土壤石油污染对植物苗期生长和土壤呼吸的影响

被引:34
作者
李小利
刘国彬
薛萐
许明祥
机构
[1] 中国科学院教育部水土保持与生态环境研究中心
关键词
土壤石油污染; 种子萌发; 植物生长; 土壤呼吸;
D O I
10.13870/j.cnki.stbcxb.2007.03.022
中图分类号
X53 [土壤污染及其防治];
学科分类号
082803 ; 120405 ;
摘要
选取陕北延安地区原油和黄绵土,设计了完全混合和表面施油两种处理方式,通过盆栽试验,研究了不同浓度石油污染处理对植物生长和土壤呼吸的影响。结果表明,玉米和紫花苜蓿在完全混合的油污土壤上萌发良好,但生长受阻,而表面喷洒处理的石油污染严重影响紫花苜蓿的萌发和生长;土壤呼吸作用对石油污染十分敏感,完全混合处理土壤呼吸与石油污染比例成正相关关系,污染越重,土壤呼吸强度越大,所有污染处理1周后土壤呼吸强度出现抑制而迅速回落,并在波动中逐渐趋于稳定,但仍然显著高于对照组,表明黄土中存在对石油耐受的土著微生物群落。
引用
收藏
页码:95 / 98+127 +127
页数:5
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