Mineral constituents profile of biochar derived from diversified waste biomasses: implications for agricultural applications.

摘要: The wide distribution and high heterogeneity of different elements in biochars derived from diverse feedstocks make it difficult to regulate their application soil evaluate the maximum potential contribution nutrients trace metals as well risk toxic metals. This study classified 20 biochars, covering six typical categories, into three clusters according similarity distance on minerals using cluster analysis. Four principle components (PC) were extracted factor analysis reduce dimension clearly characterize mineral profile these biochars. each group PCs every was clarified. PC1 had a loading for Mg, Cu, Zn, Al, Fe; PC2 related N, K, Mn; PC3 PC4 mainly represented P Ca. Cluster 1 included bone dregs eggshell with main contributors. 2 waterweeds waste paper which close shrimp hull chlorella contributions being PC4. 3 contributor. At biochar amendment rate 50 t ha, significantly elevated, whereas rise negligible compared Class I China Environmental Quality Standards Soil. Biochar can potentially supply metals, be applied appropriately soils so that excessive or deficient nutrient metal applications avoided.