Experimental Study of the Effect of Controlled Drainage on Soil Water and Nitrogen Balance
Field experiments and micro test pit experiments are conducted at the Four Lake Watershed with a shallow groundwater table in the Hubei province of China in order to study the effect of controlled pipe drainage on soil moisture and nitrogen under different experiment scales. Soil moisture and nitrog...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/13/16/2241 |
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| author | Niannian Yuan Yujiang Xiong Yalong Li Baokun Xu Fengli Liu |
| author_facet | Niannian Yuan Yujiang Xiong Yalong Li Baokun Xu Fengli Liu |
| author_sort | Niannian Yuan |
| collection | DOAJ |
| description | Field experiments and micro test pit experiments are conducted at the Four Lake Watershed with a shallow groundwater table in the Hubei province of China in order to study the effect of controlled pipe drainage on soil moisture and nitrogen under different experiment scales. Soil moisture and nitrogen contents are continuously observed at the effective soil depth; water and nitrogen balance are calculated after several heavy rainfalls. The results showed that controlled pipe drainage significantly reduced the fluctuation of soil water content in the entire growth stage. There is a positive correlation between the soil moisture and the control water level in the test pits but no obvious correlation between them in the field experiments, which is related to the vertical and lateral recharge of groundwater in the field. After rainfall, soil organic matter mineralization was enhanced, and the control pipe drainage measures increased the relative content of soil mineralized ammonia nitrogen, which enhanced the stability of soil nitrogen and helped to reduce the loss of nitrogen. The calculation of soil water and nitrogen balance in the field and micro-area after rainfall showed that the soil water storage increased in the effective soil layer under the control water level of 30 cm and 50 cm after rainfall, and the amount of nitrogen mineralization was larger than that under the free drainage treatment. |
| first_indexed | 2024-03-10T08:17:18Z |
| format | Article |
| id | doaj.art-1e97480a38ab4483af2e680ae92c4473 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T08:17:18Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-1e97480a38ab4483af2e680ae92c44732023-11-22T10:14:47ZengMDPI AGWater2073-44412021-08-011316224110.3390/w13162241Experimental Study of the Effect of Controlled Drainage on Soil Water and Nitrogen BalanceNiannian Yuan0Yujiang Xiong1Yalong Li2Baokun Xu3Fengli Liu4Agricultural Water Conservancy Department, Chang Jiang River Scientific Research Institute, Wuhan 430010, ChinaAgricultural Water Conservancy Department, Chang Jiang River Scientific Research Institute, Wuhan 430010, ChinaAgricultural Water Conservancy Department, Chang Jiang River Scientific Research Institute, Wuhan 430010, ChinaAgricultural Water Conservancy Department, Chang Jiang River Scientific Research Institute, Wuhan 430010, ChinaAgricultural Water Conservancy Department, Chang Jiang River Scientific Research Institute, Wuhan 430010, ChinaField experiments and micro test pit experiments are conducted at the Four Lake Watershed with a shallow groundwater table in the Hubei province of China in order to study the effect of controlled pipe drainage on soil moisture and nitrogen under different experiment scales. Soil moisture and nitrogen contents are continuously observed at the effective soil depth; water and nitrogen balance are calculated after several heavy rainfalls. The results showed that controlled pipe drainage significantly reduced the fluctuation of soil water content in the entire growth stage. There is a positive correlation between the soil moisture and the control water level in the test pits but no obvious correlation between them in the field experiments, which is related to the vertical and lateral recharge of groundwater in the field. After rainfall, soil organic matter mineralization was enhanced, and the control pipe drainage measures increased the relative content of soil mineralized ammonia nitrogen, which enhanced the stability of soil nitrogen and helped to reduce the loss of nitrogen. The calculation of soil water and nitrogen balance in the field and micro-area after rainfall showed that the soil water storage increased in the effective soil layer under the control water level of 30 cm and 50 cm after rainfall, and the amount of nitrogen mineralization was larger than that under the free drainage treatment.https://www.mdpi.com/2073-4441/13/16/2241controlled drainagesoil water contentwater balancenitrogen balancenitrogen stabilitynitrogen mineralization |
| spellingShingle | Niannian Yuan Yujiang Xiong Yalong Li Baokun Xu Fengli Liu Experimental Study of the Effect of Controlled Drainage on Soil Water and Nitrogen Balance Water controlled drainage soil water content water balance nitrogen balance nitrogen stability nitrogen mineralization |
| title | Experimental Study of the Effect of Controlled Drainage on Soil Water and Nitrogen Balance |
| title_full | Experimental Study of the Effect of Controlled Drainage on Soil Water and Nitrogen Balance |
| title_fullStr | Experimental Study of the Effect of Controlled Drainage on Soil Water and Nitrogen Balance |
| title_full_unstemmed | Experimental Study of the Effect of Controlled Drainage on Soil Water and Nitrogen Balance |
| title_short | Experimental Study of the Effect of Controlled Drainage on Soil Water and Nitrogen Balance |
| title_sort | experimental study of the effect of controlled drainage on soil water and nitrogen balance |
| topic | controlled drainage soil water content water balance nitrogen balance nitrogen stability nitrogen mineralization |
| url | https://www.mdpi.com/2073-4441/13/16/2241 |
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