Biological aspects of soil buffer capacity against acidic precipitation

土壤酸缓冲能力对土壤微生物和土壤微生物的贡献进行了测定.土壤化学耐受性：土壤容量为2-75 cmol（+）kg <-1>^。土壤柱中加入酸后，淋溶水中HCO_3、Ca^2+、Si含量增加，SO_4 ~（2-）含量减少。这些离子响应酸缓冲能力的机制是CO_2-（/）_3-HCO_3、阳离子交换能力和矿物增溶、酸吸附。HClO_4与其它酸一样，对红壤的酸能力较强，因为HClO_4不利用微生物.培养基pH值：番茄和黄豆使pH值升高，而茶叶和大麦使pH值降低。当添加DCCD（质子ATP酶抑制剂）时，植物没有降低pH值，光照条件下大多数植物的pH值升高.植物对土壤酸缓冲能力的影响：当沙柱pH值达到3.3-3.7时（培养液中的硝酸盐或硫酸盐），种植大麦可使土壤酸缓冲能力增加20-30 mil/kg，番茄的酸缓冲能力小于大麦。对柱淋溶水进行了分析，植物受HCO_3增加和NO_3吸附的影响。在受害植株中，K^+和NH_4^+的含量较高。在酸性土壤上种植大麦后，pH值升高，HCO_3升高，NO_3降低。

Acid buffer capcities of soil to contribution of pants and soil microorganisms were following detected.1. Chemical soil tolerance : Soil varied 2-75 cmol (+) kg^<-1> capacities. Acid added to the soil column, then in leached water, HCO_3, Ca^<2+>, and Si increased, while SO_<2-(/)4> decreased. These ions response mechanisms of acid buffer capacities, which are CO_<2-(/)3>-HCO_3, cation exchange capacity, and mineral solublize, acid adsorbed. HCIO_4 as the other acids, was the strong acid capacity for the red soil, because HCIO_4 would not use microorganisms.2. pH in culturemedium : The pH was increased by tomato and tabacco, while decreased by tea and tow-lowed barley. When the added DCCD (inhibitors as proton ATP ase), plant did not decreased pH.Light condition increased pH in most plants.3. Plants affect soil acid buffers : Sand column to which pH 3.3-3.7 acid (nitrate or sulfate in culturesolution), when tow-lowed barley was grown then 20-30 mil/kg acid buffer increases.For acid buffer capacity, tomato could less than tow-lowed barley. Leached water from column was analyzes, plants affected by HCO_3 of increase and NO_3 of adsorbed. In the damaged plants, K^+ and NH_4^+ excelled. An acid soil grown on tow-lowed barley pH elevated with HCO_3 elevated and NO_3 decreased.