陕北石油污染对土壤球囊霉素含量的影响

发布时间：2018-01-03 05:18

本文关键词：陕北石油污染对土壤球囊霉素含量的影响　出处：《环境工程学报》2017年11期 　论文类型：期刊论文

【摘要】：球囊霉素(Glomalin)是丛枝菌根真菌产生的一种糖蛋白,总球囊霉素代表土壤长期积累的糖蛋白总浓度,易提取球囊霉素则反应近期分泌的浓度值。本研究以陕北川口采油厂油井土壤和安塞原油泄漏土壤为研究样地,采集石油污染土壤样品,测定丛枝菌根真菌孢子密度,土壤总球囊霉素、易提取球囊霉素的含量和土壤理化性质,并进一步分析球囊霉素与各类因子的相关性。结果表明,陕北土壤石油污染为点污染,10个样点中有5个点土壤石油烃含量超过500 mg·kg-1达到污染。由泄漏事故造成的原油污染最高达到16 980.0 mg·kg-1,远远超过日常生产带来的危害。川口油井旁样点0~20 cm土层孢子密度为0.48~4.8个·g-1干土,安塞样点0~20 cm土层孢子密度为2.5~10.1个·g-1干土,川口和安塞都是荒地对照点6点的孢子密度显著较高。川口油井旁样点0~20 cm土层总球囊霉素的含量在1.02~2.73 mg·g-1,0~20 cm土层易提取球囊霉素的含量在0.31~0.85 mg·g-1;安塞样点中0~20 cm土层总球囊霉素的含量在1.05~2.77 mg·g-1,0~20 cm土层中易提取球囊霉素的含量在0.14~0.88 mg·g-1,都是显著低于当地无污染对照土样。土壤总球囊霉素和易提取球囊霉素均与AM真菌孢子密度极显著正相关,并与土壤速效氮、土壤脲酶和酸性磷酸酶活性呈显著正相关。易提取球囊霉素与土壤石油烃浓度负相关,说明近期土壤中丛枝菌根真菌的活性和次生代谢受到石油污染的显著抑制。
[Abstract]:Glomalin (Glomalin) is a glycoprotein produced by arbuscular mycorrhizal fungi, the total Glomalin represents the total glycoprotein concentration in soil accumulated, easily extractable Glomalin reaction concentration. Recent secretion in this study in Chuankou oil production plant of Ansai oil leakage of soil and soil as the research sample, acquisition oil contaminated soil samples, determination of arbuscular mycorrhizal fungal spore density and total soil Glomalin, easy to extract and physicochemical properties of Glomalin content and soil, and further analysis of Glomalin and all kinds of factor correlation. The results show that the North Shaanxi oil contaminated soil to point pollution, 10 samples in 5 the soil petroleum hydrocarbons content more than 500 mg / kg-1. Achieve the pollution caused by leakage of crude oil pollution reached 16980 Mg - kg-1, far more than the harm brought by daily production. Kawaguchi wells near the sample 0~20 and cm soil spore density The degree of 0.48~4.8 / g-1 dry soil samples in Ansai, 0~20 cm 2.5~10.1, a soil spore density was g-1 dry soil, Sichuan and Ansai are wasteland control spore density was significantly higher at 6 points. The content of Kawaguchi wells near the sample 0~20 cm soil total Glomalin in 1.02~2.73 mg and g-1,0~20 cm soil layer easily extract Glomalin content in 0.31~0.85 mg g-1 0~20 cm; content of soil total Glomalin samples in Ansai at 1.05~2.77 mg g-1,0~20 in cm layer, easy to extract Glomalin content in 0.14~0.88 mg g-1, is lower than that of the local pollution control of soil samples. The soil total Glomalin and easy extract Glomalin and AM fungal spore density was significantly positive correlation with soil available nitrogen, was positively related to soil urease and acid phosphatase activities. Easily extractable Glomalin and petroleum hydrocarbon concentration in soil are negatively correlated, indicating that the recent soil arbuscular mycorrhizal fungi in it The activity of bacteria and secondary metabolism are significantly inhibited by oil pollution.

【作者单位】：延安大学石油工程与环境工程学院;
【基金】：延安市科技创新团队项目(2015CHTD-04) 陕西省教育厅项目(16JK1855) 延安大学引导项目(YD2015-14)
【分类号】：X53
【正文快照】： 丛枝菌根(arbuscular mycorrhizal,AM)是土壤中丛枝菌根真菌与植物形成的互惠共生体,能够增强植物对不良环境的抗性[1]。球囊霉素(Glomalin)是丛枝菌根真菌产生的一种含金属离子的糖蛋白[2],为葡萄糖或蔗糖亚单位的碳水化合物,储有丰富的碳素。球囊霉素在自然状态下极为稳定,

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