Effects of nitrogen fertilizer and water management practices on pH and nitrogen distributions in the wetted-soil volume using drip irrigation
In the soil column experiments, the irrigation amount varied from 4.8 to 12 L, and the nitrogen application rate was from 80 to 360 kg ha−1. Three fertigation strategies were tested. The results indicated that an increase in water input led to an increase in the area of pH decrease in the soil at 10...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-10-01
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| Series: | Journal of Water and Climate Change |
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| Online Access: | http://jwcc.iwaponline.com/content/14/10/3447 |
| _version_ | 1797202739622576128 |
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| author | Zhenjie Qiu Rihui Luo Mengying Sun Wei Liao Yunyi Liu |
| author_facet | Zhenjie Qiu Rihui Luo Mengying Sun Wei Liao Yunyi Liu |
| author_sort | Zhenjie Qiu |
| collection | DOAJ |
| description | In the soil column experiments, the irrigation amount varied from 4.8 to 12 L, and the nitrogen application rate was from 80 to 360 kg ha−1. Three fertigation strategies were tested. The results indicated that an increase in water input led to an increase in the area of pH decrease in the soil at 10 days after the irrigation ended for a given lateral depth of 10 cm. The measurement of nitrogen distribution showed that the nitrogen content in the soil was significantly increased with the nitrogen application rate. Fertigation strategies substantially affect the pH and nitrogen distributions in soil. The strategy of applying water at first for one-fourth of the total irrigation time (1/4W), then applying fertilizer solution for one-half of the total irrigation time (1/2N), followed by applying water for the remaining one-fourth of the total irrigation time (1/4W) made a minimal soil pH decreasing area and a homogeneous nitrate distribution at 0–20 cm depth. Therefore, to reduce NO3-N leaching and avoid deep soil acidification, a dripline depth of 10 cm with an irrigation amount of 4.8 L and a nitrogen application rate of 80 kg ha−1 through the 1/4W–1/2N–1/4W fertigation may be suggested.
HIGHLIGHTS
Minor water and nitrogen input with shallow lateral depth can be conducive to reduce nitrate leaching.;
The NO3-N accumulation and pH decrease mainly appeared in surface soil through 1/4W–1/2N–1/4W fertigation.;
Drip irrigation is feasible to mitigate soil acidification.;
An ongoing field experiment confirms and improves the results of laboratory experiments without crops.; |
| first_indexed | 2024-03-11T11:14:20Z |
| format | Article |
| id | doaj.art-520c4318ddb641d88027f64a0dccda2a |
| institution | Directory Open Access Journal |
| issn | 2040-2244 2408-9354 |
| language | English |
| last_indexed | 2024-04-24T08:08:14Z |
| publishDate | 2023-10-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Water and Climate Change |
| spelling | doaj.art-520c4318ddb641d88027f64a0dccda2a2024-04-17T08:35:07ZengIWA PublishingJournal of Water and Climate Change2040-22442408-93542023-10-0114103447345910.2166/wcc.2023.111111Effects of nitrogen fertilizer and water management practices on pH and nitrogen distributions in the wetted-soil volume using drip irrigationZhenjie Qiu0Rihui Luo1Mengying Sun2Wei Liao3Yunyi Liu4 Hunan Engineering Research Center of Structural Safety and Disaster Prevention for Urban Underground Infrastructure, Hunan City University, Yiyang 413000, China Hunan Engineering Research Center of Structural Safety and Disaster Prevention for Urban Underground Infrastructure, Hunan City University, Yiyang 413000, China Hunan Engineering Research Center of Structural Safety and Disaster Prevention for Urban Underground Infrastructure, Hunan City University, Yiyang 413000, China Hunan Engineering Research Center of Structural Safety and Disaster Prevention for Urban Underground Infrastructure, Hunan City University, Yiyang 413000, China Hunan Engineering Research Center of Structural Safety and Disaster Prevention for Urban Underground Infrastructure, Hunan City University, Yiyang 413000, China In the soil column experiments, the irrigation amount varied from 4.8 to 12 L, and the nitrogen application rate was from 80 to 360 kg ha−1. Three fertigation strategies were tested. The results indicated that an increase in water input led to an increase in the area of pH decrease in the soil at 10 days after the irrigation ended for a given lateral depth of 10 cm. The measurement of nitrogen distribution showed that the nitrogen content in the soil was significantly increased with the nitrogen application rate. Fertigation strategies substantially affect the pH and nitrogen distributions in soil. The strategy of applying water at first for one-fourth of the total irrigation time (1/4W), then applying fertilizer solution for one-half of the total irrigation time (1/2N), followed by applying water for the remaining one-fourth of the total irrigation time (1/4W) made a minimal soil pH decreasing area and a homogeneous nitrate distribution at 0–20 cm depth. Therefore, to reduce NO3-N leaching and avoid deep soil acidification, a dripline depth of 10 cm with an irrigation amount of 4.8 L and a nitrogen application rate of 80 kg ha−1 through the 1/4W–1/2N–1/4W fertigation may be suggested. HIGHLIGHTS Minor water and nitrogen input with shallow lateral depth can be conducive to reduce nitrate leaching.; The NO3-N accumulation and pH decrease mainly appeared in surface soil through 1/4W–1/2N–1/4W fertigation.; Drip irrigation is feasible to mitigate soil acidification.; An ongoing field experiment confirms and improves the results of laboratory experiments without crops.;http://jwcc.iwaponline.com/content/14/10/3447fertigation strategyirrigation amountnitrogen application ratesoil acidificationsubsurface drip irrigation |
| spellingShingle | Zhenjie Qiu Rihui Luo Mengying Sun Wei Liao Yunyi Liu Effects of nitrogen fertilizer and water management practices on pH and nitrogen distributions in the wetted-soil volume using drip irrigation Journal of Water and Climate Change fertigation strategy irrigation amount nitrogen application rate soil acidification subsurface drip irrigation |
| title | Effects of nitrogen fertilizer and water management practices on pH and nitrogen distributions in the wetted-soil volume using drip irrigation |
| title_full | Effects of nitrogen fertilizer and water management practices on pH and nitrogen distributions in the wetted-soil volume using drip irrigation |
| title_fullStr | Effects of nitrogen fertilizer and water management practices on pH and nitrogen distributions in the wetted-soil volume using drip irrigation |
| title_full_unstemmed | Effects of nitrogen fertilizer and water management practices on pH and nitrogen distributions in the wetted-soil volume using drip irrigation |
| title_short | Effects of nitrogen fertilizer and water management practices on pH and nitrogen distributions in the wetted-soil volume using drip irrigation |
| title_sort | effects of nitrogen fertilizer and water management practices on ph and nitrogen distributions in the wetted soil volume using drip irrigation |
| topic | fertigation strategy irrigation amount nitrogen application rate soil acidification subsurface drip irrigation |
| url | http://jwcc.iwaponline.com/content/14/10/3447 |
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