Straw carbonization and returned to the field: Mechanism of iron-modified biochar on soil improvement and rice growth response in saline-alkali coastal land

Straw carbonization and returned to the field: Mechanism of iron-modified biochar on soil improvement and rice growth response in saline-alkali coastal land | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 20 March 2025 V1 Latest version Share on Straw carbonization and returned to the field: Mechanism of iron-modified biochar on soil improvement and rice growth response in saline-alkali coastal land Authors : Zongnan Li , Jingyun Li , Binlian Ouyang , Xin Tang , Bo Shen , Zhichao Xiang , Aibin , Wenbang Tang , Wei Luo [email protected] , and Zhi Zhou Authors Info & Affiliations https://doi.org/10.22541/au.174246162.20896537/v1 191 views 79 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract There is a substantial demand for soil amelioration in coastal saline-alkali land. Carbonizing straw is an eco-friendly and cost-effective method for producing soil amendment products. However, the effect of direct application of biochar on saline-alkali land improvement is not good or even harmful. Therefore, a new kind of humic acid magnetic biochar (HAFO) was prepared by pyrolysis, oxidation and activation, and its properties and pot experiment results were evaluated. The results showed that pyrolysis and oxidation effectively load nano-Fe 3 O 4 onto biochar while reducing its particle size to the sub-micron level. In this process, the properties of biochar are improved (surface oxygen-containing functional groups, polarity, nutrient elements, etc.), making it more conducive to saline-alkali land improvement. The pot experiment showed that rice growth and development were affected by soil organic matter content, cation exchange capacity, salinity and nutrient content (p<0.05). Biochar alleviated the effects of salt stress on rice by improving soil properties, that thus promoted the growth and development of rice. The effect of biochar on the improvement of saline-alkali soil and on the growth of rice is mainly affected by its own properties, and appropriate modification methods can make better utilization of straw resources. The HAFO prepared in this study is an economical and efficient soil conditioner for saline-alkali land, which is of great significance for world food security. Supplementary Material File (manuscript.docx) Download 4.71 MB Information & Authors Information Version history V1 Version 1 20 March 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords biochar humic acid iron modification saline-alkali soil improvement saline-alkali tolerant rice Authors Affiliations Zongnan Li Hunan Agricultural University View all articles by this author Jingyun Li Hunan Agricultural University View all articles by this author Binlian Ouyang Hunan Agricultural University View all articles by this author Xin Tang Hunan Agricultural University View all articles by this author Bo Shen Hunan Agricultural University View all articles by this author Zhichao Xiang Hunan Agricultural University View all articles by this author Aibin China National Hybrid Rice Research and Development Centre View all articles by this author Wenbang Tang China National Hybrid Rice Research and Development Centre View all articles by this author Wei Luo [email protected] Hunan Agricultural University View all articles by this author Zhi Zhou Hunan Agricultural University View all articles by this author Metrics & Citations Metrics Article Usage 191 views 79 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Zongnan Li, Jingyun Li, Binlian Ouyang, et al. Straw carbonization and returned to the field: Mechanism of iron-modified biochar on soil improvement and rice growth response in saline-alkali coastal land. Authorea . 20 March 2025. DOI: https://doi.org/10.22541/au.174246162.20896537/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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