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| Study of composites of three kinds of environmental materials on the synergism of soil moisture conservation and nitrogen-phosphorus fertilizer efficiency |
| Received:April 14, 2017 |
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| KeyWord:super absorbent polymer;humic acid;zeolite;moisture conservation;nitrogen-phosphorus fertilizer synergism |
| Author Name | Affiliation | E-mail | | MA Yan | School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China | | | LIU Zhen-hai | School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China | | | LIU Lu-han | School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China
Beijing Capital Environmental Investment Limited, Beijing 100083, China | | | SHI Yan-jun | School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China | | | HUANG Zhan-bin | School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China | zbhuang2003@163.com |
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| Abstract: |
| This study aimed to determine the simultaneous effects of soil water and nitrogen-phosphorus fertilizers based on the functional complementarity of different environmental materials. Super absorbent polymer (A), humic acid (B), and zeolite (C) were selected, and soil column leaching was performed to identify the main and secondary targets and combination optimization of composites of three different environmental materials on soil moisture and nitrogen-phosphorus fertilizer. Eventually, the optimal combination of soil moisture and nitrogen-phosphorus conservation synergism was obtained, and the effective mechanism of different environmental materials on soil moisture and fertilizer conservation was analyzed using the process analysis. The results showed that composites of three kinds of environmental materials had significant effects on soil moisture and nitrogen-phosphorus fertilizers, and the optimal combination of soil moisture conservation and nitrogen-phosphorus fertilizer efficiency was A3B3C2 (with super absorbent polymer, humid acid and zeolite of 1.5, 1.5 g·kg-1 and 9.0 g·kg-1, respectively). Compared with those of CK, the water leaching was reduced by 3.5%, the leaching rate of nitrogen was decreased by 12.1%, and the leaching amount of phosphorus was increased by 65.5% in A3B3C2. Comparative analysis revealed that zeolites had the maximum influence on the pH and EC values, whereas humic acid had the minimum effect. The addition of environmental materials could increase soil porosity, improve soil aggregate structure, and help improve soil properties. The results provide an important basis for new fertilizer research and development. |
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