脱硫废弃物施用对盆栽油葵碱化土壤微生物多样性的影响  

Effect of Appling Desulphurization Byproducts on Microbial Diversity in Alkaline Soil Under Potted-sunflower

作　　者：李凤霞[1,2] 杨涓[3] 许兴[1] 杨建国[2] 郑国琦[3] 南宁丽[4] 

机构地区：[1]宁夏大学农学院,银川750021 [2]宁夏农林科学院农业资源与环境研究所,银川750002 [3]宁夏大学生命科学院,银川750021 [4]宁夏农林科学院植物保护研究所,银川750021

出　　处：《土壤》2011年第2期270-276,共7页Soils

基　　金：国家科技支撑计划项目(2007BAC08B01);国家自然科学基金项目(40961020)资助

摘　　要：在宁夏平罗西大滩前进农场,利用盆栽试验以油葵为指示植物设置了脱硫废弃物5个不同施用量处理改良碱化土壤,采用Biolog Eco-plate技术对土壤微生物群落功能多样性进行了分析。结果表明：脱硫废弃物施用处理都能够降低土壤pH值0.06~0.29个单位;降低土壤全盐含量0.72~1.35 g/kg;脱硫废弃物施用能够明显提高土壤微生物活性及其微生物群落对碳源的利用水平;碱化土壤微生物对碳水化合物、羧酸类、聚合物类、氨基酸类化合物的利用较高,而对胺类和酚类化合物的利用都较低;并且适量的脱硫废弃物施用能够显著增加土壤微生物功能多样性,说明脱硫废弃物的施用并不是越多越好,而是要有一定的限量。本研究表明脱硫废弃物的施用量在2.5~7.5 g/kg土时,能够改善土壤理化性质和土壤微生物活性,从而达到改良碱化土壤的效果。A sunflower pot experiment was conducted in Qianjin Farm of Pingluo County in Ningxia to study the effects of desulfurization byproducts on the functional diversity of soil microbial communities in alkaline soil by Biolog Eco-plate technology.The results showed that applying desulfurization byproducts decreased soil pH by 0.06-0.29,decrease soil total salt content by 0.72-1.35 g/kg,significantly increased soil microbial activity and carbon source utilization level of microbial community;Carbohydrates,carboxylic acid,polymer and amino acid could be used as carbon sources in a higher level while amine and phenolic compounds in a lower level.However,only the proper applying amount of desulfurization byproducts could significantly increase soil microbial functional diversity,2.5-7.5 g/kg of desulfurization byproducts was the reasonable amount in this study in improving soil physical and chemical properties as well as microbial activity under the irrigation conditions.

关 键 词：脱硫废弃物 碱化土壤 油葵 微生物多样性 

分 类 号：S156[农业科学—土壤学]