Effect of biochar on soil acidity and aluminum morphology in tea plantations

Soil acidification in tea plantations has become a key factor restricting the development of industry. Biochar reduces soil acidity significantly and good short-term effects acidic improvement plantation trials, but duration effect long-term environmental biochar are still unclear. In this study, to which was applied five years ago studied. The separated analyzed for surface elements, aluminum form measured. results showed that : (1) Five after soil, elements increased significantly, indicating had certain degree adsorption on soil; (2) pH significantly; (3) exchangeable [Al 3+ ] monohydroxy dihydroxy [Al(OH) 2+ , Al(OH) both potential convert colloidal 3 ], conversion reduced content reactive thus increasing reducing toxicity plants.