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| Effects of dairy effluent on N2O and NO emissions in aeolian sandy soil during a maize growing season |
| Received:October 26, 2022 |
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| KeyWord:dairy effluent;aeolian sandy soil;N2O emission;NO emission |
| Author Name | Affiliation | E-mail | | YANG Cong | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | LIU Deyan | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | HUANG Haowen | Nanjing Foreign Language School, Nanjing 210008, China | | | CHEN Lei | Inner Mongolia Youran Animal Husbandry Co., Ltd., Hohhot 010070, China | | | FAN Junming | Inner Mongolia Youran Animal Husbandry Co., Ltd., Hohhot 010070, China | | | WANG Yinhong | Inner Mongolia Youran Animal Husbandry Co., Ltd., Hohhot 010070, China | | | SHI Xiaodong | Inner Mongolia Youran Animal Husbandry Co., Ltd., Hohhot 010070, China | | | TIAN Yanfeng | Inner Mongolia Youran Animal Husbandry Co., Ltd., Hohhot 010070, China | | | DING Weixin | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | wxding@issas.ac.cn |
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| Abstract: |
| In order to explore a suitable regional scheme for the nearby absorption of manure from large-scale dairy farms, and slow down the greenhouse gas emissions from farmlands, field in-situ experiments were conducted to investigate the effects of applying dairy effluent （liquid organic fertilizer）on N2O and NO emissions and corn silage yields from aeolian sandy soil. The field experiment included five treatments：no fertilizer（CK）, conventional chemical fertilizer（NPK）, dairy manure as basal fertilizer and topdressing urea（SM）, dairy effluent applied three times（LMT）, and four times（LMF）. The results showed that under the nitrogen rate of 250 kg·hm–2, compared with NPK treatment, the cumulative N2O and NO emissions of SM treatment were reduced by 16.58% and 20.31%, respectively, and the LMT treatment by 39.59% and 30.02%, respectively. However, LMF treatment only reduced soil NO emissions, and had no significant impact on N2O emissions. Compared with LMT treatment, the N2O and NO emissions of LMF treatment increased by 76.92% and 13.04%, respectively during the maize growing season. The yield and nitrogen use efficiency of silage maize in the SM and LMT treatments were not significantly different from those under NPK, while the nitrogen use efficiency of dairy effluent was significantly reduced by 31.76% under LMF treatment. Overall, the recommended application scheme of liquid organic fertilizer in aeolian sandy soil is as follows：250 kg·hm–2 applied once as a base fertilizer and twice as a topdressing, the base to topdressing ratio is 40%∶20%∶40%, and the topdressing time is maize joint stage and big horn stage. This application mode can not only take advantage of large amounts of effluent from dairy farms, but also reduces N2O and NO emissions, achieving a win-win situation between silage maize production and the ecological environment. |
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