Biochar improves the nutrient cycle in sandy-textured soils and increases crop yield: a systematic review

作者：Madina Bekchanova, Luca Campion, Stephan B. Bruns, Tom Kuppens, Johannes Lehmann, Marijke Jozefczak, Ann Cuypers, Robert Malina · 发表于：Environmental Evidence · 年份：2024 · DOI：10.1186/s13750-024-00326-5 · 被引用次数：70 · 研究领域：Soil Carbon and Nitrogen Dynamics、Soil Geostatistics and Mapping、Clay minerals and soil interactions

BACKGROUND: Biochar is a relatively new development in sustainable agricultural management that can be applied to ameliorate degraded and less fertile soils, especially sandy-textured ones, to improve their productivity with respect to crop production through improved nutrient availability. However, as the literature has shown, the response of sandy-textured soils to biochar varies in terms of effect size and direction. Therefore, the present study systematically reviewed the available evidence to synthesize the impact of biochar amendments on aspects of the nutrient cycle of sandy-textured soils. METHODS: Both peer-reviewed and gray literature were searched in English in bibliographic databases, organizational web pages, and Internet search engines. Articles underwent a two-stage screening (title and abstract, and full-text) based on predefined criteria, with consistency checks. Validity assessments were conducted, utilizing specifically designed tools for study validity. Data extraction involved categorizing the various properties of the nutrient cycle into nine main Soil and Plant Properties (SPPs), each of which was studied independently. Nine meta-analyses were performed using a total of 1609 observations derived from 92 articles. Comparing meta-averages with and without correction for publication bias suggests that publication bias plays a minor role in the literature, while some indication for publication bias is found when accounting for heterogeneity by means of meta...