综合利用亚铵法造纸制浆废液的研究之Ⅶ 施用亚铵制浆废液水稻土的氧化还原度与还原性物质的关系

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。

RELATIONSHIP BETWEENPE+PHOF THE PADDY SOIL DRESSED BY THE WASTE PULP OF AMMONIUM SULFITE PROCESS AND TEE ACTIVE REDUCING SUBSTANCES

This paper deals with the relationship betweenpe+pHof the paddy soil dressed by the waste pulp of ammonium sulfite process and the content of the active reducing substances. In the paddy soil dressed by the waste pulp of ammonium sulfite,pe+ pHcan move downward to 6-7,in the range of reducing soil and move further down to 4-5,reaching to the range of strongly reducing spil.The- re is a remarkable correlativity betweenpe+pHand logC_A and logC_(Ao). Its regressive equation is as follows: pe+pH=a-b logC_(Red) ...