烟气脱硫副产物改良碱性土壤过程中化学指标变化规律的研究  

VARIATION OF CHEMICAL INDICES OF ALKALINE SOIL AMELIORATED WITH DESULPHURIZATION BYPRODUCTS

作　　者：王金满[1] 杨培岭[1] 任树梅[1] 项光明[2] 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]清华大学热能工程系,北京100084

出　　处：《土壤学报》2005年第1期98-105,共8页Acta Pedologica Sinica

基　　金：国家高技术研究发展计划863基金项目(2001AA527015)资助

摘　　要：通过土柱淋洗试验的方法,研究了脱硫副产物在改良碱性土壤过程中对碱性土壤化学指标(代换性钠、ESP、SAR、pH值)的影响。本研究采用两种碱性土壤(强度碱化土和碱土),两种土壤各分两个脱硫副产物施用水平(强度碱化土为3 g kg-1和3 6 g kg-1;碱土为7 g kg-1和8 4 g kg-1)。结果表明,经过施加烟气脱硫副产物和淋洗各种试验处理的代换性钠、ESP、SAR和pH值都有了明显的降低,碱性土壤得到了改良;同时,高烟气脱硫副产物施加水平的碱性土壤改良效果要优于低施加水平的碱性土壤;强度碱化土和碱土分别施加3 6 g kg-1、8 4 g kg-1烟气脱硫副产物后,在强度碱化土表层(0~40 cm)和碱土表层(0~20 cm)ESP<15、SAR<13和pH<8 5,已经降至中度碱化土水平,改良效果显著。The soil column leaching method was adopted to study effects of application of desulphurisation products on chemical indices (exchangeable Na^(+),ESP,SAR and pH) of alkaline soil when they were used as amendment to ameliorate sodic soil. Two kinds of alkaline soils,strongly alkalized soil and alkaline soil,were tested in this experiment,with four levels of desulphurisation products,3 g kg^(-1) and 3. 6 g kg^(-1) for the former and 7 g kg^(-1) and 8. 4 g kg^(-1) for the latter. The results show that exchangeable Na^(+),ESP,SAR and pH decreased significantly after desulphurisation products were applied and the soils were leached in all the treatments,and the soils were improved. The effects of high rates of desulphurisation products were much better than of the low rates. After 3. 6 g kg^(-1) and 8 4 g kg^(-1) of desulphurisation products were applied,respectively,in the 0～40 cm surface layer of the strongly alkalized soil and 0～20 cm surface layer of the alkaline soil the chemical indices were all reduced to ESP<15,SAR<13 and pH<8 5, the criteria for moderately alkalized soils.

关 键 词：碱化 改良效果 淋洗 施用 变化规律 土壤 试验 烟气脱硫 副产物 土柱 

分 类 号：S823[农业科学—畜牧学] X701.3[农业科学—畜牧兽医]