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| The control of nitrogen leaching loss in soil irrigated with quaternary ammonium-salt-modified straw |
| Received:September 06, 2021 |
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| KeyWord:quaternary ammonium-salt-modified straw;biogas slurry;nitrogen;leaching loss |
| Author Name | Affiliation | E-mail | | ZHANG Lisheng | Agro-Environment Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | ZHAO Di | Agro-Environment Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | BO Luji | Shandong Academy of Agricultural Sciences Institute of Agricultural Resources and Environment, Jinan 250100, China | | | ZHANG Keqiang | Agro-Environment Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | WANG Feng | Agro-Environment Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | wangfeng_530@163.com |
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| Abstract: |
| To explore the effect of quaternary ammonium-salt-modified straw on soil nitrogen leaching under the condition of aquaculture fertilizer liquid-irrigation and the control effect, indoor soil-column simulation tests were performed by adding different amounts of quaternary ammonium-salt-modified straw(mass fractions of 0%, 1%, 2%, or 4%)under various addition methods(0~10 cm mixing, 0~20 cm mixing, or 10 cm as an interlayer)for different forms of nitrogen(total nitrogen, nitrate nitrogen, and organic nitrogen). The results showed that the control effect of nitrogen leaching improved with an increase in the amount of quaternary ammonium-salt-modified straw. The total nitrogen, nitrate nitrogen, and organic nitrogen leaching losses of the leaching solution were treated with 2% and 4% quaternary ammonium-salt-modified straws, respectively. Compared with the control, the total nitrogen, nitrate nitrogen, and organic nitrogen leaching losses decreased by 47.1%, 51.8%, and 24.7%, respectively, in the 2% treatment, and by 78.7%, 83.2%, and 57.6%, respectively, in the 4% treatment, reaching a significant level of 5% between the treatments. The effects of the three application methods on soil nitrogen leaching were not significant; however, compared with the control, the application of quaternary ammonium-salt-modified straw could inhibit ammonium in the irrigation process of the aquaculture fertilizer solution. The conversion of nitrogen from nitrogen to nitrate nitrogen reduced the risk of nitrogen leaching. In addition, the nitrogen leaching loss of the aquaculture fertilizer solution was mainly as nitrate nitrogen. The application of quaternary ammonium-salt-modified straw is an effective measure for controlling the nitrogen leaching loss of soil irrigated with aquaculture fertilizer solution. |
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