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本文研究了苏联沃洛果达、克拉斯诺达尔等地八种起源和性质各异的土壤,在淹水下培养后土壤溶液pH、Eh等9项指标的变化.在碱性环境中Eh和rH_2值下降;活性Mn和P含量上升;溶液Ca/K比下降.提高培养温度,pH提高、rH_2下降,活性Fe、Mn和P量增加.生草土、草炭土和草甸黑钙土△Eh/△t(60～10天)的Eh缓冲范围在50～200mV,其余土壤为200～400mV.酸性土淹水后有最大的△pH/△t值,对pH缓冲性最小,但很快趋于稳定.Eh主要受E_o的影响,而E_o对于游离离子对和含该离子的比合物来说是不同的.因此,评价土壤淹水后物理性质的恶化,不可根据Eh、rH_2值,而有毒物质含量更为重要.
In this paper, eight kinds of soils with different origins and characteristics, such as Vorogucta and Krasnodar in the Soviet Union, were studied and the changes of pH, Eh and other nine indexes under the condition of submerged culture were studied.In the alkaline environment, Eh and rH_2 decreased, the content of Mn and P increased, the ratio of Ca / K decreased, the temperature and pH increased, rH_2 decreased, and the content of active Fe, Mn and P increased. The Eh buffer range of Eh / Δt (60 ~ 10 days) ranged from 50 to 200 mV, and the remaining soil ranged from 200 to 400 mV. Acidic soil had the largest △ pH / Δt after flooding, and had the lowest pH buffer but very fast Tends to be stable.Eh is mainly affected by E_o, and E_o is different for the free ion pair and the compound containing the ion.Therefore, to evaluate the deterioration of the physical properties of the soil after flooding can not be based on Eh, rH_2 value, The toxic substance content is more important.