Decontamination of chlorate in longan plantation soils by bio-stimulation with sugar amendment

Suppression of chlorate degradation in longan plantation soil after multiple applications of chlorate and accelerated degradation by sugar amendment

“…Based on this information, together with our previous results (Sutigoolabud et al 2004), a practical method of decontamination of residual chlorate in Iongan plantation field soil could be developed.…”

“…As discussed in our previous paper (Sutigoolabud et al 2004), glucose and sucrose might act as energy substrates or electron donors for chlorate-reducing microorganisms (van Ginkel et al 1995;Wallace et al 1996;Bruce et al 1999) in soil, while chlorate as electron acceptor. It is possible that due to such biochemical functions of glucose and sucrose, their addition might increase the number and I or activity of the chloratereducing microorganisms in the damaged soil, and lead to the rapid degradation of chlorate in soil.…”

“…In our previous paper (Sutigoolabud et al 2004), we reported that soil amendment with glucose or sucrose at the concentration of 10 g carbon kg-1 soil remarkably enhanced chlorate decomposition in soil. In Expts.…”

“…We also reported in our previous paper (Sutigoolabud et al 2004) that glucose or sucrose amendment of soil remarkably accelerated chlorate decomposition in soil. In the second half series of the experiments, we determined whether this treatment was effective for the accelerated decomposition of chlorate in soil even after the suppression of decomposition caused by repeated application of chlorate.…”

“…In our previous paper (Sutigoolabud et al 2004), we examined in the laboratory the persistence of chlorate in soils collected from several Iongan plantation fields in Northern Thailand. The results indicated that chlorate disappeared in soil because of microbial reduction to chloride ion, and that under upland soil conditions, chlorate decomposition was relatively fast when added at the concentration of 34 mg 1 soil, while very slow when added at the concentration of 341 mg kg-1 soil.…”