|
| Effects of different nitrogen fertilizer types on NH3 volatilization from open-air vegetable fields |
| Received:December 23, 2020 |
| View Full Text View/Add Comment Download reader |
| KeyWord:nitrogen fertilizer;open-air vegetable;NH3 volatilization;environmental loss |
| Author Name | Affiliation | E-mail | | LI Xiao-ming | College of Environment Science and Engineering, Yangzhou University, Yangzhou 225000, China
Changshu Agro-eclological National Field Scientific Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | JU Jing | College of Environment Science and Engineering, Yangzhou University, Yangzhou 225000, China | jujing@yzu.edu.cn | | XIA Yong-qiu | Changshu Agro-eclological National Field Scientific Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | yqxia@issas.ac.cn | | QIAN Xiao-qing | College of Environment Science and Engineering, Yangzhou University, Yangzhou 225000, China | | | YAN Xiao-yuan | Changshu Agro-eclological National Field Scientific Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | ZHOU Wei | Changshu Agro-eclological National Field Scientific Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | |
|
| Hits: 1062 |
| Download times: 1060 |
| Abstract: |
| To reduce NH3 volatilization from open-air vegetable fields, NH3 volatilization rates from four seasons of vegetables under different nitrogen fertilizer treatments were compared from May to November 2019 in Changshu Agro-Ecological Experimental Station, Chinese Academy of Sciences. According to local fertilization practices, the total N-fertilizer application rate was set as 200 kg·hm-2, and five treatments were established： urea fertilization（N200）, nitro-compound fertilizer（N200A）, urease inhibitor urea（N200B）, organic fertilizer partial substitution（N200C）, and no fertilization（CK）. NH3 volatilization was measured by closed-chamber ventilation methods, and environmental benefits caused by NH3 volatilization（calculated by N）were calculated. The results showed that the cumulative NH3 volatilization of N200 was 24.75 kg·hm-2, while the cumulative NH3 volatilization emission of N200A was 3.75 kg·hm-2, which was 84.84% lower than that of N200（P<0.05）. The cumulative emissions of NH3 volatilization of the N200B and N200C treatments were 74.52%（P<0.05）and 48.71%（P<0.05）lower than that of the N200 treatment, respectively. The environmental losses caused by NH3 volatilization for the N200 and N200C treatments were 928.13 yuan·hm-2 and 476.25 yuan·hm-2, respectively. The N200A treatment had the highest vegetable yield, reaching 34.03 t·hm-2, which was 25.13% higher than that of N200; meanwhile, the environmental loss（140.63 yuan·hm-2）was lowest among all the treatments. This showed that NH3 volatilization from open-air vegetable fields in the Taihu Lake region can be reduced by using nitro-compound fertilizer, partial substitution of organic fertilizer, and addition of urease inhibitor. Among these, nitrocompound fertilizer resulted in the highest vegetable yield and the lowest environmental loss caused by NH3 volatilization. |
|
|
|
