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Effects of soil amendments on assemblages of soil mites (Acari: Oribatida, Mesostigmata) in short-rotation willow plantings in central New York

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Abstract:

We investigated the effects of several soil amendment materials, potentially useful for willow biomass crops, on the abundance, diversity, and community structure of free-living soil mites (Acari: Oribatida, Mesostigmata) in a 4-year replicated field experiment. Soil treatments included biosolids (lime-stabilized sewage sludge), chicken manure compost, urea fertilizer, black plastic mulch, and control. The predaceous Mesostigmata (40 spp.) responded differently to soil amendment treatments than did saprophagous and mycophagous Oribatida (28 spp.). The urea fertilizer had no persistent effect on mite assemblages. Plastic mulch did not affect Mesostigmata, but had a lasting detrimental effect on oribatid mites. Mesostigmatid mites benefited from application of biosolids, while Oribatida were most adversely affected by this treatment. When plastic mulch and biosolids were used together, the effect of biosolids predominated. Composted chicken manure supported abundant and diverse populations of both groups.

Nous avons étudié, avec un dispositif au champ répété sur 4 ans, les effets de différents matériaux servant à amender les sols et potentiellement utiles pour la production de biomasse de saule sur l'abondance, la diversité et la structure des communautés d'acariens du sol (Acari : Oribatida, Mesostigmata). Les traitements du sol incluaient des biosolides (boues d'épuration stabilisées à la chaux), un compost de fumier de poulet, un fertilisant à base d'urée, un paillis de plastique noir et un témoin. Les mésostigmates prédateurs (40 espèces) ont réagi différemment aux amendements du sol comparativement aux oribatides saprophages et mycophages (28 espèces). Le fertilisant à base d'urée n'a pas eu d'effet persistant sur les assemblages d'acariens. Le paillis de plastique n'a pas affecté les mésostigmates, mais a eu un effet néfaste persistant sur les acariens oribatides. Les acariens mésostigmates ont bénéficié de l'application des biosolides tandis que les oribatides ont été très sévèrement affectés par ce traitement. Quand le paillis de plastique et les biosolides étaient utilisés ensemble, l'effet des biosolides prédominait. Le compost de fumier de poulet supportait des populations abondantes et diversifiées des deux groupes d'acariens. [Traduit par la Rédaction]

Document Type: Research Article

Publication date: July 1, 2004

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  • Published since 1971, this monthly journal features articles, reviews, notes and commentaries on all aspects of forest science, including biometrics and mensuration, conservation, disturbance, ecology, economics, entomology, fire, genetics, management, operations, pathology, physiology, policy, remote sensing, social science, soil, silviculture, wildlife and wood science, contributed by internationally respected scientists. It also publishes special issues dedicated to a topic of current interest.
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