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本文在上文讨论施用亚铵制浆废液对水稻土 Eh 影响的基础上,进一步讨论氧化还原度(pe+pH)与还原性物质含量的关系。施用黑液的水稻土,“pe+pH”一般可降到6-7,在还原性土壤的范围;最低降到4-5,达到强还原性土壤的范围。“pe+pH”与 logC 活、logC 有有显著相关,其回归方程为如下形式:pe+pH=a-blogC_(R·d)在水稻灌浆期,“pe+pH”与 C_活、C_有出现谷与峰值;亚铁含量较高,但是变化平缓,其中95%以上为水溶性非游离态离子,未构成对水稻的毒害作用。用“pe+pH”作为土壤氧化还原状况的强度指标,与 log C_活、log C_有的相关性,从本实验的结果,优于 Eh 指标。
Based on the above discussion of the effect of ammonium submerged pulping liquor on paddy soil Eh, the relationship between redox (pe + pH) and reducing substance content is further discussed. Paddy soil with black liquor, “pe + pH” can generally be reduced to 6-7, in the range of reducing soil; minimum down to 4-5, reach the range of strong reducing soil. “pe + pH ” was significantly correlated with logC activity and logC, and the regression equation was as follows: pe + pH = a-blogC_ (R · d) __, C_, there are valleys and peaks; ferrous content is higher, but the change is gentle, of which more than 95% of water-soluble non-free ions, did not constitute a toxic effect on rice. Using “pe + pH” as the intensity index of soil redox conditions, and log C_ live, log C_ some correlation, the results from this experiment, better than Eh indicators.