TITLE

离子型表面活性剂对菠菜生长与土壤酶活性的影响

AUTHOR(S)
戚兴超; 刘艳丽; 焦安昊; 贾继文; 张民; 李成亮
PUB. DATE
June 2016
SOURCE
Journal of Agro-Environment Science;2016, Vol. 35 Issue 6, p1048
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Ionic surfactants may pose risks to plants and soil microbes after entering soil. Here cetyltrimethyl ammonium bromide(CTAB) and sodium dodecyl sulfate(SDS) were used to investigate their effects on spinach biomass, and leaf antioxidant enzyme and soil enzyme activities in pot experiment. Results indicated that both CTAB and SDS promoted spinach growth at lower concentrations but showed inhibition at higher rates. The thresholds for the inhibitory effect of CTAB and SDS on spinach growth were 500 mg·kg-1 and 1000 mg·kg-1, respectively. Superoxide dismutase(SOD) activity depended on the surfactant concentrations. As CTAB concentration increased, the activity of SOD increased gradually and then decreased noticeably. However, the activity of SOD did not differ from the control at SDS less than 750 mg·kg-1, but decreased significantly at higher concentrations. Basically, CTAB and SDS inhibited catalase(CAT) activity. The activity of peroxidase(POD) was suppressed by CTAB or SDS under most cases. Besides, the activities of soil dehydrogenase, urease, sucrose, and neutral phosphatase were almost reduced or restrained by CTAB. However, SDS had the different effects on these enzymes. It promoted soil dehydrogenase and surcase activities, but inhibited soil urease and neutral phosphatase. Generally, both CTAB and SDS showed certain of toxicity to soil ecology, with CTAB being more harmful than SDS. These results would provide some references for assessing and managing the soil ecological security of ionic surfactants.
ACCESSION #
118016644

 

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