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Agricultural Soil Fertilizing Potential of Dry Faecal Sludge from Treatment Plants in Burkina Faso

Open Journal of Soil Science 2022年第6期12卷 225-241页

作者： Sabiriba Alain Hema Mamadou Traore Kalifa Coulibaly bazoumana koulibaly Hassan Bismarck Nacro Nazi BONI University Laboratory of Study and Research on Soil Fertility Bobo Dioulasso Burkina Faso Institute of Environment and Agricultural Research (INERA) Cotton Program Bobo Dioulasso Burkina Faso

The dry faecal sludge (DFS) are potential sources of organic fertilizers because of their high content in nutrients and organic matter, critical for plants growth and soil health maintaining. In Burkina Faso, the DFS are processed in faecal treatment plants. However, after drying, the DFS are most often dumped in the nature without any control or directly used as fertilizer without any idea of their potential risks for human health and the environment. This investigation aimed at physico-chemical and toxicological characterization of the DFS from faecal treatment plants according to the duration of their storage. For this purpose, DFS samples were collected in three (3) faecal treatment plants in Ouagadougou and one in Bobo Dioulasso, in Burkina Faso. The measurements were carried out on pH (H2O), organic matter content, major nutrients (N, P, K), trace elements (Na, Ca and Mg) and metallic trace elements. Indifferently to the faecal treatment plants and the duration of the storage, the DFS showed strong acidity (4.85 ± 0.13 et 6.53 ± 0.10) and low content in total elements (Na à40.97% ± 9.99%). Values recorded of the trace metallic elements showed there were no risk of contamination when used as fertilizers: (103.9 ± 2.00 mg/kg < Cu < 137 ± 25.69 mg/kg);(710.13 ± 18.97 mg/kg < Zn < 922.30 ± 7.04 mg/kg);(33.03 ± 1.65 mg/kg < Pb < 152.40 ± 19.40 mg/kg);(1.34 ± 0.17 mg/kg < Cd < 1.76 ± 0.04 mg/kg);(34.34 ± 0.27 mg/kg < Ni < 52.32 ± 3.60 mg/kg) et (771.15 ± 18.36 mg/kg < Cr < 1697.83 ± 55.11 mg/kg). The results indicated a high fertilizer potential of the DFS after addressing the issue of their acidity.

关键词： Toxicity Agronomic Potential Dry Faecal Sludge Burkina Faso

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Soil Carbon Stocks Evolution in Organic Cotton-Based Cropping Systems in Southern and Northern Sudanese Agro-Ecological Zones of Burkina Faso

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Journal of Agricultural Science and Technology(B) 2019年第6期9卷 392-402页

作者： Mamadou Traoré bazoumana koulibaly Kalifa Coulibaly Issouf Traoré Moussa Gnissien Tahibou Paré Hassan Bismarck Nacro Institut du Développement Rural(IDR) Laboratoire d´Etude et de Recherche sur la Fertilitédes sols(LERF)UniversitéNazi Boni de Bobo Dioulasso(UNB)01 BP1091 Bobo-Dioulasso 01Burkina Faso Institut de l’Environnement et de Recherches Agricoles(INERA) Programme Coton Burkina Faso.01 BP 208 Bobo Dioulasso 01 Bureau National des Sols(BUNASOLS) 03 BP 7005Secteur 27 OuagadougouBurkina Faso

Variation of soil carbon stock in the cropping systems is an important indicator of their *** present study was conducted in 2015 and 2018 in seven organic cotton production areas distributed over the Southern and Northern Sudan agro-ecological zones in Burkina *** samples were collected in 2015 as baseline and in 2018,after three years of cropping seasons,to determine the variations in carbon stocks in plots under organic farming *** were also conducted to understand the fertilization practices implemented by producers during the same *** results revealed that the recommended fertilization packages were not respected due to low production capacity and under using of organic *** three years of cropping in 2018,the deficit of organic restitution has led to a high decline of the soil carbon *** decline was more severe in the 0-10 cm depth in some soils where the decrease in carbon stocks ranged from-4.6 t/ha to-5.5 t/*** correlation between soil types and their carbon stocks in the 0-10 cm soil layer was found to be significant(p<0.05)in the Northern Sudan agro-ecological zone with adjusted R2=74%and 54%in 2015 and 2018,respectively,and adjusted R2=56%(2015)and 44%(2018)in the Southern Sudan agro-ecological *** three years of organic cotton-based farming,a decrease in the correlation between soil types and their carbon content was observed in the majority of *** results show that the process of carbon storage in soil is more influenced by agricultural practices and agro-ecological conditions than by the soil type.

关键词： Organic cotton soil carbon stocks cropping system Burkina Faso

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Effects of Direct Sowing under Mulch-Based Cropping System (DMC) on Cotton and Maize Yield and Chemical Characteristics of Ferruginous Soil (Lixisoil) in the South Sudan Area of Burkina Faso

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Open Journal of Soil Science 2021年第6期11卷 352-365页

作者： Adama Ouattara bazoumana koulibaly Déhou Dakuo Kalifa Coulibaly Pascal Bazongo Oula Traore Hassan Bismarck Nacro Institute of Environment and Agricultural Research (INERA) Bobo-Dioulasso Burkina Faso Laboratory for Soil Fertility Studies and Research Nazi BONI University Bobo-Dioulasso Burkina Faso University of Fada N’Gourma Fada N’Gourma Burkina Faso West African Monetary Economic Union (UEMOA) Ouagadougou Burkina Faso

To better understand the effects of direct sowing under mulch-based cropping system (DMC) in Burkina Faso’s cotton production systems, randomized blocks of Fisher experimental design were implemented at Farako-Ba research station from 2010 to 2019. The study was conducted on lixisoil to evaluate DMC effects on biomass production, crops yields and soil chemical properties in a maize and cotton rotation system associated with cover crop. Conventional tillage and direct seeding without cover crop were compared to DMC under B. ruziziensis (GERM. & EVRARD), DMC under B. ruziziensis + M. cochinchinensis mulch and DMC under C. juncea (L.) mulch used in association with maize. Biomass production, crop yields and soil chemistry were evaluated. Results showed that over 10 years, no-till with or without a cover crop provided cotton seed and maize yields that were statistically equivalent to the tillage commonly practiced by farmers. Cover crop has allowed increasing the biomass production compared to Conventional Tillage and Direct Seeding. Maize yield has not varied significantly with the cover crop. After 10 years of maize and cotton rotation, the improvement raised from +27% to +38% for organic matter and from +15% to +29% for nitrogen with DMC including legumes such as M. cochinchinensis and C. juncea compared to Conventional Tillage on 0 - 5 cm depth. No significant differences were found on soil pH like P2O5 and K2O content. Although DMC with C. juncea used as cover crop did not provide the best biomass production, it contributes to increase nitrogen and organic matter and presents better mineral balances in 10 years of rotation. The 5 - 10 cm and 10 - 20 cm were little influenced by DMC systems.

关键词： Cover Crop Tillage Direct Sowing under Mulch-Based Cropping System Crop Rotations Soil Characteristic Leguminous

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