Influence of Boron-Containing Oxides on Rhizosphere Soil Properties

Rhizobox experiment was conducted to investigate the influence of goethite and manganite boron-containing oxides on soil properties. The soil was treated with goethite, manganite and their boron-containing oxides including iron oxide with adsorbed boron (i.e. ad-B-goethite), iron oxide with occluded boron (i.e. oc-B-goethite), manganese oxide with adsorbed boron (i.e. ad-B-manganite) and manganese oxide with occluded boron (i.e. oc-B-manganite). It was found that two kinds of oxides and their boron-containing oxides had effect on alleviating soil acidity by increasing soil pH and decreasing soil exchangeable acid. The exchangeable acid showed a positive rhizosphere effect. Whereas the soil pH in the rhizosphere soil was lower than that in the bulk soil. The results of the experiment showed that both in the rhizosphere and the bulk soil, the activities of catalase, invertase and polyphenol oxidase were stimulated by the boron-containing oxides.