-0003-3981-5461
Ministry of Higher Education and Scientific Research (Burkina Faso); CGIAR Research Program on Grain Legumes and Dryland Cereals (GLDC)CGIAR; CORAF-WECARD program on Improving Resilience to Climate Change in Agricultural Ecosystems
We thank the reviewers for their helpful comments on the previous version of this paper. We are grateful to the Ministry of Higher Education and Scientific Research (Burkina Faso) for granting a thesis scholarship to the first author, the CGIAR Research Program on Grain Legumes and Dryland Cereals (GLDC), and the CORAF-WECARD program on Improving Resilience to Climate Change in Agricultural Ecosystems for supporting the field experiment. We thank also Dr Mamoudou Traor ' e (INERA/CNRST) for the macrofaunal species determination, M. Prosper Sadar ' e Sawadogo (IRD-Ouagadougou) for the fieldwork assistance.
6
Elsevier gmbh
Munich
1873-1511
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