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| Effects of different fertilization and measurement methods on ammonia volatilization of summer maize in purple soil |
| Received:December 22, 2015 |
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| KeyWord:ammonia volatilization;N fertilization method;measurement method;purple soil;summer maize;ammonia mitigation |
| Author Name | Affiliation | E-mail | | ZHANG Chong | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | LI Xue-qian | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | SU Fang | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | | | ZHU Bo | Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China | | | JU Xiao-tang | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China | juxt@cau.edu.cn |
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| Abstract: |
| Soil properties, local climatic conditions and fertilization method in purple soil regions may significantly affect ammonia volatilization(AV). In this study, the effects of different fertilization methods on AV from purple soil were investigated during summer maize growth in middle Sichuan Province. Two different AV measurement methods(i.e., wind tunnel method and continuous airflow enclosure method) were compared to better quantify ammonia emissions from croplands. Five fertilization methods with three replicates were used in the experiment included CK(no nitrogen fertilizer), BC(broadcast urea, which is the local conventional practice), BC+Limus [broadcast urea amended with urease inhibitor Limus(a new urease inhibitor developed by BASF)], Band1(band urea once), Band2(band urea twice). The AV in all the treatments was determined by enclosure method. For BC treatments, AV was monitored by a wind tunnel system simultaneously. Results showed that AV loss rates were greater than 40% in BC, but only 4.8%, 3.8% and 1.3% in BC+Limus, Band1 and Band2, respectively, a reduction of 90%, 92%, and 97% as compared with BC. Ammonia loss rate(48.4%) measured by continuous airflow enclosure method was slightly higher than that by wind tunnel method(41.9%), but no significant difference between them was found. |
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