Role of carbon and nitrogen mineralisation of chitosan and crop straws in ameliorating acidity of acidic Ultisols
Rattachement africain : Cameroun, cn. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Context Carbon (C) and nitrogen (N) transformation processes in soils play an important role in the fluctuation of soil pH. Incorporation of chitosan and crop straws, byproducts from fishery and agriculture, into acidic soils can increase soil pH through decarboxylation, decomposition, N immobilisation and ammonification. Aims The study was designed to evaluate the transformation of organic N and C from chitosan and/or crop straws and their effects on soil physicochemical properties. Methods Chitosan, rice straw and maize straw were incubated with two acidic Ultisols from Langxi (Soil 1) and Yingtan (Soil 2) differing in initial pH. Six treatments were prepared in triplicate: control (no amendment), 4% chitosan, 4% rice straw, 4% maize straw, 2% chitosan + 2% rice straw, and 2% chitosan + 2% maize straw. Soil pH, N transformation and CO2 evolution were estimated at different time intervals. Key results After 40 days of incubation, control soil pH decreased by 0.35 and 0.32 units for Soils 1 and 2, respectively. Rice straw, maize straw, chitosan, rice straw–chitosan and maize straw–chitosan significantly increased soil pH by 0.51, 0.17, 2.27, 1.78 and 2.02 units for Soil 1, and 0.71, 0.16, 0.67, 0.49 and 0.68 units for Soil 2 (P < 0.01). The respective treatments decreased exchangeable acidity by 62%, 51%, 95%, 95% and 95% for Soil 1 and 75%, 69%, 88%, 88% and 87% for Soil 2. In treatments containing chitosan, the pH increase resulted from ammonification of organic N and mineralisation of organic C, with the effect higher in Soil 1 than Soil 2. Conclusions Amending acidic soils with chitosan and crop residues can effectively increase soil pH and slow soil acidification rate. Implications This study provides useful information for amelioration of acidic soils.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Role of carbon and nitrogen mineralisation of chitosan and crop straws in ameliorating acidity of acidic Ultisols
- Date Crossref
- 03/07/2023
- Éditeur
- CSIRO Publishing
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of Buea BDepartment of Chemistry University of Buea, Cameroun (code pays fourni par la source)Université ou école supérieure
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Shenzhen University pays non établi dans la noticeUniversité ou école supérieure
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Chinese Academy of Sciences pays non établi dans la noticeOrganisme public
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Institute of Soil Science pays non établi dans la noticeStructure de recherche
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University of Chinese Academy of Sciences pays non établi dans la noticeUniversité ou école supérieure
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AState Key Laboratory of Soil and Sustainable Agriculture pays non établi dans la noticeStructure de recherche
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College of Life Sciences and Oceanography DPresent address: Shenzhen Key Laboratory of Marine Bioresource and Eco-Environmental Science pays non établi dans la noticeUniversité ou école supérieure
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CCollege of Advanced Agricultural Sciences pays non établi dans la noticeUniversité ou école supérieure
BDepartment of Chemistry — University of Buea (University of Buea, Cameroun), Shenzhen University et Chinese Academy of Sciences, avec 5 autres affiliations. Pays d’affiliation : Cameroun.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.