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- Title
Characteristics of nitrogen balance in open-air and greenhouse vegetable cropping systems of China.
- Authors
Ti, Chaopu; Luo, Yongxia; Yan, Xiaoyuan
- Abstract
Nitrogen (N) loss from vegetable cropping systems has become a significant environmental issue in China. In this study, estimation of N balances in both open-air and greenhouse vegetable cropping systems in China was established. Results showed that the total N input in open-air and greenhouse vegetable cropping systems in 2010 was 5.44 and 2.60 Tg, respectively. Chemical fertilizer N input in the two cropping systems was 201 kg N ha per season (open-air) and 478 kg N ha per season (greenhouse). The N use efficiency (NUE) was 25.9 ± 13.3 and 19.7 ± 9.4 % for open-air and greenhouse vegetable cropping systems, respectively, significantly lower than that of maize, wheat, and rice. Approximately 30.6 % of total N input was accumulated in soils and 0.8 % was lost by ammonia volatilization in greenhouse vegetable system, while N accumulation and ammonia volatilization accounted for 19.1 and 11.1 %, respectively, of total N input in open-air vegetable systems.
- Subjects
NITROGEN; CROPPING systems; GREENHOUSES; BIOACCUMULATION; AMMONIA
- Publication
Environmental Science & Pollution Research, 2015, Vol 22, Issue 23, p18508
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-015-5277-x