| Content Provider |
World Health Organization (WHO)-Global Index Medicus |
| Author |
Zheng, Xunhua Wu, Xian Shaaban, Muhammad Tang, Shuirong Khan, Imran Hu, Ronggui He, Dongdong Zhao, Jingsong Wu, Lei Horwath, William R. Wang, Milan |
| Description |
Country affiliation: China Author Affiliation: Wu L ( College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.); Tang S ( College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.); He D ( College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.); Wu X ( College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.); Shaaban M ( College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.); Wang M ( College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.); Zhao J ( College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.); Khan I ( College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.); Zheng X ( State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China); Hu R ( College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China. Electronic address: rghu@mail.hzau.edu.cn.); Horwath WR ( Department of Land, Air and Water Resources, University of California, Davis, 1 Shields Avenue, Davis, CA 95616, USA.) |
| Abstract |
The conversion from rice to vegetable production widely occurs in China. However, the effects of this conversion on N O emission and the underlying mechanisms are not well understood. In the present study, 12 rice paddies (R) were selected and half of them converted to vegetable fields (V) with the following treatments: rice paddies without N-fertilizer (R-CK), rice paddies with conventional N-fertilizer (R-CN), converted vegetable fields without N-fertilizer (V-CK), and converted vegetable fields with conventional N-fertilizer (V-CN) in a randomized block design with 3 replicates. N O emissions were measured with static chambers from December 2012 to December 2015. Within each V-CN plot, a root exclusion subplot was established to measure soil heterotrophic respiration (CO effluxes), a proxy for soil organic matter mineralization. Conversion of rice paddies to vegetable production dramatically increased N O emissions. The three-year cumulative N O emissions were 0.59, 1.90, 55.50 and 160.14kg N ha for R-CK, R-CN, V-CK and V-CN, respectively. The annual N O emissions from vegetable fields ranged between 5.99 and 113.45kg N ha yr , with substantially higher emissions in the first year. N O fluxes from V-CN were significantly and positively related to CO fluxes and inorganic N concentrations. The linear relationship between natural logarithms of N O and CO fluxes was stronger and the regression coefficient higher in the first year, showing the dependence of N O on soil organic matter mineralization. These results suggest that soil organic matter and N mineralization contributes significantly to N O emission following conversion of rice paddies to vegetable production. |
| ISSN |
00489697 |
| Journal |
Science of The Total Environment |
| Volume Number |
583 |
| e-ISSN |
18791026 |
| Language |
English |
| Publisher |
Elsevier |
| Publisher Date |
2017-04-01 |
| Publisher Place |
Netherlands |
| Access Restriction |
One Nation One Subscription (ONOS) |
| Subject Keyword |
Discipline Environmental Science |
| Content Type |
Text |
| Resource Type |
Article |
| Subject |
Environmental Chemistry Waste Management and Disposal Pollution Environmental Engineering |
