Effects of Different Exogenous Organic Materials on Improving Soil Fertility in Coastal Saline-Alkali Soil
The coastal saline-alkali soil in eastern China is an important reserve arable land resource. Adding exogenous organic material is an effective way to improve soil fertility and promote the conversion of saline-alkali soil to agricultural soil. In this study, a field plot experiment was used to inve...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/13/1/61 |
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| author | Wengang Zuo Lu Xu Meihua Qiu Siqiang Yi Yimin Wang Chao Shen Yilin Zhao Yunlong Li Chuanhui Gu Yuhua Shan Yanchao Bai |
| author_facet | Wengang Zuo Lu Xu Meihua Qiu Siqiang Yi Yimin Wang Chao Shen Yilin Zhao Yunlong Li Chuanhui Gu Yuhua Shan Yanchao Bai |
| author_sort | Wengang Zuo |
| collection | DOAJ |
| description | The coastal saline-alkali soil in eastern China is an important reserve arable land resource. Adding exogenous organic material is an effective way to improve soil fertility and promote the conversion of saline-alkali soil to agricultural soil. In this study, a field plot experiment was used to investigate the influences of different organic materials (vinegar residue, VR; sewage sludge, SS; vermicompost, VC) on the reduction in salinity-alkalinity barrier factors, the accumulation of soil organic carbon (SOC), and the improvement in soil fertility in saline-alkali soil. The results indicated that applying different types of exogenous organic materials reduced soil electrical conductivity (EC) and pH, promoted SOC accumulation, and increased the barley yield. With the same application rate, VR application was more beneficial in reducing soil EC and pH, accumulating SOC, and increasing barley yield compared to SS and VC applications. In particular, the barley yield with VR application was higher than that with SS and VC applications by 18.4% and 26.6% on average, respectively, during the two-year experiment. Correlation and path analysis revealed that the barley yield was significantly negatively correlated with soil barrier factors (EC and pH), but EC in SS and VC-treated soils had an indirect negative effect on barley yield, while EC in VR-treated soil had a direct negative effect (−2.24). In addition, the direct (−4.46) and indirect (5.39) contributions of SOC to barley yield were higher with VR than those with SS and VC, while the direct contribution of soil aggregate to barley yield was lower with VR than that with SS and VC. Therefore, compared with SS and VC applications, VR application led to a fast reduction in soil barrier factors and the rapid accumulation of SOC, which were more beneficial for increasing barley yields in saline-alkali soil. |
| first_indexed | 2024-03-09T13:52:14Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T13:52:14Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-999c0b52b01c48a5a95fe6a76f9ed0832023-11-30T20:48:22ZengMDPI AGAgronomy2073-43952022-12-011316110.3390/agronomy13010061Effects of Different Exogenous Organic Materials on Improving Soil Fertility in Coastal Saline-Alkali SoilWengang Zuo0Lu Xu1Meihua Qiu2Siqiang Yi3Yimin Wang4Chao Shen5Yilin Zhao6Yunlong Li7Chuanhui Gu8Yuhua Shan9Yanchao Bai10College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaDepartment of Agriculture and Rural Affairs of Jiangsu Province, Jiangsu Cultivated Land Quality and Agro-Environment Protection Station, Nanjing 210003, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaEnvironmental Research Center, Duke Kunshan University, Kunshan 215316, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaCollege of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, ChinaThe coastal saline-alkali soil in eastern China is an important reserve arable land resource. Adding exogenous organic material is an effective way to improve soil fertility and promote the conversion of saline-alkali soil to agricultural soil. In this study, a field plot experiment was used to investigate the influences of different organic materials (vinegar residue, VR; sewage sludge, SS; vermicompost, VC) on the reduction in salinity-alkalinity barrier factors, the accumulation of soil organic carbon (SOC), and the improvement in soil fertility in saline-alkali soil. The results indicated that applying different types of exogenous organic materials reduced soil electrical conductivity (EC) and pH, promoted SOC accumulation, and increased the barley yield. With the same application rate, VR application was more beneficial in reducing soil EC and pH, accumulating SOC, and increasing barley yield compared to SS and VC applications. In particular, the barley yield with VR application was higher than that with SS and VC applications by 18.4% and 26.6% on average, respectively, during the two-year experiment. Correlation and path analysis revealed that the barley yield was significantly negatively correlated with soil barrier factors (EC and pH), but EC in SS and VC-treated soils had an indirect negative effect on barley yield, while EC in VR-treated soil had a direct negative effect (−2.24). In addition, the direct (−4.46) and indirect (5.39) contributions of SOC to barley yield were higher with VR than those with SS and VC, while the direct contribution of soil aggregate to barley yield was lower with VR than that with SS and VC. Therefore, compared with SS and VC applications, VR application led to a fast reduction in soil barrier factors and the rapid accumulation of SOC, which were more beneficial for increasing barley yields in saline-alkali soil.https://www.mdpi.com/2073-4395/13/1/61coastal saline-alkali soilsoil fertility improvementexogenous organic materialsoil barrier factor |
| spellingShingle | Wengang Zuo Lu Xu Meihua Qiu Siqiang Yi Yimin Wang Chao Shen Yilin Zhao Yunlong Li Chuanhui Gu Yuhua Shan Yanchao Bai Effects of Different Exogenous Organic Materials on Improving Soil Fertility in Coastal Saline-Alkali Soil Agronomy coastal saline-alkali soil soil fertility improvement exogenous organic material soil barrier factor |
| title | Effects of Different Exogenous Organic Materials on Improving Soil Fertility in Coastal Saline-Alkali Soil |
| title_full | Effects of Different Exogenous Organic Materials on Improving Soil Fertility in Coastal Saline-Alkali Soil |
| title_fullStr | Effects of Different Exogenous Organic Materials on Improving Soil Fertility in Coastal Saline-Alkali Soil |
| title_full_unstemmed | Effects of Different Exogenous Organic Materials on Improving Soil Fertility in Coastal Saline-Alkali Soil |
| title_short | Effects of Different Exogenous Organic Materials on Improving Soil Fertility in Coastal Saline-Alkali Soil |
| title_sort | effects of different exogenous organic materials on improving soil fertility in coastal saline alkali soil |
| topic | coastal saline-alkali soil soil fertility improvement exogenous organic material soil barrier factor |
| url | https://www.mdpi.com/2073-4395/13/1/61 |
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