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| Effect of different surface molecular membrane materials on inhibition of ammonia volatilization and the action pathways in paddy fields |
| Received:June 11, 2019 |
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| KeyWord:ammonia volatilization;paddy;molecular membrane;field water;gas-liquid interface |
| Author Name | Affiliation | E-mail | | WANG Meng-fan | College of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Agricultural Environment of the Lower Yangtze Plain, Ministry of Agriculture, Nanjing 210014, China | | | YU Ying-liang | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Agricultural Environment of the Lower Yangtze Plain, Ministry of Agriculture, Nanjing 210014, China | | | YANG-Bei | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Agricultural Environment of the Lower Yangtze Plain, Ministry of Agriculture, Nanjing 210014, China | | | XIE Fei | Jiangsu Academy of Forestry, Nanjing 211153, China | | | HOU Peng-fu | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Agricultural Environment of the Lower Yangtze Plain, Ministry of Agriculture, Nanjing 210014, China | | | YANG Lin-zhang | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Agricultural Environment of the Lower Yangtze Plain, Ministry of Agriculture, Nanjing 210014, China | | | XUE Li-hong | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Agricultural Environment of the Lower Yangtze Plain, Ministry of Agriculture, Nanjing 210014, China | njxuelihong@gmail.com | | SUN Qing-ye | College of Resources and Environmental Engineering, Anhui University, Hefei 230601, China | |
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| Abstract: |
| The inhibition of ammonia volatilization in paddy fields has great significance of improving nitrogen use efficiency, reducing environment pollution and protecting human health. Surface molecular film is an economic and environmental protection means to inhibit ammonia volatilization in paddy fields, but the selection and action of suitable membrane materials are not clear. Therefore,Polylactic acid (PLA), Zein and Span60 were selected as surface molecular film materials according to their solubility and film formation state. The addition ratios of PLA was 2, 4, 6, and 8 g·m-2 (based on dry matter,same as below), Zein was 1, 2, 4, 8 g·m-2 and Span 60 was 1, 2, 4, 6 g·m-2. The experiment was carried out in greenhouse to compare their control effects of ammonia volatilization and the main action pathways. The results showed that PLA, Zein and Span60 could reduce ammonia volatilization in the liquid-gas interface by 6.61%~18.10%, 6.71%~21.78%, 4.32%~9.51%, respectively. The amount of nitrogen loss from ammonia volatilization also decreased significantly during one week after the fertilization. PLA and Zein inhibited ammonia volatilization by reducing the concentrations of ammonium nitrogen and values of pH in the surface water. Zein with 2 g·m-2 and PLA with 8 g·m-2 showed better inhibiting effect on ammonia volatilization. Span60 mainly reduce the ammonia volatilization by reducing the ammonium nitrogen concentration in the field water, but the excessive addition ratio increased the ammonium nitrogen concentration, and the best addition ratio was 1 g·m-2, which reduced the ammonia emission by 5.63%. Therefore, this study indicated that Zein with 2 g·m-2 additional ratio was a suitable molecular surface inhibition material for ammonia volatilization. Further study will be needed in the paddy field. |
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