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| Effects of fertilizer reduction on Chinese cabbage yield and soil nitrogen surplus |
| Received:September 07, 2021 |
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| KeyWord:chemical fertilizer reduction;pig farm slurry;Chinese cabbage;yield;N surplus |
| Author Name | Affiliation | E-mail | | CHENG Juan | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | duhuiying@caas.cn | | FU Li | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | ZHAI Zhongwei | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | XIAO Nengwu | Shiyan Academy of Agricultural Science, Shiyan 442000, China | | | YANG Liu | Shiyan Academy of Agricultural Science, Shiyan 442000, China | | | LIU Fuyuan | Institute of Animal Husbandry and Veterinary Medicine, Xinjiang Academy of Agricultural Sciences, Shihezi 832000, China | | | DU Huiying | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | DU Lianzhu | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | dulianzhu99@163.com | | ZHANG Keqiang | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | |
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| Abstract: |
| To promote the green development of the Danjiangkou water conservation area, improve nitrogen use efficiency, and control agricultural non-point pollution, the effects of fertilizer reduction on Chinese cabbage yield, soil inorganic nitrogen, and nitrogen balance were studied using a field plot experiment. The results showed that the effect of 20% fertilizer reduction on Chinese cabbage yield was not significant, and there were no significant differences between treatments with pig farm slurry replacing chemical fertilizer and chemical fertilizer reduction at the same N application rate. The accumulation of soil nitrate N increased over the season and was significantly higher than the accumulation of soil ammonia N. Compared with that of conventional fertilization, the N surplus in the chemical fertilizer reduction treatment decreased by 23.38%, whereas that in the pig farm slurry treatment decreased by 29.24%~30.65%. In addition, N surplus was positively correlated with soil organic matter and nitrate N accumulation. In conclusion, chemical fertilizer reduction combined with pig farm slurry is an effective measure for reducing N surplus and increasing N use efficiency while ensuring Chinese cabbage yield. |
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