Effet des pesticides sur l'activité microbienne d'un sol ferrugineux tropical du Burkina Faso.

B. Ouattara, Ow Savadogo, O. Traoré, B. Koulibali, M. P. Sedogo, A. Traoré
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引用次数: 6

Abstract

L’effet des pesticides utilises en culture cotonniere sur l’activite microbienne globale des sols a ete etudie sur un sol ferrugineux tropical en zone ouest du Burkina Faso. Des echantillons de sol ont ete preleves a 30, 73, et 119 jours apres semis du cotonnier. Les analyses de respirometrie, de determination de la biomasse microbienne et de l’ammonification ont ete realisees. Les resultats indiquent que les doses de pesticides apportees sont insuffisantes pour affecter les bacteries ammonifiantes. En revanche, ces doses perturbent la vie du sol en affectant l’efficience des microorganismes a utiliser la matiere organique, en activant tantot la respiration et la biomasse microbiennes et tantot en les inhibant. Mots Cles : Pesticide – Sol – Activite Respiratoire – Biomasse Microbienne – Bacterie Ammonifiante The effect of pesticides used in cotton cultivation on soil global microbial activity was studied on a tropical ferruginous soil in the west zone of Burkina Faso. The soil samples were took at 30, 73 and 119 days after the cotton seeds. The analyses of respirometry, of microbial biomas  determination and of the ammonification were realized. The results indicate that the doses of pesticides that put aren’t enough to affect ammonificate bacteriums. In return, these doses disrupt soil life by affecting microorganism’s efficiency in using organic matter, by stimulating sometimes microbial’s respiration and biomas, and sometimes inhibiting it. Key words: Pesticide – Soil – Respiratory activity – Microbial biomas – Ammonificate bacterium
农药对布基纳法索热带铁质土壤微生物活性的影响。
在布基纳法索西部的热带铁质土壤中,研究了棉花种植中使用的农药对土壤整体微生物活性的影响。分别在棉花播种后30、73和119天采集土壤样品。进行了呼吸测定、微生物生物量测定和氨化分析。结果表明,施用的农药剂量不足以影响氨化细菌。另一方面,这些剂量通过影响微生物利用有机物质的效率,激活和抑制微生物的呼吸和生物量,扰乱了土壤的生命。关键词:农药-土壤-呼吸活性-微生物生物量-氨化细菌布基纳法索西部热带铁质土壤研究了棉花种植中使用的农药对土壤整体微生物活性的影响。= =地理= =根据美国人口普查,该县的总面积为,其中土地和(3.064平方公里)水。= =地理= =根据美国人口普查,该地区的总面积为,其中土地和(2.641平方公里)水。结果表明,施用的农药剂量不足以影响氨化细菌。反过来,这些剂量通过影响微生物利用有机物质的效率,有时刺激微生物的呼吸和生物群落,有时抑制它,从而破坏土壤生命。关键词:农药-土壤-呼吸活性-微生物生物群落-氨化细菌
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