The availability degree (AD, ratio of total content to available content) of Zn, As and F were affected by the contents of total elements, organic matter, free Fe and clay, as well as soil pH.

• 除铜以外，水稻土锌、砷、氟的有效度(有效量/全量)不同程度受土壤元素全量、有机质含量、游离铁含量、粘粒含量及土壤pH的影响。