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| Phytoavailability comparison of Cu and Zn in two types of leaf vegetables after application with manure and their equivalent water-soluble salts |
| Received:July 30, 2017 Revised:October 16, 2017 |
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| KeyWord:pig manure;heavy metals;water spinach;pakchoi;phytoavailability |
| Author Name | Affiliation | E-mail | | YAN Meng-meng | School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Ministry of Agriculture Key Laboratory of Agro-Environment, Beijing 100081, China | | | JIA Wu-xia | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Ministry of Agriculture Key Laboratory of Agro-Environment, Beijing 100081, China | | | SU Shi-ming | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Ministry of Agriculture Key Laboratory of Agro-Environment, Beijing 100081, China | | | WANG Ya-nan | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Ministry of Agriculture Key Laboratory of Agro-Environment, Beijing 100081, China | | | WANG Ji | School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China | | | ZENG Xi-bai | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Ministry of Agriculture Key Laboratory of Agro-Environment, Beijing 100081, China | | | BAI Ling-yu | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Ministry of Agriculture Key Laboratory of Agro-Environment, Beijing 100081, China | bailingyu@caas.cn |
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| Abstract: |
| Pot experiments with aquic brown soil, red soil, and irrigated desert soil as experimental soils were conducted. The phytoavailabilities of Cu and Zn in pig manure for water spinach(Ipomoea aquatica) and pakchoi(Brassica chinesis) were determined and subsequently compared with their equivalents in water-soluble salts. As the pig manure application reached 50 g·kg-1, the contents of Cu and Zn in water spinach shoots were lower than those of the treatment with their equivalent water-soluble salts. The phytoavailability coefficients in aquic brown soil, red soil, and irrigated desert soil were 48.95%, 89.77%, 67.81% respectively, for pig manure Cu and 22.40%, 10.1%, 54.24%, respectively, for Zn. The phytoavailability coefficients of pig manure Cu and Zn for pakchoi were significantly improved compared with those for water spinach, which were 91.38%, 135.97%, and 128.32%, respectively, for Cu and 59.06%, 15.23%, and 99.94%, respectively, for Zn. As the pig manure application reached 100 g·kg-1, the contents of Cu in water spinach and pakchoi shoots were higher than those of the equivalent water-soluble Cu salts. The phytoavailability coefficients of Cu in pig manure were higher than 100%, while those of Zn were less than 100%, except in aquic brown soil. The phytoavailability coefficients of Cu and Zn increased with application dose and time. Furthermore, the phytoavailability coefficients of Cu or Zn were different among the three experimental soils. Cu phytoavailability coefficients were in the order of red soil, irrigated desert soil, and aquic brown soil from high to low, and those for Zn in the order of aquic brown soil, irrigated desert soil, and red soil from high to low. The results indicated that the application of pig manure significantly increased the contents of Cu and Zn in water spinach and pakchoi shoots compared with the control. |
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