Soil micro-arthropod communities and microbial parameters in the potato ridge under two field management systems on sandy loams in Atlantic Canada

Abstract

Intensive forms of soil management occur in potato (Solanum tuberosum L.) production systems, but little is known about the influence of such practices on soil biological properties. Microbial biomass C, phosphatase activity, and the abundance (number), richness (family groups), and diversity of soil micro-arthropods (Collembola and mites) were compared in conventional and adjacent integrated pest management (IPM) systems of 3-yr potato rotations, established on fine sandy loams in Prince Edward Island, Atlantic Canada. The study was conducted at two sites over a 2-yr period. Soil microbial parameters were generally similar between management systems. Management differences showed some effect on micro-arthropod abundance and richness in three of the eight comparisons. Under optimum soil-water conditions, both Collembola and mite communities increased over the growing season regardless of management system. Key words: Soil management for potato, Collembola, mites, soil microbial biomass carbon, acid phosphatase, integrated pest management