Relationships between adsorption mechanism of allelochemicals and change of soil microorganism flora by application of activated carbon for avoidance technology of replant problem

本研究的目的是评价不同土壤在芦笋栽培条件下的化感作用活性，同时重点研究同一品种连作对土壤的伤害表现。此外，本研究还阐明了活性碳的吸附持续时间，它可以很容易地吸收土壤中存在的化感物质，同时与土壤微生物区系的变化有关。因此，使用活性碳化感作用的效果和程度因土壤性质不同而不同。当施用量成为土壤微生物相增加的附带条件时，随着土壤微生物的活动，吸附在活性碳上的化感物质发生解吸作用，从而维持了活性碳吸附时间的影响。

The purpose of the study was to evaluate the soil-allelopathic activity in different soils under asparagus cultivation, while focusing on expression of injury by continuous cropping with the same cultivar. Moreover, this study was elucidated adsorption duration of activated carbon, which can easily absorb allelochemicals present in the soil, while associated with changes in the soil microflora. As a result, the effect of and degree of soil-allelopathic activity by application of activated carbon differs depending on the soil properties. When the application became collateral for the increase in soil microorganisms phase, the effect of adsorption duration of activated carbon would be sustained by desorption action of allelochemicals adsorbed to the activated carbon with the activity of soil microorganisms.