Coal Fly Ash and Polyacrylamide Influence Transport and Redistribution of Soil Nitrogen in a Sandy Sloping Land
Sandy soils are prone to nutrient losses, and consequently do not have as much as agricultural productivity as other soils. In this study, coal fly ash (CFA) and anionic polyacrylamide (PAM) granules were used as a sandy soil amendment. The two additives were incorporated to the sandy soil layer (de...
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MDPI AG
2021-01-01
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| Online Access: | https://www.mdpi.com/2077-0472/11/1/47 |
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| author | Kai Yang Zejun Tang Jianzhang Feng |
| author_facet | Kai Yang Zejun Tang Jianzhang Feng |
| author_sort | Kai Yang |
| collection | DOAJ |
| description | Sandy soils are prone to nutrient losses, and consequently do not have as much as agricultural productivity as other soils. In this study, coal fly ash (CFA) and anionic polyacrylamide (PAM) granules were used as a sandy soil amendment. The two additives were incorporated to the sandy soil layer (depth of 0.2 m, slope gradient of 10°) at three CFA dosages and two PAM dosages. Urea was applied uniformly onto the low-nitrogen (N) soil surface prior to the simulated rainfall experiment (rainfall intensity of 1.5 mm/min). The results showed that compared with no addition of CFA and PAM, the addition of CFA and/or PAM caused some increases in the cumulative NO<sub>3</sub><sup>−</sup>-N and NH<sub>4</sub><sup>+</sup>-N losses with surface runoff; when the rainfall event ended, 15% CFA alone treatment and 0.01–0.02% PAM alone treatment resulted in small but significant increases in the cumulative runoff-associated NO<sub>3</sub><sup>−</sup>-N concentration (<i>p</i> < 0.05), meanwhile 10% CFA + 0.01% PAM treatment and 15% CFA alone treatment resulted in nonsignificant small increases in the cumulative runoff-associated NH<sub>4</sub><sup>+</sup>-N concentration (<i>p</i> > 0.05). After the rainfall event, both CFA and PAM alone treatments increased the concentrations of NO<sub>3</sub><sup>−</sup>-N and NH<sub>4</sub><sup>+</sup>-N retained in the sandy soil layer compared with the unamended soil. As the CFA and PAM co-application rates increased, the additive effect of CFA and PAM on improving the nutrient retention of sandy soil increased. |
| first_indexed | 2024-03-09T05:22:04Z |
| format | Article |
| id | doaj.art-4daab28cd83140b08e0c3201908ca6ea |
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| language | English |
| last_indexed | 2024-03-09T05:22:04Z |
| publishDate | 2021-01-01 |
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| series | Agriculture |
| spelling | doaj.art-4daab28cd83140b08e0c3201908ca6ea2023-12-03T12:39:19ZengMDPI AGAgriculture2077-04722021-01-011114710.3390/agriculture11010047Coal Fly Ash and Polyacrylamide Influence Transport and Redistribution of Soil Nitrogen in a Sandy Sloping LandKai Yang0Zejun Tang1Jianzhang Feng2College of Water Sciences, Beijing Normal University, Beijing 100875, ChinaCollege of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, ChinaCollege of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, ChinaSandy soils are prone to nutrient losses, and consequently do not have as much as agricultural productivity as other soils. In this study, coal fly ash (CFA) and anionic polyacrylamide (PAM) granules were used as a sandy soil amendment. The two additives were incorporated to the sandy soil layer (depth of 0.2 m, slope gradient of 10°) at three CFA dosages and two PAM dosages. Urea was applied uniformly onto the low-nitrogen (N) soil surface prior to the simulated rainfall experiment (rainfall intensity of 1.5 mm/min). The results showed that compared with no addition of CFA and PAM, the addition of CFA and/or PAM caused some increases in the cumulative NO<sub>3</sub><sup>−</sup>-N and NH<sub>4</sub><sup>+</sup>-N losses with surface runoff; when the rainfall event ended, 15% CFA alone treatment and 0.01–0.02% PAM alone treatment resulted in small but significant increases in the cumulative runoff-associated NO<sub>3</sub><sup>−</sup>-N concentration (<i>p</i> < 0.05), meanwhile 10% CFA + 0.01% PAM treatment and 15% CFA alone treatment resulted in nonsignificant small increases in the cumulative runoff-associated NH<sub>4</sub><sup>+</sup>-N concentration (<i>p</i> > 0.05). After the rainfall event, both CFA and PAM alone treatments increased the concentrations of NO<sub>3</sub><sup>−</sup>-N and NH<sub>4</sub><sup>+</sup>-N retained in the sandy soil layer compared with the unamended soil. As the CFA and PAM co-application rates increased, the additive effect of CFA and PAM on improving the nutrient retention of sandy soil increased.https://www.mdpi.com/2077-0472/11/1/47fly ashpolyacrylamidesandy soilnitrate nitrogenammonia nitrogen |
| spellingShingle | Kai Yang Zejun Tang Jianzhang Feng Coal Fly Ash and Polyacrylamide Influence Transport and Redistribution of Soil Nitrogen in a Sandy Sloping Land Agriculture fly ash polyacrylamide sandy soil nitrate nitrogen ammonia nitrogen |
| title | Coal Fly Ash and Polyacrylamide Influence Transport and Redistribution of Soil Nitrogen in a Sandy Sloping Land |
| title_full | Coal Fly Ash and Polyacrylamide Influence Transport and Redistribution of Soil Nitrogen in a Sandy Sloping Land |
| title_fullStr | Coal Fly Ash and Polyacrylamide Influence Transport and Redistribution of Soil Nitrogen in a Sandy Sloping Land |
| title_full_unstemmed | Coal Fly Ash and Polyacrylamide Influence Transport and Redistribution of Soil Nitrogen in a Sandy Sloping Land |
| title_short | Coal Fly Ash and Polyacrylamide Influence Transport and Redistribution of Soil Nitrogen in a Sandy Sloping Land |
| title_sort | coal fly ash and polyacrylamide influence transport and redistribution of soil nitrogen in a sandy sloping land |
| topic | fly ash polyacrylamide sandy soil nitrate nitrogen ammonia nitrogen |
| url | https://www.mdpi.com/2077-0472/11/1/47 |
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