【摘要】 采用液体培养法研究了供试钾细菌对江西 4种酸性土壤和陕南黄褐土中 K、P、Si、Fe、Mn、Zn等 6种元素的活化作用。结果表明 :1接种钾细菌后 ,4种酸性土壤和陕南黄褐土中的速效 K、P、Si、Fe、Mn的平均生物释放量分别为 2 0 .4,6 9.8,10 0 .4,42 .6 ,15 .9和 40 .7,40 .5 ,5 2 5 .9,199.4,81.9m g/ kg,较不接菌对照增加 10 .6 %,80 .8%,37.4%,372 .0 %,10 9.2 %和 2 2 .7%,5 2 1.6 %,172 .8%,12 0 4.0 %,131.7%,中性黄褐土中各元素的释放量及增率均高于酸性土壤 ;2钾细菌能使 40 %酸性土样中的 Zn元素发生轻度活化 ,其余酸性及中性土样中的 Zn元素固定 ;3钾细菌在液体培养过程中产酸 ,接菌后 4种酸性土壤培养液的 p H值平均降低 1.0单位 ,较对照降低14.8%,产酸可能是钾细菌活化养分的途径之一。更多还原

【Abstract】 The dissolving effect of the silicate bacteria on K,P,Si,Fe,Mn and Zn elements in the mineral of four acid soil types from Jiangxi province and loess brown soil from the south of Shaanxi province had been studied by liquid culture.The results indicated that:① The quantities of average biological releasing (mg/kg) of the available K,P,Si,Fe and Mn in the acid soil and the neutral loess brown soil to which silicate bacteria were added were 20.4,69.8,100.4,42.6,15.9 and 40.7,40.5,525.9,199.4,81.9 mg/kg,which increased by 10.6%,80.8%,37.4%,372.0%,109.2% and 22.7%,521.6%,172.8%,1 204.0%,131.7% compared with the check experiment,respectively.In the neutral loess brown soil,the quantity released was larger and the increasing rate was higher than that in the acid soil.② The silicate bacteria could make zine element dissolve slightly in 40% of the acid soil samples.Zine element in the other acid and neutral soil samples had been fixed.③ The silicate bacteria could produce acid during liquid culture.After adding the silicate bacteria to the five acid soil types,the pH of the cultural liquid decreased by 1.0 pH unit or 14.8% compared with the check experiment.Producing acid might be one of the ways the silicate bacteria dissolving soil nutrients.更多还原