Effects of Morchella spp.Cultivation in Paddy and Dry Land on Soil Microorganisms and Element Contents
In this study,the changes in the quantity of culturable functional microorganisms and element contents in soil at dif-ferent stages of Morchella sp.cultivation in paddy and dry land were compared.The results showed that,under the paddy land mode,nitrogen-fixing bacteria decreased during the harvest period,while ammonifying bacteria and cellulose-decomposing bac-teria increased during the frost-like mycelial growth period and harvest period.Under the dry land mode,most functional mi-croorganisms had higher numbers during the frost-like mycelial growth period than during the spawning and harvest periods,but the numbers of nitrogen-fixing bacteria,potassium bacteria and others significantly decreased during the harvest period.Under the two modes,the contents of Mg and Zn significantly decreased.The Cu content significantly increased after the harvest under the dry land mode,and the S element had a close relationship with soil microorganisms,the correlation coefficients between Mg,Zn and microorganisms were relatively high.In the paddy land mode,the Zn element had the closest relationship with soil microorganisms.To address continuous cropping obstacles,purposefully supplementing significantly reduced elements to improve soil physicochemical properties and restore soil microbial population structure,which may be an effective strategy to mitigate or eliminate continuous cropping obstacles.
Morchella sextelatacontinuous cropping obstaclesoil functional microorganismsoil mineral element
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