title: Effect of a residue after evaporation from industrial vitamin C fermentation on chemical and microbial properties of alkali-saline soil.
abstract: Residue after evaporation (RAE) from industrial vitamin C fermentation is emitted as a waste product at an amount of 60,000 tons per year in China. The disposal of RAE is difficult because of its high chemical oxygen demand (1.17×10(6) mg/l) and low pH (0.27). We hypothesized that RAE could be used as an ameliorant for alkali-saline soils, and tried to verify it by carrying out a pot experiment of pakchoi cultivation and to explore its effect on soil chemical and microbial properties. The results showed that pakchoi yield was increased by 28.13% and pakchoi quality was also enhanced under RAE treatment. The improved chemical and microbial properties of treated soil were also observed: soil pH was decreased from 9.19 to 9.03; total organic carbon, available phosphorus and available potassium were increased by 49.15%, 34.91% and 42.02%, respectively; number of culturable bacteria, actinomycetes and fungi, microbial biomass carbon and enzyme activity number were improved by 52.97%, 104.05%, 79.09%, 57.82% and 31.16%, respectively. These results suggested the residue application led to an improved soil quality and subsequently a higher yield and quality of pakchoi. This study provided a strong evidence for the feasibility of RAE as an ameliorant for alkali-saline soil.
authors.affiliation: 1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China / University of Chinese Academy of Sciences, Beijing, China / College of Sciences, Liaoning Technical University, Fuxin, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Kong
authors.affiliation: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Xu
authors.affiliation: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China / University of Chinese Academy of Sciences, Beijing, China.
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China / University of Chinese Academy of Sciences, Beijing, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Sun
authors.affiliation: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China.
authors.forename: Lihua
authors.initials: L
authors.lastname: Wang
mesh_terms: D000468:Alkalies; D001205:Ascorbic Acid / Q000378:metabolism*; D005285:Fermentation; D007220:Industrial Waste; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology; D014835:Volatilization
chemical_list: D000468:Alkalies; D007220:Industrial Waste; D012987:Soil; D001205:Ascorbic Acid