Enhanced-Efficiency Fertilizers Impact on Nitrogen Use Efficiency and Nitrous Oxide Emissions from an Open-Field Vegetable System in North China
文献类型： 外文期刊
作者： Fan, Daijia 1 ; He, Wentian 1 ; Jiang, Rong 1 ; Song, Daping 1 ; Zou, Guoyuan 1 ; Chen, Yanhua 1 ; Cao, Bing 1 ; Wang, Jiachen 1 ; Wang, Xuexia 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr Resources & Environm, Beijing 100097, Peoples R China
关键词： controlled-release urea; nitrification inhibitor; nitrous oxide emission; open vegetable field; cost-benefit analysis
期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）
ISSN：
年卷期： 2023 年 12 卷 1 期
页码：
收录情况： SCI
摘要： Open vegetable fields in China are a major anthropogenic source of nitrous oxide (N2O) emissions due to excessive nitrogen (N) fertilization. A 4 yr lettuce experiment was conducted to determine the impacts of controlled-release fertilizers (CRFs) and nitrification inhibitors (NIs) on lettuce yield, N2O emissions and net economic benefits. Five treatments included (i) no N fertilizer (CK), (ii) conventional urea at 255 kg N ha(-1) based on farmers' practice (FP), (iii) conventional urea at 204 kg N ha(-1) (OPT), (iv) CRF at 204 kg N ha(-1) (CU) and (v) CRF (204 kg N ha(-1)) added with NI (CUNI). No significant differences were found in the lettuce yields among different N fertilization treatments. Compared with FP, the cumulative N2O emissions were significantly decreased by 8.1%, 38.0% and 42.6% under OPT, CU and CUNI, respectively. Meanwhile, the net benefits of OPT, CU and CUNI were improved by USD 281, USD 871 and USD 1024 ha(-1) compared to CN, respectively. This study recommends the combined application of CRF and NI at a reduced N rate as the optimal N fertilizer management for the sustainable production of vegetables in China with the lowest environmental risks and the greatest economic benefits.
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