Soil bacterial biomass and diversity are affected by different furrow-ridge mulched management systems during potato continuous cropping

Abstract

12The soil bacterial composition is vital for sustainable agriculture due to its 13 importance in biogeochemical processes in the soil environment. Multiple 14 management systems, such as different furrow-ridge mulched cropping systems, have 15 been established to reduce the damage caused by continuous cropping of potato 16 (Solanum tuberosum L.). However, little is known about the responses of soil 17 bacterial biomass and diversity to these systems. In this study, six different 18 ridge-furrow film planting patterns were tested in a 2-year continuous cropping potato 19 field: flat plot without mulch (CK), flat plot with mulch (T1), on-ridge planting with 20 full mulch (T2), on-furrow planting with full mulch (T3), on-ridge planting with half 21 mulch (T4), and on-furrow planting with half mulch (T5). The soil physicochemical 22 properties and bacterial composition were significantly affected by the planting 23 pattern. Mulched soils, especially T2, maintained better soil physicochemical 24 properties than controls. Fully mulched soil maintained higher bacterial biomass and 25 diversity. Among the dominant genera, the abundances of Nitrosomonadaceae in T2 26 and T4 were higher than those in the other treatments. Consequently, compared with 27 the other treatments, on-ridge with mulching patterns resulted in better soil 28 physicochemical properties and high bacterial biomass and diversity, which could 29 reduce the economic losses due to potato production by continuous cropping.30

The potato rhizosphere microbiota correlated to the yield of three different regions in Korea

“…Other studies have compared potato microbiomes under different agricultural amendments, including biocontrol strategies 13 , 14 . The results of these potato microbiome studies show consistency with those reported for other crops with niche 11 , 12 , 14 , 15 , region 9 , 16 , and agricultural management 10 , 13 having significant effect on bulk soil, rhizosphere soil, and tuber microbiome profiles.…”

“…Although the clusters defined at the class or phylum level are difficult to identify some functions related to plant health can be inferred. Many bacterial taxa belonging to Vicinamibacterales have been implicated as plant growth promoting bacteria involved in the nitrogen cycle 10 , 31 . Species belonging to Burkholderiales have been reported as plant growth promoting bacteria related to phosphorous cycle 32 .…”