碱处理秸秆水吸力动态变化及与理化指标相关性分析  

Dynamics of Water Suction of Corn Stalks in Alakli Treatment and Its Relationships With Physicochemical Indexes

作　　者：云丽[1,2] 杨天学[3] 席北斗[2] 吴坤[1] 李翔[2] 陈斌[2] 杨婷[1,2] 任雨晴 

机构地区：[1]河南农业大学生命科学学院,河南郑州450002 [2]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012 [3]武汉大学资源与环境科学学院,湖北武汉430072 [4]北京师范大学环境学院,北京100875

出　　处：《生态与农村环境学报》2014年第3期398-402,共5页Journal of Ecology and Rural Environment

基　　金：国家"十二五"科技支撑计划(2012BAJ21B07)

摘　　要：为探索碱处理玉米秸秆过程中水吸力的动态变化及其与常规理化指标的相关性，进行w为0（对照）、2%、4%、6%、8%和10%的碱处理秸秆试验。结果表明，在0-48 h内各处理组水吸力均呈上升趋势，且水吸力增幅随碱浓度的升高而增加，w（NaOH）为0、2%、4%、6%、8%和10%处理组分别由0.14 kPa上升至0.41、2.30、2.60、2.78、2.94和3.21 kPa。随碱浓度增加，水吸力上升速率达到峰值的时间缩短，由对照组的40-48 h缩短至w（NaOH）为8%和10%处理组的0-3 h。Pearson相关性分析结果显示，秸秆基质颗粒的水吸力与碱处理浸提液化学需氧量（COD）、溶解性有机碳（DOC）、NH4＋-N和NO3--N浓度均呈显著正相关（P〈0.05或P〈0.01）。碱浓度增加和处理时间延长均能使基质颗粒的水吸力值增加，且水吸力值的增加趋势与常规理化指标COD、DOC、NH4＋-N和NO3--N浓度变化趋势相一致。An experiment was carried out to explore dynamics of water suction of corn stalk in alkali treatment and its relationships with conventional physicochemical indexes. The experiment was designed to have six treatments different in alkali concentration in treating corn stalks, i.e. CK （0）, 2%, 4%, 6%, 8% and 10%. Results show that all the treatments displayed rising trends in water suction in the first 48 hours, but varied in extent with the concentration of alkali used. Water suction rose from 0.14 kPa to 0.41, 2.30, 2.60, 2.78, 2.94 and 3.21 kPa, respectively, in Treatment CK, 2%, 4%, 6%, 8% and 10%（w） and the time for water suction rising to peak was shortened with alkali concentration, from 40-48 h in CK to 0-3 h in Treatments 8% and 10%. Pearson correlation analysis indicates that the water suction of the corn stalk granules was positively related to concentration of COD, DOC, NH4＋-N and NO3--N in the alkali solution. And in Treatment 6%, water suction was extremely significantly related to NH4＋-N content. So that, it is quite obvious that both higher alkali concentration and longer time of treatment can increase water suction of corn stalk granules.Further more, the increasing trend of water suction is consistent with changes in COD, DOC, NH4＋-N and NO3--N concentrations.

关 键 词：秸秆 碱处理 水吸力 

分 类 号：X712[环境科学与工程—环境工程]