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JZ
Junlian Zhang
Author with expertise in Soil Carbon Dynamics and Nutrient Cycling in Ecosystems
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Soil bacterial biomass and diversity are affected by different furrow-ridge mulched management systems during potato continuous cropping

Weina Zhang et al.Aug 17, 2018
The soil bacterial composition is vital for sustainable agriculture due to its importance in biogeochemical processes in the soil environment. Multiple management systems, such as different furrow-ridge mulched cropping systems, have been established to reduce the damage caused by continuous cropping of potato (Solanum tuberosum L.). However, little is known about the responses of soil bacterial biomass and diversity to these systems. In this study, six different ridge-furrow film planting patterns were tested in a 2-year continuous cropping potato field: flat plot without mulch (CK), flat plot with mulch (T1), on-ridge planting with full mulch (T2), on-furrow planting with full mulch (T3), on-ridge planting with half mulch (T4), and on-furrow planting with half mulch (T5). The soil physicochemical properties and bacterial composition were significantly affected by the planting pattern. Mulched soils, especially T2, maintained better soil physicochemical properties than controls. Fully mulched soil maintained higher bacterial biomass and diversity. Among the dominant genera, the abundances of Nitrosomonadaceae in T2 and T4 were higher than those in the other treatments. Consequently, compared with the other treatments, on-ridge with mulching patterns resulted in better soil physicochemical properties and high bacterial biomass and diversity, which could reduce the economic losses due to potato production by continuous cropping.