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| Over-fertilization and consecutive monoculture in facility vegetable cultivation lead to soil deterioration, which seriously affect the sustainable development of vegetable industry. In this study, rice straw and its biochar (BC, rice straw pyrolysed at 450℃) were used as remediation materials to investigate the dynamics of dissolved organic carbon (DOC) and nitrogen and some soil properties during remediation of facility vegetable field using reductive soil disinfestation (RSD) technique. The results showed that the soil DOC, pH, total carbon (TC) and C/N ratio with RSD treatments was significantly higher than that of untreated soil (CK), but soil nitrate content (NO3-) and the electrical conductivity (EC) was significantly lower than that in the CK treatment after 21 days incubation (P<0.05), and soil NO3- content was effectively eliminated within 3 days. The application of BC in RSD remediation significantly increased soil pH, EC, TC and C/N ratio (P<0.05), but it had no significant effect on the content of soil NH4+ and NO3-. |
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| Keywords:soil science; RSD; BC; rice straw; facility vegetable soil; remediation |
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