厌氧消化液对土壤中某些微量元素活化作用的初步研究

Preliminary Study on Activation Effect of Anaerobic Digestion Effluent on Trace Elements in Soil

用厌氧消化液处理三种不同类型的土壤，结果表明：厌氧消化液对土壤中的Ｃｕ有强活化作用，对Ｍｎ有较强的活化作用，对Ｚｎ的活化作用与很弱。当土壤ｐＨ高于厌氧消化液时，厌氧消化液对Ｆｅ有很强的活化作用；反之，厌氧消化液中的Ｆｅ选入土壤固相。厌氧消化液对土壤微量元素的活化可能以螯合作用为主，氧化还原作用为辅。这种活化作用及其自身所携带的微量元素可能对刺激作物生长有密切的关系。

Three types of soils with different characters were treated by anaeroblc digestlon effluent(ADE). The experimental results showed that ADE had a very strong activation effect soiI Cu, a strong actiyation effect on soil Mn and a weak activation effect on soil Zn. ADE also kad a very strong activation effect on soil Fe if treated soil pH is higher than that of ADE; Other-ise, Fe contained in ADE was absortied by soil stlid-phase. It is suggested that the mechanisms of activating soil trace elements by ADE chiefly are chelation effect and secondarily redox reaction. ADE's activating soil trace elements and the fact that ADE contains some trace elements would makea certain contribution to the Phenomenon that ADE could stimulate crop growth.