【作者】 汪小勇；

【导师】 张超兰；

【作者基本信息】 广西大学 ， 植物营养学， 2006， 硕士

【摘要】 本文主要分为两部分内容： 第一部分 土壤中六六六(HCH)残留量提取方法的确定 采用气相色谱毛细管色谱柱分离、电子捕获检测器检测土壤中残留的HCH含量。研究了索氏提取和超声波提取2种方法提取土壤中HCH的效果，结果表明，超声波提取法时间短、效率高，加标回收率在90.32％～103.92％之间，相对标准偏差为2.32～9.33。该方法准确、灵敏。 第二部分 HCH污染土壤的植物修复 (1)通过盆栽试验研究了受HCH及其主要降解产物污染土壤的植物修复技术，比较了12种牧草对α-HCH污染土壤的修复能力。研究表明，种植不同品种的牧草对土壤中α-HCH的消解的影响存在很大差异，其中种植多花黑麦草和紫花苜蓿的处理效果最好，与种植其它十种植物的处理之间达极显著水平。谷稗次之，其次为高丹草、苦荬菜和菊苣，再次鲁梅克斯，木豆、籽粒苋、御谷、柱花草、大翼豆。 (2)植物生物量的根／冠与土壤中HCH的消解率相关性达R=0.928，因此，我们认为，较高的根／冠是筛选植物的重要指标之一。 (3)通过对12种牧草修复周期的预测，种植多花黑麦草和紫花苜蓿只需三次即可达到预定要求，较其它牧草更为经济、适宜。 (4)在HCH污染土壤(1000mg／kg)中，以紫花苜蓿、多花黑麦草和籽粒苋为供试植物，研究了土壤中HCH浓度对牧草种子萌发和种子活力的影更多还原

【Abstract】 Two parts are given in the thesis:1. Study on the extracted methods of HCH residue in soilThe Capillary gas chromatographic method (GC) was introduced for determining HCH residues in soil. And two extracted methods, such as Soxhelt Extraction and Ultrasonic wave Assistant Extraction(UAE) have been studied. The analytical results showed that the UAE was more efficient and the time was shorter. The method was proved to be simple, rapid and sensitive. The sample recovery was 90.32%- 103.92%, and the relative standard deviation was 2.32 - 9.33.2. The phytoremediation of HCH contaminated soil(1) A phytoremediation technique for contaminated soil by HCH and its main degradation products planting 12 species of grasses was described. The results showed that different species have wide differences capacity in elimination of pollution. Medicago sativa L and Lolium multiforum Lan are best, the third is Echinochloa crusgalli (L.) Beauv. The fouth to sixth are Sorghum Hybrid Sudangrass Vactuca Denticulata Max. and Cichorium lntybus L. the last are Rumex patientia x R.tianschanicus, cv.Rumex k-1 Cajanus cajan (Linn) Hrth Amaranthus hypochondriacus L Pennisetum americanum L.Suhum. Stylosanthes gracilis H.B.K.and Macroptilium atropurpureum.(2) Correlation (R) between biomass S/R and HCH-dissipationed in soil is R=0.928, so high S/R is one of the important indicators to screening plants.(3) Through forecasting the period of repairing soil of twelve grasses, Medicago更多还原