Sewage sludge application enhances soil properties and rice growth in a salt-affected mudflat soil

Abstract The most important measures for salt-affected mudflat soil reclamation are to reduce salinity and to increase soil organic carbon (OC) content and thus soil fertility. Salinity reduction is often accomplished through costly freshwater irrigation by special engineering measures. Whether fert...

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Autores principales:	Yuhua Shan, Min Lv, Wengang Zuo, Zehui Tang, Cheng Ding, Zhixuan Yu, Ziyi Shen, Chuanhui Gu, Yanchao Bai
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/25b045abc8cc47f7a8918bf8ddea762a
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spelling	oai:doaj.org-article:25b045abc8cc47f7a8918bf8ddea762a2021-12-02T15:22:56ZSewage sludge application enhances soil properties and rice growth in a salt-affected mudflat soil10.1038/s41598-020-80358-22045-2322https://doaj.org/article/25b045abc8cc47f7a8918bf8ddea762a2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80358-2https://doaj.org/toc/2045-2322Abstract The most important measures for salt-affected mudflat soil reclamation are to reduce salinity and to increase soil organic carbon (OC) content and thus soil fertility. Salinity reduction is often accomplished through costly freshwater irrigation by special engineering measures. Whether fertility enhancement only through one-off application of a great amount of OC can improve soil properties and promote plant growth in salt-affected mudflat soil remains unclear. Therefore, the objective of our indoor pot experiment was to study the effects of OC amendment at 0, 0.5%, 1.0%, 1.5%, and 2.5%, calculated from carbon content, by one-off application of sewage sludge on soil properties, rice yield, and root growth in salt-affected mudflat soil under waterlogged conditions. The results showed that the application of sewage sludge promoted soil fertility by reducing soil pH and increasing content of OC, nitrogen and phosphorus in salt-affected mudflat soil, while soil electric conductivity (EC) increased with increasing sewage sludge (SS) application rates under waterlogged conditions. In this study, the rice growth was not inhibited by the highest EC of 4.43 dS m−1 even at high doses of SS application. The SS application increased yield of rice, promoted root growth, enhanced root activity and root flux activity, and increased the soluble sugar and amino acid content in the bleeding sap of rice plants at the tillering, jointing, and maturity stages. In conclusion, fertility enhancement through organic carbon amendment can “offset” the adverse effects of increased salinity and promote plant growth in salt-affected mudflat soil under waterlogged conditions.Yuhua ShanMin LvWengang ZuoZehui TangCheng DingZhixuan YuZiyi ShenChuanhui GuYanchao BaiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuhua Shan Min Lv Wengang Zuo Zehui Tang Cheng Ding Zhixuan Yu Ziyi Shen Chuanhui Gu Yanchao Bai Sewage sludge application enhances soil properties and rice growth in a salt-affected mudflat soil
description	Abstract The most important measures for salt-affected mudflat soil reclamation are to reduce salinity and to increase soil organic carbon (OC) content and thus soil fertility. Salinity reduction is often accomplished through costly freshwater irrigation by special engineering measures. Whether fertility enhancement only through one-off application of a great amount of OC can improve soil properties and promote plant growth in salt-affected mudflat soil remains unclear. Therefore, the objective of our indoor pot experiment was to study the effects of OC amendment at 0, 0.5%, 1.0%, 1.5%, and 2.5%, calculated from carbon content, by one-off application of sewage sludge on soil properties, rice yield, and root growth in salt-affected mudflat soil under waterlogged conditions. The results showed that the application of sewage sludge promoted soil fertility by reducing soil pH and increasing content of OC, nitrogen and phosphorus in salt-affected mudflat soil, while soil electric conductivity (EC) increased with increasing sewage sludge (SS) application rates under waterlogged conditions. In this study, the rice growth was not inhibited by the highest EC of 4.43 dS m−1 even at high doses of SS application. The SS application increased yield of rice, promoted root growth, enhanced root activity and root flux activity, and increased the soluble sugar and amino acid content in the bleeding sap of rice plants at the tillering, jointing, and maturity stages. In conclusion, fertility enhancement through organic carbon amendment can “offset” the adverse effects of increased salinity and promote plant growth in salt-affected mudflat soil under waterlogged conditions.
format	article
author	Yuhua Shan Min Lv Wengang Zuo Zehui Tang Cheng Ding Zhixuan Yu Ziyi Shen Chuanhui Gu Yanchao Bai
author_facet	Yuhua Shan Min Lv Wengang Zuo Zehui Tang Cheng Ding Zhixuan Yu Ziyi Shen Chuanhui Gu Yanchao Bai
author_sort	Yuhua Shan
title	Sewage sludge application enhances soil properties and rice growth in a salt-affected mudflat soil
title_short	Sewage sludge application enhances soil properties and rice growth in a salt-affected mudflat soil
title_full	Sewage sludge application enhances soil properties and rice growth in a salt-affected mudflat soil
title_fullStr	Sewage sludge application enhances soil properties and rice growth in a salt-affected mudflat soil
title_full_unstemmed	Sewage sludge application enhances soil properties and rice growth in a salt-affected mudflat soil
title_sort	sewage sludge application enhances soil properties and rice growth in a salt-affected mudflat soil
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/25b045abc8cc47f7a8918bf8ddea762a
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Sewage sludge application enhances soil properties and rice growth in a salt-affected mudflat soil

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