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| Estimation of reactive nitrogen loss and greenhouse gas emissions from vegetable production in Yangtze River Delta, China |
| Received:November 03, 2019 |
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| KeyWord:vegetable production;reactive nitrogen loss;greenhouse gas emissions;fertilizer application rates;Yangtze River Delta region |
| Author Name | Affiliation | E-mail | | ZHAO Ming-jiong | College of Resources & Environmental Sciences, China Agricultural University, Beijing 100193, China
College of Resources and Environment, Agricultural Green Development Research Center of Yangtze River Economic Belt, Southwest University, Chongqing 400716, China | | | WANG Xiao-zhong | College of Resources and Environment, Agricultural Green Development Research Center of Yangtze River Economic Belt, Southwest University, Chongqing 400716, China | wxz20181707@swu.edu.cn | | LIU Bin | College of Resources and Environment, Agricultural Green Development Research Center of Yangtze River Economic Belt, Southwest University, Chongqing 400716, China | | | ZOU Chun-qin | College of Resources & Environmental Sciences, China Agricultural University, Beijing 100193, China | | | CHEN Xin-ping | College of Resources and Environment, Agricultural Green Development Research Center of Yangtze River Economic Belt, Southwest University, Chongqing 400716, China | |
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| Abstract: |
| In this study, reactive nitrogen loss and greenhouse gas emissions from vegetable production in three provinces and one city in the Yangtze River Delta region were studied using life cycle assessments(LCAs)based on relevant statistical data. The results showed that reactive nitrogen loss and greenhouse gas emissions from vegetable production were relatively high,with average values of 103 kg N·hm-2 and 5 930 kg CO2-eq·hm-2 respectively, during 2012 to 2016. Furthermore,significant differences existed in reactive nitrogen loss and greenhouse gas emissions between different years. The lowest values were measured in 2015, namely 95.0 kg N·hm-2 and 5 618 kg CO2-eq·hm-2,which were 6.5%~12.3% and 3.5%~9.0% lower than those in other years, respectively. The average reactive nitrogen loss and greenhouse gas emissions in open-field and greenhouse vegetables system were 106 kg N·hm-2 and 5 157 kg CO2-eq·hm-2, and 93 kg N·hm-2 and 8 760 kg CO2-eq·hm-2 respectively. The average reactive nitrogen loss in Zhejiang Province was 2.8%~13.7% lower than that in other Provinces, and greenhouse gas emissions in Anhui Province were 1.4%~10.7% lower than that in other provinces in the study region. The following mitigation measures for high nitrogen fertilizer input, reactive nitrogen loss, and greenhouse gas emissions from vegetable production can be taken:controlling or optimizing nitrogen fertilizer application rate and applying higher-efficiency fertilizer during field experimental management. |
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