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| Reclamation of Secondary Salinized Soils in Protected Vegetable Fields Using Different Wastes |
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| KeyWord:wastes; protected agriculture; secondary salinization; soil reclamation |
| Author Name | Affiliation | | QIAN Xiao-yong | Shanghai Academy of Environmental Sciences, Shanghai 200233, China | | SHEN Gen-xiang | Shanghai Academy of Environmental Sciences, Shanghai 200233, China | | GUO Chun-xia | Shanghai Academy of Environmental Sciences, Shanghai 200233, China | | WANG Ling-ling | Shanghai Qingpu Modern Agriculture Park Development Co. Ltd., Shanghai 201717, China | | LI Jia-kui | Shanghai Qingpu Modern Agriculture Park Development Co. Ltd., Shanghai 201717, China |
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| Abstract: |
| Soil secondary salinization has restricted sustainable production of vegetables in protected fields. In pot experiment, effects of five wastes on control of soil secondary salinization in protected vegetable fields were compared. Applications of all five wastes reduced the soil salinity to some extent. The reduction rates of soil salinity were 0.2%~24.7%, 5.8%~38.5%, 5.7%~18.0%, -2.9%~19.1% and 5.8%~19.1% for animal manure, rice straw, chitosan, furfural residue and bamboo charcoal, respectively. Waste additions changed major ions in soils. In comparison with the control, applying animal manure increased K+, Na+, Ca2+ and Cl- contents, whereas rice straw, chitosan and bamboo charcoal decreased the contents of K+, Na+, Ca2+, Mg2+, Cl-, SO2-4 and NO-3. However, furfural residue application increased K+, Na+, Ca2+, Cl- and SO2-4 but reduced Mg2+ and NO-3 contents. Vegetable biomass was enhanced by applying all five wastes, with percentages being 128.6%~395.4%, 63.7%~82.5%, -57.1%~208.9%, 64.6%~118.3% and -3.7%~2.9% for animal manure, rice straw, chitosan, furfural residue and bamboo charcoal, respectively. Our results show that animal manure and rice straw have better performance than other wastes in terms of reclamation effects and economic costs. |
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